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Emerson Fisher 3570 Instruction Manual

1. 4 EO 98 97 g9 88 86 POSITIONERS UI M 93 41A7131 A B1839 IL Instruction Manual D200137X012 3570 Positioners September 2011 35 3570 Positioners Instruction Manual September 2011 D200137X012 Neither Emerson Emerson Process Management nor any of their affiliated entities assumes responsibility for the selection use or maintenance of any product Responsibility for proper selection use and maintenance of any product remains solely with the purchaser and end user Fisher and FlowScanner are marks owned by one of the companies in the Emerson Process Management business division of Emerson Electric Co Emerson Process Management Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co All other marks are the property of their respective owners The contents of this publication are presented for informational purposes only and while every effort has been made to ensure their accuracy they are not to be construed as warranties or guarantees express or implied regarding the products or services described herein or their use or applicability All sales are governed by our terms and conditions which are available upon request We reserve the right to modify or improve the designs or specifications of such products at any time without notice Emerson Process Management Marshalltown lowa 50158 USA Sorocaba 180
2. 23 Relay Operation cece eee eee ee eee 24 Maintenance cece eee eee eee ee eens 25 Troubleshooting 0 cece eee eee 26 Converting a 3570 Valve Positioner to a 3570C Valve Positioner 4 27 Range Spring cece cece ee eee e eens 28 Disassembly cece eee e ees 28 Assembly i32 discard sand totes eite vas 28 Introduction Scope of Manual Figure 1 Fisher 3570 Positioner Mounted on 470 Actuator A o m W5566 IL Bias Spring rer Wibos Wii be stead waite 29 Disassembly cece eee eee ees 29 Assembly ceci eae ee eee EE CE ES 29 Parts Ordering 0 cc cece cece a eeees 29 Parts Kits osccosec ree er eR RUE EYES 30 Positioner Repair Kits 0000 30 Diagnostic Test Connection Kits 30 PILE b sRL ei bn ae ER E E RS 30 Positioner Common Parts sssuu 30 This manual provides installation operation adjustment maintenance and parts ordering information for Fisher 3570 pneumatic valve positioners The various product types within this series are described later in this manual Refer e S EMERSON www Fisher com Process Management 3570 Positioners Instruction Manual September 2011 D200137X012 to figure 1 for a typical mounting of a 3570 positioner Refer to separate instruction manuals for information concerning the actuator valve and accessories Do not install
3. For Diaphragm Actuators Stainless steel Steel For Piston Actuators Stainless steel Steel Pipe Thread Sealant not furnished with hardware or connectors 30 Parts List Positioner Common Parts figures 11 and 12 Note Part numbers are shown for recommended spares only For part numbers not shown contact your Emerson Process Management sales office Key Description Part Number 1 Pilot base aluminum Pedestal aluminum 3 Pedestal gasket Chloroprene std const 1H854703012 Fluorocarbon hi temp const 1H8547X0012 4 Machine screw pl steel 5 req d 5 Gauge bracket pl steel For all types except 3570C 6 Bias spring post pl steel 7 Hex nut pl steel 2 req d 8 Spring seat pl steel use with key 48 only 9 Bias Spring extension type Color Code Black Pink Dark green 10 Retaining ring pl steel 2 req d 11 Beam aluminum 12 Flapper SST 2 req d 13 Flapper arm aluminum 14 Horizontal flexure strip 2 req d 15 Vertical flexure strip 16 Machine screw pl steel 2 req d 17 Machine screw pl steel For 3570 3570C 3571 12 req d For 3572 3573 3576 3577 11 req d 18 Range Spring pl steel See table 5 19 Spring retainer SST See table 7 20 Spring lock SST 21 Bellows assembly brass To 3 4 bar 50 psig 1H8610000A2 High pressure bellows brass over 3 4 bar 50 psig 1H9010000A2 22 Bellows post brass 2 req d 23 Name plate aluminum 24 Instrument gauge plastic case brass wetted parts For all types e
4. Mount the relays in their respective positions on the positioner pedestal making certain that the relay gasket key 30 is in good condition and is in place If the positioner operation is still sluggish a slight adjustment of the bias spring post see figure 2 might be necessary Loosen the locknut and rotate the post in half turn increments checking after each half turn for proper operation Rotate the post no more than two turns from the position shown in figure 2 Refer to the adjustment procedures after rotating the post to check the position of the post and beam assemblies Converting a 3570 Valve Positioner to a 3570C Valve Positioner If desired tire valves can be substituted for pressure gauges Also locking relay nozzles can be added on any 3570 positioner This provides the construction that is standard with 3570C and 3570PC positioners Key numbers used in this procedure are shown in figure 11 except where indicated When reassembling coat all pipe threads with a good quality pipe thread compound 1 Isolate the control valve from the line pressure and release pressure from both sides of the valve body If using a power actuator also shut off all pressure lines to the power actuator and release all pressure from the actuator Use lock out procedures to be sure that the above measures stay in effect while you work on the equipment 2 Loosen the knurled screws key 38 and remove the cover key 39 3 Disconnect the
5. 5 Remove the screw from the spring cap and slowly release the torsion spring force by turning the spring cap clockwise Disconnect the cable strap from the actuator and remove all range spring extension by rotating the cable spool 3570 Positioners Instruction Manual September 2011 D200137X012 6 Rotate the cable spool to obtain the correct initial range spring extension Each full revolution of the spool extends the range spring 50 8 mm 2 inches 6 4 mm 1 4 inch for 1 8 revolution If the initial range spring extension is not specified calculate it using one of the equations given below Round off the amount of extension e obtained from the equation to the next higher 6 4 mm 1 4 inch T e standard bellows 1 87 Ph T e optional high pressure bellows 1 25 Ph where e initial range spring extension required in mm T actuator travel in mm Pa input signal span in bar for example 0 8 bar for a 0 2 to 1 bar input signal range or where e initial range spring extension required in inches T actuator travel in inches Ph input signal span in psi for example 12 psi for a 3 to 15 psig input signal range 7 If necessary move the actuator cable ball to the spool slot nearer the access opening With the actuator piston rod fully retracted and the range spring at the correct initial extension attach the cable strap to the actuator feedback arm Use the set of cable strap holes that
6. Insert the threaded end of the spring retainer key 19 figure 2 into the center of the range spring see figure 2 Then insert a screwdriver into the center of the range spring and extend the spring until the spring retainer can be screwed into the top of the actuator piston rod extension Tighten the spring retainer into the top of the actuator piston rod extension If the range spring and or bias spring is not installed in the positioner refer to the procedures for either spring in the Maintenance section For 3570P and 3570PC positioners attach the positioner extension and positioner to the cylinder mounting plate with the two cap screws key 100 figure 14 Make the required pressure connections as described in the following procedure Go to the initial range spring extension procedures for 3570P and 3570PC positioners For 3571 3576 and 3577 positioners insert two cap screws through the holes in the mounting bracket key 55 figure 13 to attach the positioner to the actuator mounting boss Attach the hex drive stud to the actuator valve stem connection Attach the end bearing key 56E figure 13 to the hex drive stud 3570 Positioners Instruction Manual September 2011 D200137X012 Figure 2 Bias and Range Springs for Zero and Span Adjustments SPRING LOCK BELLOWS BEAM TRAVEL STOP E RING BIAS SPRING POST BIAS SPRING RANGE SPRING KEY 18 ZERO ADJUSTMENT SPRING RETAINER KEY 19 SPRING RETAI
7. 44 5 1 3 4 8G5 8A5 117 5 4 5 8 2 13G3 13A3 66 7 2 5 8 9B3 9B3 95 3 8 10A2 10D2 68 3 2 11 16 9G10 9B10 69 9 2 3 4 9G10 9B10 Ml Xe 10A2 10D2 23 2 7 8 oc ns 15 9 5 8 3A2 3D2 50 8 2 8G5 8A5 127 5 3 13G4 13A4 19 3 4 11A4 11D4 79 4 3 1 8 9A3 9B3 152 4 6 13G3 13A3 22 2 7 8 11A5 11D5 101 6 4 9A12 9812 165 1 6 1 2 13G3 13A3 1048 4 1 8 9G1 9B1 177 8 7 1368 13A8 746 2 15 16 9G5 9B5 127 5 21B8 21D8 203 2 8 18G8 18A8 76 2 3 9612 9A12 206 4 8 1 8 18G8 18A8 78 5 3 09 968 9B8 ae 1 f 8 oe DE 794 3 1 8 967 97 1 SIGNAL RANGE 82 6 3 1 4 9G10 9810 2 ae RE 2 0 to 2 0 bar i 7 uto pig SIGNAL RANGE 381 1 1 2 2c10 2c10 0 2 to 1 0 bar 3 to 15 psig 15 9 5 8 10D2 10D2 849 3 11 32 9G8 9B8 19 3 4 10D3 10D3 85 7 3 3 8 9G13 9B13 254 1 1144 7104 32 ME VH4 17H4 865 333 32 9G10 10 439 173 2612 2D12 28 6 1 1 8 1145 11D5 32 1 8 10D3 10D3 88 9 3 1 2 9613 9B13 47 6 1 7 8 2610 2C10 33 3 4 56 32 1 11012 4 5 32 10D2 10H2 92 3 5 8 9613 9813 908 G10 ie eek 6 4 1 4 10B4 10H4 54 2 1 8 12A3 12D3 87 11 32 6A3 6C3 54 2 1 8 8 12G13 12D13 381 1 1 2 11012 11012 95 3 8 6A3 6C3 92 9 3 21 32 9G8 9B8 635 2 1 2 1A3 1D3 508 gt 5G5 505 95 3 3 3 4 9G8 9B8 54 2 180 12G7 1207 30 8 edam oS qs 54 2 1 8 8 12G10 12D10 11 1 7 16 6A4 6D4 100 3 15 16 21G8 21B8 76 2 3 1B12 1D12 11 9 0 469 6A4 6D4 101 6 4 21G8 21A8 794 3 1 8 1A12 1D12 d 31 30
8. Refer to table 4 for correct signal range codes Refer to the Maintenance section for disassembly and assembly procedures Changing to Reverse Action 1 Bypass the control valve and shut off the input signal line and the supply pressure line to the positioner 2 Loosen the four thumb screws on the underside of the positioner base and remove the cover 3 Two bellows posts are provided The posts are screwed into storage holes in the positioner base immediately above the CYLINDER and INSTRUMENT connections Unscrew these posts Note An optional restrictor see the top view in figure 6 can be found in place of one of the bellows mounting screws number 1 If so note the location of the restrictor and replace it in the same location during reassembly The restrictor has a hex head the mounting screws do not Remove the four mounting screws numbers 1 and 2 and lift out the bellows assembly Screw the bellows posts number 3 into the holes where the screws number 1 originally were Invertthe bellows and replace the screws numbers 1 and 2 Refertothe adjustment procedures to check operation of the positioner Make a notation on the action label key 43 figure 11 that the action of the positioner has been changed O ON DW f Replace the cover key 39 on the positioner Changing to Direct Action 1 Bypass the control valve and shut off the input signal line and the supply pressure line to the positioner 2 Remov
9. e Personal injury or property damage may result from fire or explosion if natural gas is used as the supply medium and preventive measures are not taken Preventive measures may include but are not limited to one or more of the following Remote venting of the unit re evaluating the hazardous area classification ensuring adequate ventilation and the removal of any ignition sources For information on remote venting of this positioner refer to page 8 e Check with your process or safety engineer for any additional measures that must be taken to protect against process media e If installing this into an existing application also refer to the WARNING at the beginning of the Maintenance section of this instruction manual The positioner is usually mounted on the actuator at the factory However if the positioner and actuator are ordered separately it is necessary to mount the positioner on the actuator Before mounting the positioner be certain the O ring key 33 figure 11 is in place in the cylinder top connection in the base of the positioner For appropriate actuator positioner combinations refer to the positioner type number descriptions given earlier in this instruction manual For 3570 3570C 3572 and 3573 positioners mount the positioner with two cap screws key 32 figure 11 If the range and bias springs are not installed in the positioner refer to the range spring and bias spring procedures in the Maintenance section
10. Diagram of Fisher 3570 Positioner with a 470 Pneumatic Piston Actuator BELLOWS REVERSED POSITION RELAY A SESE SUPPLY PRESSURE EXEEES TOP CYLINDER PRESSURE WZ BOTTOM CYLINDER PRESSURE GE NOZZLE PRESSURE A1067 1 IL As the input signal decreases the reverse action takes place The bellows contracts and as the beam pivots it covers the nozzle of relay B and uncovers the nozzle of relay A Through relay action the pressure below the piston increases and the pressure above the piston decreases to move the piston upward 21 3570 Positioners Instruction Manual September 2011 D200137X012 3572 and 3576 Valve Positioners Refer to the schematic diagram in figure 8 which shows the 3572 positioner mounted on a 472 pneumatic piston actuator For the 3576 positioner the principle of operation is identical to the 3572 positioner but the actuator can be a direct or reverse acting pneumatic diaphragm actuator Figure 8 Schematic Diagram of Fisher 3572 Positioner with a 472 Pneumatic Piston Actuator BELLOWS REVERSED cubes POSITION RANGE SPRING z BIAS SPRING CYLINDER SABIE foose RRR RRA RELAY A SUPPLY R RESTRICTION PISTON AAA INPUT SIGNAL PRESSURE SUPPLY PRESSURE RRRA TOP CYLINDER PRESSURE NOZZLE PRESSURE CR4006 A A1084 1 IL The pneumatic output signal from a control device is piped to the positioner bellows For explanation purposes assume thi
11. Light blue Red Light green Brown 49 Service tee iron For 3570C only 50 Pipe nipple pl steel For 3570C only 51 Pipe tee iron For 3570C only 52 Compression plug brass For 3570C only 2 req d 53 Adaptor brass For 3570C only 2 req d 54 Cylinder top gauge plastic case brass wetted parts For 3570 3571 3572 3576 triple scale 0 160 psi 0 1 1 MPa 0 11 bar 11B4040X032 dual scale 0 160 psi 0 11 kg cm 11B4040X062 Note Refer to figure 13 for keys 55 through 26E 55 Mounting bracket aluminum For 3571 3576 3577 56A Spring retainer pl steel For 3571 3576 3577 56B Setscrew pl steel For 3571 3576 3577 2 req d 56C Boot chloroprene For 3571 3576 3577 56D Spring wire pl steel For 3571 For 3576 3577 56E Endbearing For 3571 3576 3577 75 Tubing copper specify length 77 Elbow 3 8 inch brass specify quantity 78 Connector 3 8 inch brass specify quantity 84 Spring retainer spacer SST See table 8 Note Refer to figure 14 for keys 86 through 101 86 Spring cap assembly aluminum and SST 87 Machine screw pl steel 2 req d 88 Torsion spring steel 89 Extension cover aluminum 90 Machine screw pl steel 6 req d 91 Positioner cable Recommended spare parts Figure 13 Feedback Wire Assembly Typical with Fisher 3571 3576 and 3577 Positioners an MO UTI S pe x Y mm REVE
12. Vent 3 8 NPT All others 1 4 NPT Pressure Indications 3570C and 3570CP Positioners Tire valves accept standard pressure gauge chucks gauges not supplied All Other Types Gauges supplied per table 3 Bellows Pressure Rating Standard Bellows 3 4 bar 50 psig Optional Bellows 6 2 bar 90 psig Supply Pressure Maximum 10 4 bar 150 psig Minimum 2 4 bar 35 psig Supply Medium Air or Natural gas 2 Steady State Air ConsumptionG 0 54 normal m h 20 scfh with 6 9 bar 100 psig supply pressure Operative Ambient Temperature Limits With Nitrile O Rings and Diaphragms 34 to 71 C 30 to 160 F With Fluorocarbon O Rings and Diaphragms Optional 0 to 104 C 32 to 220 F Hazardous Area Classification Complies with the requirements of ATEX Group II Category 2 Gas and Dust C x u2ap Options E Restrictor high frequency filter for bellows Approximate Weight 2 7 kg 6 pounds without optional mounting bracket or actuator valve assembly Declaration of SEP Fisher Controls International LLC declares this product to be in compliance with Article 3 paragraph 3 of the Pressure Equipment Directive PED 97 23 EC It was designed and manufactured in accordance with Sound Engineering Practice SEP and cannot bear the CE marking related to PED compliance However the product may bear the CE marking to indicate compliance with other applicable European Community Directives NOTE S
13. on the 473 pneumatic piston actuator with valve bodies having push down to close PDTC action 3576 Discontinued Pneumatic valve positioner with one relay for use on direct acting pneumatic diaphragm actuators that require high operating pressures The 3576 positioner includes two pressure gauges to monitor input signal pressure and relay output pressure to the top of the actuator diaphragm The 3576 positioner is bracket mounted to the actuator yoke Actuator stem position feedback is provided through a wire from the actuator valve stem connector 3577 Discontinued Pneumatic valve positioner that is similar to 3576 positioner with the relay output pressure piped to the underside of the actuator diaphragm on reverse acting pneumatic diaphragm actuators Specifications Specifications for 3570 positioners are listed in table 1 Educational Services For information on available courses for 3570 positioners as well as a variety of other products contact Emerson Process Management Educational Services Registration P O Box 190 301 S 1st Ave Marshalltown IA 50158 2823 Phone 800 338 8158 or Phone 641 754 3771 FAX 641 754 3431 e mail education emerson com Instruction Manual 3570 Positioners D200137X012 September 2011 Installation Mounting and Connections Installation A WARNING e Always wear protective clothing gloves and eyewear when performing any installation operations to avoid personal injury
14. operate or maintain a 3570 positioner without being fully trained and qualified in valve actuator and accessory installation operation and maintenance To avoid personal injury or property damage it is important to carefully read understand and follow all the contents of this manual including all safety cautions and warnings If you have any questions about these instructions contact your Emerson Process Management sales office before proceeding Description 3570 pneumatic valve positioners are used with control valve assemblies to provide an accurate valve stem position that is proportional to the input signal received from a control device The input signal range can be 0 2 to 1 0 bar 3 to 15 psig 0 4 to 2 0 bar 6 to 30 psig or another pneumatic input signal range as required These positioners are normally used with pneumatic piston actuators However product types within the 3570 family can be used with pneumatic long stroke cylinder actuators or with pneumatic diaphragm actuators Valve Positioner Type Numbers 3570 Pneumatic valve positioner with two relays for use with Fisher 470 and 480 pneumatic piston actuators See figure 4 The positioner includes three pressure gauges to monitor input signal relay output pressure to the top of the actuator cylinder and relay output pressure to the bottom piston underside of the actuator cylinder The 3570 positioner is mounted on the top of the actuator cylinder The actuator s
15. part locations 1 Clean out the primary orifice on each relay by depressing the clean out plunger The plunger is located in the orifice assembly key 295 This operation runs a fine wire through the orifice to clear the hole 2 Check the nozzle key 29Q of each relay for plugging To clean swing the flapper key 12 away from the nozzle by loosening the screw that holds the flapper in place CAUTION The relays used in 3570C and 3570PC positioners use a locknut key 29P figure 12 on the nozzle key 29Q figure 12 If the nozzle is rotated when the locknut is tight damage to the relay diaphragm will result Always use a wrench on the nozzle to prevent it from turning while loosening or tightening the locknut Unscrew the nozzle and run a fine wire through it Do not enlarge the hole Also check the surface of the flapper for any accumulation of dirt or foreign materials 3 Check the bellows assembly for damage misalignment or leakage Also check all gasketed joints for leakage Use soap solution for leak detection 4 Check the beam for damage binding or rubbing against stationary parts Check the flexure strip screws key 17 for tightness 5 If the positioner operation has improved refer to the adjustment procedures 6 If the relays require replacement go to step 7 7 Unscrew the three machine screws key 31 from each relay and remove the relays 26 Instruction Manual 3570 Positioners D200137X012 September 2011
16. proper amount or method of air filtration or filter maintenance A WARNING To avoid personal injury or property damage resulting from the sudden release of pressure do not install the valve assembly where service conditions could exceed the limits given in this manual or on the appropriate nameplates Use pressure relieving devices as required by government or accepted industry codes and good engineering practices A WARNING If the supply pressure medium is corrosive make sure the tubing and instrument components that contact the corrosive medium are of suitable corrosion resistant material The use of unsuitable materials might result in personal injury or property damage due to the uncontrolled release of the corrosive media The connection marked SUPPLY see figure 4 must be provided with clean dry air or a noncorrosive gas Install a 40 micrometer filter and suitable equipment to dry the supply medium Establish a maintenance cycle to ensure that the regulator and filter are working correctly CAUTION The maximum allowable supply pressure to prevent damage to the components of the positioner actuator and valve is normally stamped on the actuator nameplate Use a suitable supply pressure regulator to reduce the supply pressure source to the value stamped on the nameplate wo 3570 Positioners Instruction Manual September 2011 D200137X012 If this maximum supply pressure value is not available use a supply pressure that does n
17. signal decreases the reverse action takes place The bellows contracts and as the beam pivots it covers the relay nozzle Through relay action the pressure on the underside of the piston increases to overcome the force exerted by the actuator spring and the piston moves upward Relay Operation Refer to figure 10 which shows a sectional view of a typical relay Supply pressure reaches the relay s through passages in the positioner base and is channeled to fixed restriction R and to point A between the supply valve B and the balancing O ring of the relay valve The fixed restriction is an integral part of the relay restriction plug and wire assembly G The orifice in nozzle F is larger than the fixed restriction This allows the supply pressure to bleed to atmosphere faster than it enters the unit through the fixed restriction when the beam flapper is away from the nozzle Assume that a change in the input signal causes the beam flapper to cover the nozzle of a relay The supply pressure flows through fixed restriction R into the chamber between the two relay diaphragms Due to the restricting effect of the flapper over the nozzle pressure builds up in the chamber between the diaphragms forcing the diaphragm head assembly E downward to open supply valve B allowing output pressure to increase The supply pressure flows past supply valve B to increase the output pressure to the actuator cylinder The cylinder pressure relay output pressure al
18. signal range codes contact your Emerson Process Management sales office 2 Use spring retainer spacer 1 803846172 for additional information see table 7 3 Use spring retainer spacer 1J223346172 for additional information see table 7 4 Use spring retainer spacer 1 803946172 for additional information see table 7 5 Use with high pressure bellows and spring retainer spacer 1 803946172 for additional information see table 7 6 Use with high pressure bellows 7 Use with high pressure bellows and spring retainer spacer 1J223346172 for additional information see table 7 8 For use with 480 12 or 480 15 size 20 actuators Adjustment Procedures Refer to figure 2 3570 positioners have three adjustments e The bias spring It is the zero adjustment which determines the starting point of the valve plug travel e The range spring It is the span adjustment which determines the full valve plug travel for a given input signal range The relay nozzle adjustment This adjustment determines the steady state positioner output pressure To illustrate the use of the various adjustments assume that the positioner has been repaired or has become completely out of adjustment Assume also that the input signal range is 0 2 to 1 bar 3 to 15 psig Proceed as follows 1 Make sure the input signal range and the valve travel stamped on the nameplate agree with the present operating conditions 2 Loosen the four thumb screws on the und
19. tire valve adaptor keys 50 51 and 53 figure 12 into the INSTRUMENT connection Connect the input signal line to the pipe tee Refer to the adjustment procedures 27 3570 Positioners Instruction Manual September 2011 D200137X012 Range Spring Disassembly Unless otherwise directed key numbers refer to figures 11 and 12 A WARNING The following procedure requires taking the positioner actuator and control valve assembly out of service To avoid personal injury or property damage caused by uncontrolled process pressure provide a temporary means of control for the process before taking the assembly out of service Before removing the input signal and supply pressure connections from the positioner remove the input signal and supply pressure sources from the connections The sudden release of pressure can cause personal injury or property damage 1 Bypass the control valve and shut off the input signal and the supply pressure lines to the positioner 2 Remove the positioner cover key 39 3 Loosen the spring lock see figure 2 that holds the range spring key 18 to the beam 4 Disconnect the other end of the range spring by performing one of the following steps For 3570 3570C 3572 and 3573 positioners use a screwdriver to remove the spring retainer key 19 figure 2 from the piston rod extension For 3570P and 3570PC positioners see figure 12 remove the screws key 87 from the cap key 86 and rot
20. 0A4 10H4 76 2 3 1G1 1D1 177 8 7 13G3 13B3 i 19 3 4 8G10 8B10 11 1 7 16 10A2 10H2 79 4 3 1 8 4G1 4C1 254 1 AFB ABS 12 7 1 2 10A2 10D2 15 9 5 8 3G2 3H2 28 6 1 1 8 9G8 9B8 203 2 8 18G8 18B8 i 38 1 1 1 2 9F8 9B8 206 4 8 1 8 18G8 18B8 82 6 3 1 4 4G1 4C1 41 3 1 5 8 9F8 9B8 84 1 3 5 16 4G3 4D3 SIGNAL RANGE A A ee ie 85 7 3 3 8 4G1 4H1 1 2 to 2 0 bar 18 to 30 psig 254 1 264 2D4 88 9 3 1 2 1G12 1D12 50 8 2 1568 15B8 26 2 13 32 2G4 SHA i eee SH 28 am a4 2 1 8 1561 15B1 19 3 4 5G10 5D10 28 6 1 1 8 265 2D5 54 2 1 8 8 15F5 15B5 28 6 1 1 8 5G8 5D8 58 7 2 5 16 15G1 15C1 38 1 1 1 2 8F5 8C5 92 9 321 32 4G1 4D1 635 2 1 2 15F1 15A1 50 8 2 4F8 4D8 318 1 1 4 265 2D5 95 3 3 3 4 4G1 4D1 73 2 7 8 1468 4B8 76 2 3 9G8 9H8 35 1 3 8 2612 2D12 AS d T bean a 38 1 1 1 2 5G5 5D5 i 397 EAE 5G5 5D5 127 5 6 21A5 21H5 76 2 3 14G8 14B8 79 4 3 1 8 9F8 9C8 41 3 1 5 8 5G5 5D5 79 4 3 1 8 14G8 14B8 82 6 3 1 4 9F8 9C8 i 1334 5 1 4 21413 21013 82 6 3 1 4 14G8 14B8 101 6 4 6 14E8 14D8 142 9 5 5 8 6 16G1 16D1 87 3 3 7 16 14G8 14B8 104 8 4 1 8 16F8 16D8 46 1 13 16 565 5D5 5 88 9 3 1 2 14G8 14B8 127 50 14F1 14D1 aaa B usta wants 124 60 Meee e 50 8 2 B 12c8 128 4778 79 21612 21p12 905 3 9 16 20F8 20A8 133 4 5 1 4 19F3 19D3 54 2 1 8 1267 12D7 96 8 3 13 16 14G8 14B8 165 6 1 2 5 13F3 13B3 54 2 1 8 8 12613 12D13 203 2 ga 21E12 21D12 101 6 4 14G8 14A8 206 4 8 1 8 5 18F1 18D1 1 For 3570P
21. 1 mm 2 INCH TRAVEL 2 SIZE 40 38 mm 1 1 2 INCH TRAVEL 5 SIZE 100 51 mm 2 INCH TRAVEL 3 SIZE 60 38 mm 1 1 2 INCH TRAVEL 6 SIZE 130 76 mm 3 INCH TRAVEL 2K5255 R A1285 2 IL Instruction Manual 3570 Positioners D200137X012 September 2011 Table 4 Fisher 3570 Signal Range Codes SIGNAL RANGE SIGNAL RANGE SIGNAL RANGE SIGNAL RANGE 0 to 1 0 bar 0 to 15 psig 0 2 to 0 6 bar 3 to 9 psig 0 2 to 1 0 bar 3 to 15 psig 0 2 to 1 0 bar 3 to 15 psig Travel Code Travel Code Travel Code Travel Code mm Inches Direct Reverse mm Inches Direct Reverse mm Inches Direct Reverse mm Inches Direct Reverse 54 2 1 8 4G1 4B1 14 3 9 16 6G3 6D3 66 7 2 5 8 15G13 15A13 54 M 4G8 4B8 190 5 7 1 2 1965 19C5 REESE IR ENEMIES z 196 6 7 3 4 19G3 19B3 20 6 13 16 761 781 826 3 1 4 14G8 14A8 s EU HS de 198 9 7 13 16 19G8 1988 26 2 1 1 32 5A12 5D12 85 7 3 3 8 14G8 14A8 58 7 2 5 16G 962 9p2 203 2 8 1968 19B8 595 2 11 32 963 9B3 206 4 8 1 8 19G12 19B13 28 6 1 1 8 5C8 5C8 88 9 3 1 2 14G8 14A8 693 2 318 Bud SES SIGNAL RANGE 30 2 1 3 16 12A13 12C13 96 8 3 13 16 14G8 14A8 38 1 1 1 2 8G5 885 1016 4 14G8 1448 0 2 to 1 8 bar 3 to 27 psig 39 7 1 9 16 8G12 8B12 104 8 4 1 8 13G8 13A8 63 5 2 1 2 9G3 9B3
22. 2 50 8 2 15G8 15A8 Ed 21 8 15A1 151 173 6 13 16 20G3 20A3 54 2 1 88 1565 ae 44 5 1 3 4 8G8 8B8 177 8 7 20G5 20C5 76 2 3 965 9C5 587 25 16 1561 1541 46 1 13 16 4G8 4C8 181 8 7 5 322 9 13G1 13A1 101 6 4 21G8 21B8 47 6 1 7 8 4G7 4B7 188 1 7 13 32 20G3 20B3 104 8 4 1 8 16G8 16B8 63 5 2 12 1563 1543 508 2 4G8 4B8 1524 64 1361 13B1 Continued 13 3570 Positioners Instruction Manual September 2011 D200137X012 Table 4 Fisher 3570 Signal Range Codes Continued SIGNAL RANGE SIGNAL RANGE SIGNAL RANGE SIGNAL RANGE 0 4 to 1 2 bar 6to 18 psig 0 4 to 2 0 bar 6 to 30 psig 0 6to 1 0 bar 9 to 15 psig 0 6 to 1 0 bar 9 to 15 psig Travel Code Travel Code Travel Code Travel Code mm Inches Direct Reverse mm Inches Direct Reverse mm Inches Direct Reverse mm Inches Direct Reverse 165 1 6 1 2 5 13G3 13A3 57 1 2 1 4 1261 12D1 104 8 4 1 8 14G8 14B8 206 4 8 1 8 1965 19 5 8 7 11 32 5A13 5D13 117 5 4 5 8 13G3 13B8 58 4 2 3 12G3 1203 11 1 7 16 5G5 5B5 SIGNAL RANGE 60 3 2 3 8 12A10 12D10 12 7 1 2 12G13 12B13 0 4 to 2 0 bar 6 to 30 psig 15 9 5 8 868 8B8 127 50 13G12 13B12 psig 17 5 11 16 8G8 8C8 1524 6 1363 13B3 63 5 2 1 2 1G3 1H3 155 6 6 1 8 13G4 13B4 60 7 Pos 169 103 165 1 6 1 2 13G12 13B12 6 4 1 4 17H4 17H4 69 9 2 3 4 1G4 1D4 l 9 5 3 8 6 1
23. 2 1 16 40 1 9 16 1J223346172 57 2 1 4 44 1 3 4 1J803846172 94 3 11 16 81 3 3 16 1P3957X0012 97 3 13 16 84 3 5 16 1J803946172 1 Refer to figure 2 2 The spacer number is the first 6 characters of the part number and is stamped on the part Changing Positioner Action The instructions given below are to be used after the springs have been changed or if no spring change is required Numbered parts mentioned in this section are shown in figure 6 unless otherwise noted Figure 6 Bellows Mounting for Direct and Reverse Action RESTRICTOR BELLOWS TOP VIEW ceva WITH OPTIONAL RE STRICTOR 4 2 BEAM BELLOWS BASE PEDESTAL DIRECT REVERSE ACTION ACTION 1 MOUNTING SCREW 2 MOUNTING SCREW 3 BELLOWS POST A1088 1 IL A WARNING The following procedures require taking the positioner actuator and control valve assembly out of service To avoid personal injury or property damage caused by uncontrolled process pressure provide a temporary means of control for the process before taking the assembly out of service Before removing the input signal and supply pressure connections from the positioner remove the input signal and supply pressure sources from the connections The sudden release of pressure can cause personal injury or property damage 17 3570 Positioners Instruction Manual September 2011 D200137X012 Note Changing the positioner action might require changing the bias spring and or the spring retainer
24. 573 positioners Refer to figure 2 for location of parts The signal range codes in table 4 are based on the following applications Codes for valve travels up to and including 50 mm 2 inches are used for actuators that have a 50 mm 2 inch maximum travel If the actuator maximum travel is greater than 50 mm 2 inches an additional retainer spacer key 235 see figure 2 is required Refer to the parts list for the additional spring retainer spacer key 235 part number Codes for valve travels greater than 50 mm 2 inches up to and including 105 mm 4 1 8 inches are used for actuators that have a 105 mm 4 1 8 inch maximum travel except the 480 12 or 480 15 Size 20 actuators which have a 54 mm 2 1 8 inch maximum travel If the actuator maximum travel is greater than 105 mm 4 1 8 inches an additional retainer spacer are required Refer to the parts list for the additional spring retainer spacer key 235 part numbers Codes for valve travels greater than 105 mm 4 1 8 inches up to and including 206 mm 8 1 8 inches are for actuators that have a 206 mm 8 1 8 inch maximum travel If the valve travel is 105 mm 4 1 8 inches or less two additional spring retainer spacers are required Refer to the parts list for the additional spring retainer spacer key 235 part numbers If the input signal range and travel do not match any of the selections in table 4 consult your Emerson Process Management sales office for informati
25. 87 Brazil i Chatham Kent ME4 4QZ UK gt Dubai United Arab Emirates es Singapore 128461 Singapore www Fisher com EMERSON Dr aS A maement GFisher Controls International LLC 1974 2011 All Rights Reserved Process Mana E ement
26. DER O RING KEY 33 BELLOWS POSTS ZERO ADJUSTMENT TOP PRESSURE INSTRUMENT CONNECTION CYLINDER BOTTOM INPUT SIGNAL CONNECTION 1 4 NPT 1 4 NPT BACK VIEW wao25 iL FRONT VIEW W4027 IL NOTES LI gt ON SOME CONSTRUCTIONS TWO NOZZLES AND ADJUSTMENTS ARE REQUIRED Vent A WARNING Personal injury or property damage could result from fire or explosion of accumulated gas or from contact with hazardous gas if a flammable or hazardous gas is used as the supply pressure medium The positioner actuator assembly does not form a gas tight seal and flammable or hazardous gas could leak from the assembly Therefore if the assembly is enclosed install a remote vent line from the enclosure However a remote vent pipe alone cannot be relied upon to remove all hazardous gas Use adequate ventilation and necessary safety measures Vent line piping should comply with local and regional codes and should be as short as possible with adequate inside diameter and few bends to reduce case pressure buildup CAUTION When installing a remote vent pipe take care not to overtighten the pipe in the vent connection Excessive torque will damage the threads in the connection Note The vent connection is always plugged with a pipe plug for 3570P and 3570PC positioners when mounted on 490 actuators Instruction Manual 3570 Positioners D200137X012 September 2011 The connection marked VENT see figure 4 should be left open if the act
27. Instruction Manual D200137X012 3570 Positioners September 2011 Fisher 3570 Pneumatic Valve Positioners Contents Introd ctioriz Luces ee vurr t Rex eee RR e 1 Scope of Manual 00 cece ee ee eee 1 Description ipud deterret NE ANR 2 Valve Positioner Type Numbers 2 Specifications cece eee eee eee reee 4 Educational Services e eee eee eens 4 Installation Mounting and Connections 5 Installation ses erase ce cada eee a Mapa ER EDO 5 Diagnostic Test Connections Optional 6 Connections ese Sie hace ee n a ele a 7 PiplngiSIZes i teed Pate ea AE EE aed reas 7 Ment 2 hatter ehe e reir ERE REESE 8 Supply Pressure Connections 9 Cylinder Connections 05 10 Instrument Connection 10 Operating Information 00000 11 Initial Adjustments 00 c cece eee eee ees 11 Signal Range Codes 00 cece eee eee 11 Frequency Response ee eee ee ee eee 12 Adjustment Procedures eee eee 14 Changing Positioner Action 17 Split Range Operation suse 19 Initial Range Spring Extension Procedure for 3570P and 3570PC Positioners 19 Principle of Operation 2 eee e eee 21 3570 3570C 3570P 3570PC and 3571 Valve Positioners 045 21 3572 and 3576 Valve Positioners 22 3573 and 3577 Valve Positioners
28. Les one 12 7 1 2 7G1 7c 82 6 3 1 4 4Gl 4C1 14 8 0 582 5G4 5C4 889 3 1 2 4G4 4D4 159 5 8 763 783 1016 4 4G MAI 1016 4 4G1 481 101 6 4 1G1 1D1 104 8 4 1 8 1668 16B8 104 8 4 1 8 161 1C1 108 4 1 4 4 16G13 16D13 17 5 11 16 7G4 7B4 111 1 4 3 8 2 16G1 16C1 104 8 4 1 8 4G5 4D5 SIGNAL RANGE 19 3 4 7G4 704 114 3 4 1 2 6 20A8 20C8 114 3 4 1 20 21413 21D13 0 2 to 0 6 bar 3 to 9 psig 20 6 13 16 7A5 7B5 127 5 6 21M 21D4 22 2 7 8 565 5C5 1334 5 1 4 6 21A3 21D3 11 1 7 16 565 5A5 23 8 15 16 8G5 8B5 116 8 4 64 16G4 16C4 1524 65 16G3 16C3 12 7 1 2 8G5 8A5 117 5 4 5 8 2 16G3 16B3 15 9 5 8 8G10 8A10 120 7 4 3 4 2 16G3 16B3 190 5 7 1 2 2 21G1 21D1 19 3 4 8G13 8A13 25 4 1 865 8B5 127 5 5 14G1 14C1 203 2 84 21G10 21D10 22 2 7 8 8G8 8B8 27 1 1 16 8G12 8812 1334 5 1 46 16G10 16C10 28 6 1 1 8 8G12 8B12 SIGNAL RANGE 31 8 1 1 4 8G12 8B12 0 4 to 1 2 bar 6 to 18 psig 25 4 1 4G8 4B8 33 3 1 5 16 8G10 8C10 139 7 5 1 20 14G1 14B1 27 1 1 16 4G8 4B8 152 4 e 13G3 13A3 28 6 1 1 8 9G8 9A8 155 6 6 1 8 5 13G3 13A3 19 3 4 5G5 5C5 35 1 3 8 9G8 9A8 35 1 3 8 8G10 8B10 1651 6 1 2 5 13G3 13A3 28 6 1 1 8 8G12 8B12 381 1 1 2 9G8 9A8 36 5 1 7 16 8G13 8B13 169 9 6 11 16 20G3 20B3 38 1 1 1 2 868 8B8 381 1 1 2 8G13 8B13 d iz Aes a 39 7 1 9 16 8G8 8C8 x AE 35988 ae 958 413 1 5 8 868 888 171 5 6 3 45 13G5 13A5 54 2 1 8 8 9612 9B1
29. NER SPACER IF REQUIRED KEY 235 LOCKNUTS PISTON ROD EXTENSION OPTIONAL EFFECTIVE LENGTH EFFECTIVE LENGTH OVERALL LENGTH SPRING SPRING RETAINER SPACER RETAINER NOTE 1 BOTTOM OF BIAS SPRING POST THREAD MUST BE POSITIONED AS SHOWN FOR PROPER POSITION OF E RING TRAVEL STOPS AJ7270 C 1H8907 C 1J2233 C B2402 IL Diagnostic Test Connectors Optional Diagnostic test connectors are available from the factory when the unit is ordered or they can be installed on an existing control valve assembly in the field These connectors are especially useful for quick connections when using the FlowScanner valve diagnostic system The FlowScanner is a portable microprocessor based diagnostic and calibration system specifically designed for use with pneumatically operated control valves To support diagnostic testing of the control valve assembly the connectors piping and other hardware can be installed between the 3570 positioner and the actuator A typical connector installation is shown in figure 3 For connectors refer to the FlowScanner Diagnostic Connection kit listing in the parts list The hardware used includes 3 4 NPT pipe nipple pipe tee and pipe bushings with a 1 8 NPT pipe bushing for the connector The connector consists of 1 8 NPT body and body protector see figure 3 1 Before assembling the pipe nipple pipe tee pipe bushings actuator piping and connector body apply sealant to a
30. RSE BOOT FOR TRAVELS OVER 50 8 mm D 2iNCHES TE RELAY BLANK AND SCREWS KEY 42 AND 42 ARE INSTALLED WHERE SHOWN FOR 3573 AND 3577 POSITIONERS FOR 3572 AND 3576 POSITIONERS THESE PARTS ARE INSTALLED ON THE OPPOSITE SIDE OF THE POSITIONER 40A9335 C A3230 IL Key Description 92 Actuator cable 93 Cable strap brass 94 Cap screw pl steel 3 req d 95 Hex nut pl steel 96 Cable spool acetal plastic 97 Spring guide aluminum 98 Warning plate 99 Self tapping screw pl steel 100 Cap screw pl steel 2 req d 101 Positioner extension assembly aluminum 102 Washer SST For 3572 3576 1 req d For 3570 3571 3573 3577 2 req d 235 Springretainer spacer SST 104 8 mm 4 1 8 inches maximum actuator travel 54 0 mm 2 1 8 inches or less valve travel 206 4 mm 8 1 8 inches maximum actuator travel between 54 0 mm 2 1 8 inches and 104 8 mm 4 1 8 inches valve travel 2 different spacers req d 206 4 mm 8 1 8 inches maximum actuator travel less than 54 0 mm 2 1 8 inches valve travel 2 req d 33 3570 Positioners September 2011 Instruction Manual D200137X012 Figure 14 Fisher 3570P and 3570PC Positioner 34 100 z d 89 VIEW A A 90 TYPICAL MOUNTING O LL FOR 3570P La AND 3570PC x oy ioi E fe
31. aintenance section of this manual In some cases it is necessary to add an additional spring retainer spacer or change from the standard bellows to the optional high pressure bellows Table 4 footnotes indicate the use of an additional spring retainer spacer or high pressure bellows Use the code from table 4 while referring to tables 5 6 and 7 to determine the part numbers for the range spring bias spring and spring retainer Unless otherwise specified use the standard bellows Also no spring retainer spacer is required unless the spacer is specified in the footnotes of table 4 Frequency Response Figure 5 shows how a 3570 or 3570C positioner with 470 or 480 actuator responds when the input signal pressure is cycled at a small amplitude 3 to 5 percent and at an increasing frequency Assume the cycling input signal and the movement of the actuator rod are represented by sine waves As the actuator rod is forced to move faster its motion begins to fall behind the input signal in both time shown as phase lag and amplitude shown as normalized gain Figure 5 Typical Frequency Response for a Fisher 3570 or 3570C Positioner Mounted on a 470 or 480 Actuator d 0 8 0 6 0 4 PHASE LAG DEGREES NORMALIZED GAIN 004 6801 2 4681 2 4 681 2 4 6 810 FREQUENCY HERTZ 1 SIZE 30 19 mm 3 4 INCH TRAVEL 4 SIZE 80 5
32. ate the cap clockwise to remove all torsion spring force Disconnect the actuator cable key 92 from the cable strap key 93 Unhook the positioner cable key 91 from the cable spool key 96 For 3571 3576 and 3577 positioners loosen the set screw found in the spring retainer key 56A figure 13 and remove the spring wire key 56D from the retainer 5 Remove the range spring from the beam by rotating the range spring counter clockwise Assembly 1 Install the new range spring For 3570 3570C 3572 and 3573 positioners also install the spring retainer See figures 2 or 11 2 Reconnect the range spring to the piston rod extension 3570 3570C 3572 and 3573 positioners or the feedback wire 3571 3576 and 3577 positioners figure 13 For 3570P and 3570PC positioners install the positioner cable key 91 figure 14 in the range spring so that the large ball on the cable seats in the conical portion of the spring 3 Install the spring lock key 20 figure 11 Adjust the positioner per instructions in the adjustments procedures The action of the positioner can be reversed in the same manner as described in the changing positioner action procedures However before attempting to reverse the action see table 4 or consult your Emerson Process Management sales office to determine if any different parts are required 28 Instruction Manual 3570 Positioners D200137X012 September 2011 Bias Spring Disassembly 1 Refer t
33. ct action the signal range code from table 4 is 6G3 The appropriate bias spring is indicated by G 2 It is necessary to add the bias spring seat key 8 to a unit when changing from an extension type spring key 9 to a compression type spring key 48 3 Compression type bias spring key 48 4 Extension type bias spring key 9 Table 7 Spring Retainer OVERALL LENGTH 2 EFFECTIVE LENGTH 2 CODE NUMBER PART NUMBERO mm Inches mm Inches 1 57 2 15 64 44 1 47 64 1H8907X0012 2 53 2 5 64 40 1 37 64 1H8908X0012 3 50 1 63 64 38 1 31 64 1H8909X0012 4 48 1 7 8 35 1 3 8 1H8911X0012 5 43 1 11 16 30 1 3 16 1H8910X0012 7 25 31 32 12 15 32 1H8912X0012 8 22 7 8 10 3 8 1H8552X0012 10 35 1 3 8 22 55 64 1H8913X0012 12 38 1 1 2 25 1 1J3572X0012 13 29 1 1 8 16 21 32 1J9796X0012 1 Code numbers 6 9 and 11 are not used 2 Refer to figure 2 3 The spring retainer code number is the second number given in each signal range code listed in table 4 For example for a signal range of 0 to 1 0 bar 0 to 15 psig an actuator travel of 14 3 mm 9 16 inch and direct action the signal range code from table 4 is 6G3 The appropriate spring retainer is indicated by 3 16 Instruction Manual 3570 Positioners D200137X012 September 2011 Table 8 Spring Retainer Spacer OVERALL EFFECTIVE LENGTH 1 LENGTH PART NUMBER 2 mm Inches mm Inches 41 1 5 8 29 1 1 8 1L2069X0012 52
34. e the positioner cover by loosening the four thumb screws on the underside of the base Note An optional restrictor see the top view in figure 6 can be found in place of one of the bellows mounting screws number 1 If so note the location of the restrictor and replace it in the same location during reassembly The restrictor has a hex head the mounting screws do not 3 Remove the four mounting screws numbers 1 and 2 bellows and bellows posts number 3 4 Invert the bellows and reinstall it in the positioner Secure the bellows with the four screws numbers 1 and 2 Screw the bellows posts into the storage holes provided in the base immediately above the cylinder and instrument connections 5 Refer to the adjustment procedures to check the operation of the positioner If the input signal range has not been changed adjustment of the range spring might not be necessary Instruction Manual 3570 Positioners D200137X012 September 2011 6 Make a notation on the positioner action label key 43 figure 11 that the action of the positioner has been changed 7 Replace the cover key 39 on the positioner Split Range Operation 3570 valve positioners are suitable for split range operation In split range operation two or more control valves are operated by one output signal from a single control device When two control valves are split ranged one valve strokes fully with one half the input signal range and the second valve str
35. el 2 req d For all types except 3570C 33 O ring Nitrile std const 1C853806992 29 Relay assembly See Repair Kits Fluorocarbon hi temp const 1C8538X0052 Recommended spare parts 31 3570 Positioners September 2011 Instruction Manual D200137X012 Figure 12 Fisher 3570C Positioner EXTENSION TYPE BIAS SPRING ASSEMBLY 40A8972 B B1841 IL Key 34 35 36 37 38 40 41 42 32 Description Part Number Spring anchor SST Machine screw pl steel 2 req d Pipe plug pl steel Cover gasket Cork std const 1H853804042 Silicone hi temp const 1H853804142 Cover screw pl steel 4 req d Cover aluminum Washer brass plated 2 req d Relay blank aluminum see figure 14 For 3572 3573 3576 3577 Screw SST see figure 14 For 3572 3573 3576 3577 3 req d PART 22 DIRECT ACTION Key 43 45 46 47 SECTION OF PART 29 2l 22 I5 43 i e src 52 Tl Ud 3l Description Label paper For direct acting units For reverse acting units Cylinder tubing assembly copper For 3570 3571 3573 3577 Bolt brass w o restrictor assembly 2 req d w restrictor assembly 1 req d Restrictor assembly SST Recommended spare parts Instruction Manual D200137X012 3570 Positioners September 2011 Key Description Part Number 48 Bias spring compression type pl steel Color Code Silver
36. erside of the positioner base and remove the cover 3 Provide a means for varying the input signal pressure from zero to 0 07 or 0 14 bar 1 or 2 psig above the higher value of the input signal range see table 1 Provide an accurate means of measuring the input signal pressure 14 Instruction Manual 3570 Positioners D200137X012 September 2011 Check the accuracy of the positioner instrument pressure gauge see figure 4 The gauge accuracy is 0 04 bar 0 6 psig on a 0 to 2 bar 0 to 30 psig gauge and 0 08 bar 1 2 psig ona 0 to 2 bar 0 to 60 psig gauge This accuracy is measured at the mid point of the full range of the scale 4 Set the input signal pressure at the mid point of its range 0 6 bar 9 psig in this example Observe the valve travel indicator scale attached to the yoke The indicator disk should be somewhere between the open and closed positions 5 Loosen the locknut directly below the bias spring seat see figure 2 and adjust the bias spring up or down until the valve travel indicator disk shows that the valve plug is somewhere between the open and closed positions Upward movement of the bias spring adjustment causes downward travel of the valve stem 6 For positioners with two relays 3570 3570C 3570P 3570PC and 3571 positioners observe the relay output pressures If the cylinder gauges are present as shown in figure 4 read the cylinder top and cylinder bottom gauges or use clip on test pressure ga
37. f the positioner cable key 91 into the slot of the smaller portion of the cable spool key 96 Wind the cable on the spool until the coils of the range spring key 18 figure 11 are slightly separated Be certain the cable is wound so that it comes off the side of the spool opposite the access opening and that the cable cannot cross itself on the spool 2 Install the ball end of the actuator cable key 92 into the slot of the large portion of the spool that is closer to the access opening Wrap the cable on the spool as many times as possible then bring the cable out through the bottom of the positioner extension Be certain the cable is wound so that it comes off the side of the spool opposite the access opening and that the cable cannot cross itself on the spool Attach the cable to the cable strap key 93 leaving approximately a 0 8 mm 1 32 inch gap between the cable eye and cap screw head key 94 3 With the actuator piston rod completely retracted and the range spring coils slightly separated attach the cable strap to the actuator feedback arm Use the set of cable strap holes closest to the range spring Turn the spring cap key 86 one turn counterclockwise and install one cap screw key 87 4 Adjustthe range spring key 18 figure 11 to obtain full travel for the input signal range span adjustment Refer to step 7 of the adjustment procedures Adjustment of the bias spring zero adjustment does not need to be done at this time
38. gnal the input signal range is marked on the nameplate key 23 Instruction Manual 3570 Positioners D200137X012 September 2011 figure 11 The maximum allowable input signal for positioners with standard or optional bellows is in table 1 bellows pressure rating The instrument connection is made at the factory when a complete control valve assembly with a valve mounted control device is ordered Otherwise make field connections to the positioner from an appropriate control device Refer to table 1 and the nameplate for input signal pressure ranges Operating Information Initial Adjustments Normally no adjustments are necessary upon initial installation The positioner is set at the factory for the travel input signal range and action specified in the order Adjustment is necessary when operating conditions are changed when the unit has been dismantled and reassembled or when the control valve travel does not correspond to the desired input signal range If the operating conditions have not changed but the positioner requires adjustment refer to the adjustment procedures in this section If the operating conditions have changed first refer to the signal range code descriptions then referto the adjustment procedures Signal Range Codes The range spring and the bias spring are matched to a specific input signal range and length of travel Also the spring retainer length is matched to the application on the 3570 3570C 3572 and 3
39. ing see figure 2 up or down until the valve travel is at the starting point 8 Loosen the spring lock see figure 2 and slowly increase the input signal toward the high end of the input signal range 1 0 bar 15 psig in this example If the valve travel is less than its expected range increase the travel by adjusting the range spring counterclockwise If the valve travel reaches the end of its expected range with an input signal less than the high value of the input signal range decrease the travel by adjusting the range spring clockwise 9 Repeat steps 7 and 8 until the valve plug or travel indicator action corresponds to the input signal requirements of the application 0 2 to 1 0 bar 3 to 15 psig in this example 10 Lock the range spring and the bias spring seat in position The positioner is then ready for operation 11 If the positioner is unstable and adjustment does not correct the problem it might be due to unwanted fluctuations in the input signal A restrictor assembly key 47 figure 11 can be installed in the input signal circuit to dampen these fluctuations The restrictor might help to minimize instability To take the restrictor out of service exchange the location of the restrictor with that of the bellows mounting screw key 46 figure 11 12 Replace the cover key 39 on the positioner 3570 Positioners Instruction Manual September 2011 D200137X012 Table 5 Range 1 2 Code Number Par
40. is bracket mounted to the side of the actuator Actuator stem position feedback is provided through a wire from the actuator valve stem connector 3572 Pneumatic valve positioner with one relay The 3572 positioner is normally used on the 472 pneumatic piston actuator mounted on valve bodies having push down to open PDTO action The positioner includes two pressure gauges to monitor input signal pressure and relay output pressure to the top of the actuator cylinder The 3572 positioner is mounted on the top of the actuator cylinder Actuator stem position feedback is provided through an extension of the actuator piston rod Instruction Manual D200137X012 3570 Positioners September 2011 Table 1 Specifications Available Configurations See the positioner type number descriptions given above Input Signal Standard Ranges 0 2 to 1 0 bar 3 to 15 psig or 0 4 to 2 0 bar 6 to 30 psig Optional Ranges As desired within the limits of the bellows Split Ranges Use one half of either standard range when two control valves are operated by one output signal form a single control device Output Signal Type Pneumatic pressure as required to maintain the correct valve stem position and seat load Action Field reversible between direct and reverse Resolution 0 2 of instrument pressure span Repeatability 0 3 of total stroke or instrument pressure span Frequency Response See figure 5 Pressure Connections
41. is closest to the tapped holes in the feedback arm 8 Refer to the positioner adjustment procedures 20 Instruction Manual 3570 Positioners D200137X012 September 2011 Principle of Operation 3570 3570C 3570P 3570PC and 3571 Valve Positioners Refer to the schematic diagram in figure 7 The pneumatic output signal from a control device is piped to the positioner bellows For explanation purposes assume this signal has increased The bellows expands and moves the beam which pivots around a fixed point and simultaneously uncovers the nozzle of relay B and covers the nozzle of relay A The nozzle pressure in relay A increases due to the restriction created by the beam covering the nozzle Through relay action the pressure to the top of the piston increases At the same time relay B reacts to the change in beam position to decrease the pressure to the underside of the piston These unbalanced pressures move the actuator piston down In the 3570 and 3570C positioners the piston movement is fed back to the beam by means of a range spring which is connected to the beam and to the piston rod extension In the 3570P 3570PC and 3571 positioners the feedback is provided to the range spring by a cable or wire that is connected to the actuator valve stem connector The downward movement of the piston rod extension extends the range spring until the torque on the beam balances the torque exerted by the instrument bellows Figure 7 Schematic
42. ll threads 2 Position the pipe tee connector body and body protector for easy access when doing diagnostic testing Instruction Manual D200137X012 3570 Positioners September 2011 Figure 3 Diagnostic Test Connections PIPE NIPPLE TO INSTRUMENT CONNECTION PIPE NIPPLE TO SUPPLY CONNECTION FROM 377 TRIP VALVE 377 TRIP VALVE PIPE NIPPLE OPTIONAL TO BOTTOM CYLINDER PIPE TEE ACTUATOR STEM REQUIRED WHEN AL PURCHASED WITH GAUGE Connections Piping Sizes All pressure connections on 3570 positioners are 1 4 NPT internal Use 3 8 inch pipe or tubing for supply cylinder bottom connection and instrument input signal connections For the remote vent pipe if one is required use 19 mm 3 4 inch minimum inside diameter pipe for runs up to 6 09 meters 20 feet For vent piping runs from 6 09 to 30 5 meters 20 to 100 feet use 25 4 mm 1 inch minimum inside diameter pipe Refer to figure 4 for the locations and sizes of connections 3570 Positioners Instruction Manual September 2011 D200137X012 Figure 4 Typical Location of Fisher 3570 Positioner Parts and Adjustments RANGE SPRING CLEAN OUT BELLOWS SPAN ADJUSTMENT PLUNGER CYLINDER BOTTOM PRESSURE VERTICAL HORIZONTAL RELAY RELAY INSTRUMENT PRESSURE SUPPLY CONNECTION NOT SHOWN 1 4 NPT RELAY NOZZLE OUTPUT PRESSURE ADJUSTMENT C 1 CYLINDER VENT CONNECTION TOP CONNECTION 3 8 NPT CYLIN
43. number is stamped on the nameplate Always refer to the serial number when corresponding with your Emerson Process Management sales office regarding spare parts or technical information When ordering replacement parts also specify the complete 11 character part number from the parts kits or parts list information A WARNING Use only genuine Fisher replacement parts Components that are not supplied by Emerson Process Management should not under any circumstances be used in any Fisher instrument Use of components not supplied by Emerson may void your warranty might adversely affect the performance of the valve and could cause personal injury and property damage 29 3570 Positioners September 2011 Instruction Manual D200137X012 Parts Kits Note Parts kits for 3570 positioners contain the gaskets diaphragms and O ring seals as specified by the type and temperature limitations Parts are for 3570 3570C 3570P and 3570PC positioners Positioner Repair Kits Description Part Number Positioner kit includes Keys 3 12 29 qty 2 30 33 and 37 Forthe 3570 R3570X00022 Forthe 3570C R3570CX0022 For the 3570C hi temp const R3570CX0H32 Diagnostic Test Connection Kits Note Part numbers are shown for recommended spares only For part numbers not shown contact your Emerson Process Management sales office Kit includes pipe tee pipe nipple pipe bushings connector body and body protector used with the FlowScanner
44. o figure 2 Remove the top E ring travel stop 2 Loosen the locknut securing the bias spring seat in place Then rotate the adjusting screw until the spring force is at a minimum 3 Loosen the locknut that secures the bias spring post to the positioner base Using a screwdriver in the slot in the top of the post unscrew the post from the base 4 Tilt the bottom of the post out and remove the post from the beam 5 Remove the locking nuts and the spring seat from the bias spring post Assembly 1 Install the new bias spring spring seat and locking nuts on the bias spring post 2 Replace the bias spring post into the beam and install the top E ring travel stop 3 Install the bias spring post into the base Be certain that the bottom of the post thread is positioned as shown in figure 2 Ensure that the beam does not rub on the post 4 For 3570P and 3570PC positioners go to the initial range spring extension procedures for 3570P and 3570PC positioners 5 Adjust the positioner as described in the adjustments procedures The action of the positioner can be reversed in the same manner as described in the changing positioner action procedures However before attempting to reverse the action see table 4 or consult your Emerson Process Management sales office to determine if a different retainer different range springs or different bias springs are required Parts Ordering A serial number is assigned to each positioner The serial
45. okes fully with the other half of the input signal range Valve positioners shipped from the factory for split range operation are constructed and adjusted accordingly If it is necessary to convert an existing positioner to one suitable for split range operation refer to table 4 If the application requires a selection not listed in table 4 consult your Emerson Process Management sales office to determine the new parts required For most changes a new range spring and possibly a new bias spring will be required A new range spring retainer might also be required for 3570 3570C 3572 and 3573 positioners When corresponding with your Emerson sales office supply all information possible about the desired operating conditions and the serial numbers of the control valve assembly This information will facilitate the proper selection of the required parts To change an existing valve positioner to one suitable for split range operation refer to the range and bias spring removal and replacement procedures in the Maintenance section Be certain the required new parts are on hand before beginning any maintenance operation Initial Range Spring Extension Procedures for 3570P And 3570PC Positioners This procedure must be performed whenever the range spring has been changed or the positioner has been removed Key numbers used in this procedure are shown in figure 14 except where indicated 1 With the cap screw key 87 removed hook the small ball o
46. on To change the springs refer to the range and bias spring procedures in the Maintenance section From table 4 select the signal range that matches your application Find the travel length for the application under the signal range selected then use the code from the direct or reverse column that matches the direct or reverse operation of the positioner The first number in the code is used to identify the range spring the letter in the code is used to identify the bias spring and the second number after the letter is used to identify the spring retainer For example from table 4 for a 3570 Positioners Instruction Manual September 2011 D200137X012 signal range of 0 to 1 0 bar 0 to 15 psig an actuator travel of 14 3 mm 9 16 inch and direct action the signal range code from table 4 is 6G3 The 6 indicates the range spring The G indicates the bias spring The 3 indicates the spring retainer Note It is necessary to add the bias spring seat key 8 to a unit when changing from an extension type spring key 9 to a compression type spring key 48 When planning to change the bias spring in an existing unit inspect the unit first to determine if the current bias spring is an extension type spring key 9 or a compression type spring key 48 To change from an extension type spring to a compression type spring it is necessary to add the bias spring seat key 8 Refer to the appropriate procedures in the M
47. ot exceed any of the following e The maximum supply pressure for the positioner as shown in table 1 The maximum pressure rating of the actuator from the appropriate actuator instruction manual e The maximum allowable valve plug stem load for the specific valve body assembly being used Contact your Emerson Process Management sales office for valve plug stem load information if required e For diaphragm actuators refer to the actuator instruction manual for the recommended supply pressure and use the larger value of the range listed The recommended supply pressure for use with piston actuators is the highest available supply pressure between 3 4 bar 50 psig and the maximum limit determined by the actuator and positioner specifications Selecting the highest pressure within the limits will minimize load error and will maximize stroking speed and thrust For the lowest supply pressure that will assure satisfactory performance the factors of valve plug unbalance force valve plug seating force and frictional force must be considered in the following relationship Valve Seating Frictional Supply unbalance force force 3507 bar pressure 98 kg kg kg bar Area of the actuator piston in square mm or Valve Seating Frictional Suppl unbalance force force recur pounds pounds pounds sO pale psig Area of the actuator piston in square inches Consult your Emerson Process Management sales office for
48. pecialized instrument terms are defined in ANSI ISA Standard 51 1 Process Instrument Terminology 1 Fora 3570 or 3570C positioner mounted on a 470 or 480 actuator Values do not apply to other constructions or actuator valve combinations 2 Natural gas should not contain more than 20 ppm of H2S 3 m3 h at 0 C 1 01325 bar absolute Scfh at 60 F 14 7 psia 3570 Positioners Instruction Manual September 2011 D200137X012 Table 2 Action Under Normal Operating Conditions DESIRED PISTON MOTION POSITIONER ACTION Down Up Direct acting Increasing input signal pressure to bellows Decreasing input signal pressure to bellows Reverse acting Decreasing input signal pressure to bellows Increasing input signal pressure to bellows 1 Supply pressure is routed through relays to piston Table 3 Pressure Indications NUMBER OF GAUGES SUPPLIED PRESSURE MONITORED Two Relay One Relay STANDARD GAUGE RANGE Positioner Positioner 0 30 psi 0 0 2 MPa 0 2 bar or Positioner input signal pressure 1 1 0 60 psi 0 0 4 MPa 0 4 bar Cylinder relay output pressure 2 1 0 160 psi 0 1 1 MPa 0 11 bar 1 For gauges marked in other units and ranges consult your Emerson Process Management sales office 3573 Pneumatic valve positioner that is similar to The 3572 positioner with the relay output pressure piped to the bottom piston underside of the actuator cylinder The 3573 positioner is normally used
49. providing air pressure electric power or a control signal to the actuator Be sure the actuator cannot suddenly open or close the valve Vent the power actuator loading pressure and relieve any actuator spring precompression Use lock out procedures to be sure that the above measures stay in effect while you work on the equipment Personal injury or property damage may result from fire or explosion if natural gas is used as the supply medium and preventive measures are not taken Preventive measures may include but are not limited to one or more of the following Remote venting of the unit re evaluating the hazardous area classification ensuring adequate ventilation and the removal of any ignition sources For information on remote venting of this positioner refer to page 8 Check with your process or safety engineer for any additional measures that must be taken to protect against process media Troubleshooting If the positioner causes sluggish or erratic operation or the malfunctioning of the actuator first be certain that the range springs bias springs and spring retainer are correct for the application Refer to table 4 or consult your Emerson Process Management sales office If the springs and spring retainer are correct and careful adjustment of the unit does not produce smooth and satisfactory operation check the following points Key numbers used in this procedure are shown in figure 11 except where indicated Figure 4 shows
50. r 40 psig output pressure change a 1 4 bar 20 psig nozzle pressure change produces an 5 5 bar 80 psig output pressure change With a constant input signal pressure the internal parts of the relay are at equilibrium with the supply and exhaust valves closed 24 Instruction Manual 3570 Positioners D200137X012 September 2011 Figure 10 Sectional View of a Typical Relay NOZZLE AND LOCKNUT USED WITH 3570C AND 3570PC POSITIONERS 40A8972 B DOC cav oUr A i PLUNGER SUPPLY A SUPPLY PRESSURE AREA NOTES B RELAY OUTPUT PRESSURE VALVE gt OUTPUT PORT IS SHOWN C EXHAUST VALVE 90 DEGREES TO THE FRONT OF D RELAY OUTPUT PRESSURE AREA ACTUALLOCATION E DIAPHRAGM HEAD ASSEMBLY W0700 1 IL F NOZZLE G RELAY RESTRICTION PLUG AS SEMBLY R FIXED RESTRICTION Maintenance Parts are subject to normal wear and must be inspected periodically and replaced as necessary The frequency of parts inspection and replacement depends upon the severity of service conditions When inspection or repairs are required disassemble only those parts necessary to accomplish the task A WARNING Avoid personal injury from sudden release of process pressure Before performing any maintenance operations e Always wear protective clothing gloves and eyewear 25 3570 Positioners Instruction Manual September 2011 D200137X012 Do not remove the actuator from the valve while the valve is still pressurized Disconnect any operating lines
51. s signal has increased The bellows expands and moves the beam which pivots around a fixed point and covers the relay nozzle The nozzle pressure in the relay increases due to the restriction created by the beam covering the nozzle Through relay action the pressure above the piston overcomes the force exerted by the actuator spring and the piston moves downward This changes the valve plug position In the 3572 positioner piston movement is fed back to the beam by means of a range spring which is connected to the beam and the piston rod extension As the piston rod extension moves downward the range spring is extended until the torque of the beam balances the torque exerted by the instrument bellows 22 Instruction Manual 3570 Positioners D200137X012 September 2011 In the 3576 positioner the feedback is provided to the range spring by a wire that is connected to the actuator valve stem connector As the input signal decreases the reverse action takes place The bellows contracts and as the beam pivots it uncovers the relay nozzle Through relay action the pressure on top of the piston decreases and the force of the actuator spring moves the piston upward 3573 and 3577 Valve Positioners Refer to the schematic diagram in figure 9 which shows the 3573 positioner mounted on a 473 pneumatic piston actuator For the 3577 positioner the principle of operation is identical to the 3573 positioner but the actuator can be direc
52. so acts on the area D This provides an air feedback that returns the diaphragm head assembly E and the movable nozzle F to their original positions thus preventing any further increase in output pressure The feedback arrangement and the movable nozzle ensure accurate and stable positioning of the actuator piston without introducing cycling or over correction After any change in the output pressure supply valve B and exhaust valve C always return to the closed position to put the nozzle back in its original or equilibrium position The spring behind supply valve B aids in closing the valve as the diaphragm head assembly is forced upward When the beam flapper moves away from the nozzle F the supply pressure bleeds out at a greater rate than it enters through the fixed restriction R The pressure then decreases in the chamber between diaphragms The force of the cylinder pressure acting on area D pushes diaphragm head assembly E upward opening exhaust valve C Cylinder pressure bleeds through the exhaust port to atmosphere As the cylinder pressure decreases and the force on area D decreases the force of the nozzle pressure in the chamber between the diaphragms returns the assembly to its original position The unit is again in equilibrium but at a lower nozzle pressure and a lower output pressure Each relay has a 4 1 ratio between the nozzle pressure and the output pressure For example a 0 7 bar 10 psig nozzle pressure change produces a 2 7 ba
53. t Number 1 1H8914000A2 2 1H8915000A2 3 1H8916000A2 4 1H8917000A2 5 1H8918000A2 6 1H8919000A2 7 1H8920000A2 8 1H8921000A2 9 1H8922000A2 10 1H8955000A2 11 1H895627012 12 1H8957000A2 13 1J5185000A2 14 1J5715000A2 15 1K5363000A2 16 1K6684000A2 17 1R613527012 18 1R2822000A2 19 1R853527012 20 1R899827012 21 1U582727012 22 17A3811X022 1 The range spring code number is the first number given in each signal range code listed in table 4 For example for a signal range of 0 to 1 0 bar 0 to 15 psig an actuator travel of 14 3 mm 9 16 inch and direct action the signal range code from table 4 is 6G3 The appropriate range spring is indicated by 6 2 Range springs do not have a color code All range springs are silver 3 The first six numbers of a range spring part number is also the tag number For example a range spring with part number 1H8914 000A2 has a tag number of 1H8914 Tags are attached to the parts at the time the parts are manufactured Table 6 Bias Spring 1 2 Code Letter Color Code Part Number A Silver 1H8618270120 B Light blue 1H8932270120 C Red 1H8933270120 D Light green 1H8968270120 E Dark green 1J2932X00A2 4 F Pink 1 2933000A2 4 G Black 1N7177000A2 4 H Brown 1R613427012 3 1 The bias spring code letter is the letter given in each signal range code listed in table 4 For example for a signal range of 0 to 1 0 bar 0 to 15 psig an actuator travel of 14 3 mm 9 16 inch and dire
54. t or reverse acting Figure 9 Schematic Diagram of Fisher 3573 Positioner with 473 Pneumatic Piston Actuator BELLOWS crim REVERSED RANGE SPRING RELAY c POSITION BIAS SPRING INPUT CYLINDER SIGNAL R RESTRICTION PISTON YOKE ZX INPUT SIGNAL PRESSURE SUPPLY PRESSURE m ZZZA BOTTOM CYLINDER PRESSURE SA NOZZLE PRESSURE The pneumatic output signal from a control device is piped to the positioner bellows For explanation purposes assume this signal has increased The bellows expands and moves the beam which pivots around a fixed point and uncovers the relay nozzle The nozzle pressure decreases due to the uncovering of the nozzle by the beam Through 23 3570 Positioners Instruction Manual September 2011 D200137X012 relay action the pressure to the underside of the piston decreases The force exerted by the actuator spring overcomes the force of the pressure below the piston and the piston moves downward This changes the valve plug position In the 3573 positioner piston movement is fed back to the beam by means of a range spring which is connected to the piston rod extension The downward movement of the piston rod extension extends the range spring until the torque of the beam balances the torque exerted by the instrument bellows In the 3577 positioner feedback is provided to the range spring by a wire that is connected to the actuator valve stem connector As the input
55. tem position feedback is provided through extension of the range spring attached to the actuator piston rod 3570C Pneumatic valve positioner with automotive tire valves instead of pressure gauges Tire valves can be used for clip on test pressure gauges The relay nozzles are locked in place with locknuts to resist unwanted nozzle movement due to vibration 3570P Pneumatic valve positioner with two relays for use with Fisher 490 pneumatic piston actuators The positioner includes three pressure gauges to monitor input signal relay output pressure to the top of the actuator cylinder and relay output pressure to the bottom piston underside of the actuator cylinder The 3570P positioner is mounted alongside the actuator cylinder Actuator stem position feedback is provided from the actuator valve stem connector through a cable and spool assembly 3570PC Pneumatic valve positioner with automotive tire valves instead of pressure gauges Tire valves can be used for clip on test pressure gauges The relay nozzles are locked in place with locknuts to resist unwanted nozzle movement due to vibration 3571 Discontinued Pneumatic valve positioner with two relays for use with long stroke cylinder actuators The positioner includes three pressure gauges to monitor input signal relay output pressure to the top of the actuator cylinder and relay output pressure to the bottom piston underside of the actuator cylinder The 3571 positioner
56. the appropriate values for specific actuators valves and service conditions The 0 7 bar 10 psig is added to the equation to account for an approximate 0 7 bar 10 psi differential pressure loss in the positioner For spring return piston actuators the pressure required to compress the actuator spring completely must also be considered Cylinder Connections 1 The connection marked CYLINDER see figure 4 is connected at the factory to the lower part of the cylinder bottom or to the lower diaphragm casing if the positioner is used with a pneumatic diaphragm actuator 2 The cylinder top connection is a pressure passage located in the bottom of the positioner base key 1 figure 11 On 3570 and 3570C positioners an O ring key 33 figure 11 is used between the bottom of the positioner and the top of the actuator On 3570P 3570PC 3571 3576 and 3577 positioners a mounting bracket key 55 figure 13 is required This mounting bracket connects to the bottom of the base An O ring key 33 figure 11 is placed between the base and mounting bracket This mounting bracket provides a 1 4 NPT connection for the positioner output This connection is made at the factory if the positioner is ordered mounted to the actuator or if the mounting bracket is installed Instrument Connection The connection marked INSTRUMENT see figure 4 connects to the output signal connection of the control device The positioner operates only on a pneumatic input si
57. tubing assemblies keys 28 and 45 from the base and from the gauges keys 24 and 25 Unscrew the hex nuts key 27 from the back of the gauges and remove the gauges keys 24 and 25 4 Unscrew the pressure gauge key 54 from the gauge adaptor key 29U 5 Unscrew and remove the nozzle and spring keys 29Q and 29P from each relay 6 The gauge bracket key 5 can be removed if desired To remove it loosen the locknut key 7 and remove the bias T spring post and cap screw keys 6 and 32 When replacing the bias spring post be sure that the bottom of the post thread is positioned as shown in figure 2 for proper positioning of the E ring travel stops This alignment can be verified visually through the vent port Use compression plugs key 52 to plug the holes opened in the base when the tubing is removed CAUTION Never rotate the nozzle key 29Q when the locknut key 29P is tight or damage to the relay diaphragm will result Always use a wrench on the nozzle to prevent it from turning while loosening or tightening the locknut 8 9 10 11 12 Install the locknut and nozzle keys 29P and 29Q on each relay Install the tire valve key 26 figure 12 into the gauge adaptor key 29U Install the service tee and tire valve adaptor keys 49 and 53 figure 12 into the CYLINDER connection Connect the pressure line that runs to the lower part of the cylinder to the service tee Install the pipe nipple pipe tee and
58. uator is installed in the vertical position However the vent must be protected against the entrance of any foreign material that could plug it Check the vent periodically to be certain it is not plugged If the actuator is mounted in other than the vertical position be sure there is a vent and drain at the lowest point of the positioner To do this remove the pipe plug key 36 figure 11 from the cover Then position the cover in such a way that the hole in the cover is at the lowest point Plug the vent connection because the positioner is now vented through the cover Note A remote vent is not possible with 3570P 3570PC 3571 3576 and 3577 positioners If a remote vent is required the vent line must be as short as possible with a minimum number of bends or elbows Vent line piping should have a minimum inside diameter of 19 mm 3 4 inch for runs up to 6 09 meters 20 feet and a minimum inside diameter of 25 4 mm 1 inch for runs from 6 09 to 30 5 meters 20 to 100 feet Supply Pressure Connections A WARNING Personal injury or property damage may occur from an uncontrolled process if the supply medium is not clean dry oil free air or noncorrosive gas While use and regular maintenance of a filter that removes particles larger than 40 micrometers in diameter will suffice in most applications check with an Emerson field office and industry instrument air quality standards for use with corrosive air or if you are unsure about the
59. uges The two relay output pressures should be approximately equal within 0 3 bar 5 psig and should be approximately 75 percent of the supply pressure For example if the supply pressure is 7 bar 100 psig the two relay output pressures should be within 0 3 bar 5 psig of each other and should be approximately 5 2 bar 75 psig CAUTION The relays in the 3570C and 3570PC positioners use a locknut key 29P figure 11 on the nozzle key 29Q If the nozzle is rotated when the locknut is tight damage to the relay diaphragm might result Always use a wrench on the nozzle to prevent it from turning while loosening or tightening the locknut If the relay output pressures are not at the values mentioned adjust the nozzles Counterclockwise rotation of either nozzle will move the nozzle closer to the beam and will increase relay output pressure For all 3570 positioners examine the end of the beam near the bias spring see figure 2 The beam should be approximately centered between the two E ring travel stops Observing the caution above for 3570C and 3570PC positioners rotate the nozzle s to center the beam between the E rings For positioners with two relays the relay output pressures must be approximately equal within 0 3 bar 5 psig and approximately 75 percent of supply pressure after the beam is centered 7 Apply an input signal equal to the low value of the input signal range 0 2 bar 3 psig in this example Adjust the bias spr
60. xcept 3570C 0 30 psi 0 2 MPa 0 2 bar 21B4037X012 0 60 psi 0 4 MPa 0 4 bar 21B4037X022 25 Cylinder bottom gauge plastic case brass wetted parts For 3570 3571 3573 3577 0 160 psi 0 1 1 MPa 0 11 bar 21B4037X032 Recommended spare parts Instruction Manual D200137X012 3570 Positioners September 2011 Figure 11 Fisher 3570 Positioner di 25 PART 22 DIRECT ACTION 20 9 v L EXTENSION TYPE m BIAS SPRING Or O ASSEMBLY SECTION OF PART 29 c E AL 2C I7 ip 39 is 3 f Alo 7 le 45 i 30 El I if 24 5 i 1 4 NPT tx armas CYLINDER P SZ 6 a BOTTOM 28 CONNECTION F 1 4 NPT 1 4 NPT 3 8 NPT VENT INPUT SIGNAL SUPPLY CONNECTION CONNECTION CONNECTION NOTES T gt ZERO ADJUSTMENTS IS PART OF KEY 9 FOR EXTENSION TYPE BIAS SPRING 2 gt zero ADJUSTMENTS IS PART OF KEY 9 FOR EXTENSION TYPE BIAS SPRING 40A8973 C B1840 IL Key Description Part Number Key Description Part Number 30 Relay gasket 2 req d 26 Valve Assembly Chloroprene std const For 3570C only Fluorocarbon hi temp const 27 Hex nut brass 31 Machine screw pl steel For 3570 3571 3573 2 req d For 3570 3570C 3571 6 req d For 3572 3576 3577 1 req d For 3572 3573 3576 3577 3 req d For 3570C none req d 28 Instrument tubing assembly copper 32 Cap screw pl ste

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