MODEL 73N BUILT-IN VALVE POSITIONER
Contents
1. AD CONNECTION fii E EN Y M y BOTTOM easket 2 OOOO ax Fe lar mi HLY m IS A l Oo CLL aL M A ww NR EL i RN 9 SW 2 1 4 1 8 FOR STD RANGE SPRING ui mm E S 12395 ITEM at ncs S 2 1 4 1 64 FOR PREC RANGE SPRING CUSTOMER PROV AP 12388 ITEM CENTERING WASHER l S mE X as tomy gt ore T 1 8 TYP 0 VALVE DIAPHRAGM IN a Da b TR PPERMOST OPERATING FONT ON ZERO 1 ALL CONNECTIONS ARE 1 4 NPT VALVE PRESSURE 2 1 4 1 16 DIA 2 REPLACE BOTTOM GASKET WITH P N 10636 59 CENTERING DIAPHRAGM IF REQUIRED SEE INSTALLATION SECTION Figure 1 Installation Dimensions and Connections SD73 Dew Point Dew point at line pressure should be at least 10 C 18 F below the minimum temperature to which any part of the instrument air system is exposed at any season of the year Under no circumstances should the dew point at line pressure exceed 2 C 35 6 F Oil Content Maximum total oil or hydrocarbon content exclusive of non condensables should not exceed 1 ppm under normal operating conditions CAUTION Exceeding the specified ambient temperature limits can adversely affect performance and may cause damage ADJUSTMENT The only adjustment that can be made on the positioner is a zero adjustment The zero adjusting screw is located under the positioner top cover To adjust the zero set the instrument pressure to the midpoint of its span and turn the zero adjustment until2. This positioner is denoted by the letters USM in the model number There is no bleed on this model due to the low volume A special valve plunger is used to ensure fast response for close control GENERAL SPECIFICATIONS Instrument Input Pressure Range 3 15 3 9 9 15 and 3 27 psig Supply Pressure IY Vir TINT PT m S 3 psi above required actuator pressure Maximum eseista 100 psi Air Consumption sess 0 25 SCFM in balance condition with 20 psi supply and 9 psi dead ended output Valve Travel Minimum erasini Yen 1 4 Maximum cccececccceccceeeeceeeeeeeeeeeeeeeeees 4 Ambient Temperature Limits 40 C to 82 C 40 F to 180 F 417 831 1411 csidesigns com SD73 INSTALLATION Refer to Figure for mounting dimensions and connections A centering washer customer provided which fits the I D of the range spring should be used This acts as a spring seat and keeps the spring from shifting Mounting hardware is included with the positioner in a plastic bag numbered 10448 88 It contains 6 mounting screws and washers 1 range spring seat and 1 gasket CAUTION Exceeding the specified ambient temperature limits can adversely affect performance and may cause the positioner to fail 1 Place centering washer on the actuator s diaphragm or piston 2 Place the positioner range spring on the center of the actuator diaphragm or piston oY Place the gasket on
3. 512 824 624 524 3 8 1812 1412 1212 1012 712 612 1024 124 624 7 16 2012 1812 1412 1012 812 712 1024 824 124 1 2 2412 2012 1612 1212 1012 812 1224 1024 824 9 16 2812 2012 1812 1412 1012 1012 1424 1024 5 8 3212 2412 2012 1612 1212 1012 1624 1224 1024 3 4 3612 2812 2412 1812 1412 1212 1464 1224 7 8 4412 3612 2812 2012 1812 1412 2024 1624 1424 1 4812 4012 3212 2412 2012 1612 2424 2024 1624 1 1 8 5612 4412 3612 2812 2012 1812 2024 1 1 4 6412 4812 4012 3212 2412 2012 2824 2424 2024 1 1 2 6412 4812 3612 2812 2412 4024 2824 2424 1 5 8 6412 4812 4012 3212 2612 4024 3224 1 3 4 6412 0612 4412 3612 2812 4024 3224 2824 2 6412 4812 4012 3212 4824 4024 3224 2 1 4 6412 5612 4412 3612 4024 2 1 2 6412 4812 4012 4824 4024 2 3 4 6412 4812 4412 4824 4824 3 6412 4812 4824 3 1 2 5612 4 6412 Special Notes 1 All range springs are identified as Part No P N 12395 from table 2 Input pressure span pressure max input minus pressure min input e g 3 15 psig range 12 psig span Spring Selection 1 Find valve stroke nearest desired valve stroke 2 Find instrument input pressure span nearest desired instrument input pressure span 3 Select proper range spring at intersection of valve stroke and instrument input pressure span columns Springs purchased with models are quoted as model discounts all others get spare parts pricing Notes 1 The maximum zero pressure for the Model 73N12F is 9 psig when the 12395 series range spri
4. EXHAUST a US SENS m NY MCN RANGE SPRING E PANG 34 SSS e Uf an ON L AS S ACTUATOR DIAPHRAGM OR PISTON Figure 5 Schematic Reverse Acting SD73 PRODUCT SUPPORT This section provides the Internet site addresses e mail addresses telephone numbers and related information for customers to access Siemens product support When contacting Siemens for support e Please have complete product information at hand e For hardware this information is provided on the product nameplate part number or model number serial number and or version e For most software this information is given in the Help gt About screen e If there is a problem with product operation e Is the problem intermittent or repeatable What symptoms have been observed e What steps configuration changes loop modifications etc were performed before the problem occurred e What status messages error messages or LED indications are displayed e What troubleshooting steps have been performed e Isthe installation environment e g temperature humidity within the product s specified operating parameters For software does the PC meet or exceed the minimum requirements e g processor memory operating system e Acopy of the product Service Instruction User s Manual or other technical literature should be at hand The Siemens public Internet site see the table has current revisions of technical literature in Portable Document For
5. Items 22 23 25 thru 32 34 1 thru 40 42 46 amp 47 16 10637 19 Control Diaphragm Assy Incl Items 22 23 24 26 29 31 thru 38 40 41 43 44 amp 45 1 17 3821 3 Gasket 1044 18 3821 5 Screw 2 2 2 19 10636 22 Bottom Ring 10171 20 10448 15 Spring Seat i Se 21 Range Spring Advise Range i and Valve Stroke E ee 22 3821 32 Nut E033 23 10637 23 Bottom Disc TES 24 10637 22 Bottom Spacer l 25 10636 74 Bottom Spacer 1 1 26 2938 1 0 Ring T2 3 27 10636 63 Diaphragm Disc 11 28 8648 6 Diaphragm 11 29 8648 7 Diaphragm Re ae 30 10636 66 Diaphragm Disc 1 1 31 10637 8 Diaphragm Ring 1 1 32 10448 10 Spacer t3 33 10637 10 Center Ring t 34 10448 11 Diaphragm Disc ee 35 8648 2 Diaphragm 4 36 10637 18 Diaphragm Disc b 1 37 14418 1 Belleville Spring Washer 9 9 8 38 10637 9 Upper Ring l E o 39 10636 21 Center Ring m 3 A 40 14819 2 Diaphragm Disc 1 24 2 23 41 10380 6 Washer Gar ae amp 5 22 22 42 10636 18 Upper Ring 11 73IN__FR a 73 43 8648 8 Diaphragm 1 a 44 10448 9 Upper Spring Seat l 45 10637 21 Diaphragm Rod 1 46 10448 38 Upper Spring Seat 11 47 10636 73 Diaphragm Rod 1 1 A 1 1840 B 32 x 1 4 Lg Truss Hd 11 3 B 1 3830 1 4 20 x 2 13 16 Fill Hd 6 6 6 C 1 7303 1 4 Med L washer 6 6 6 Recommended on hand spare paris Always specily range serial no or other nameplate information when ordering Spare Parts IMPORTANT Ser
6. Seat 1 43 10636 73 Diaphragm Rod 1 A 1 1840 8 32 x 1 4 Lg Truss Hd 1 B 1 3830 1 4 20 x 2 13 16 Fill Hd 6 C 1 7303 1 4 Med L washer 6 Recommended on hand spare parts Always specify range serial no or other nameplate information when ordering Spare Parts 417 831 1411 csidesigns com IMPORTANT Service Parts Kits are available for servicing the instrument Contact Siemens for available kits refer to the Product Support section of this instruction Some parts in this Parts List may not be available for separate purchase 1
7. the mounting flange of the actuator top works Substitute the P N 10636 59 centering diaphragm for the gasket if the P N 12388 6412 or 12395 6412 range spring is used 4 Place the positioner range spring seat on the center nut of the positioner diaphragm assembly 5 Hold the spring seat and guide the positioner and seat onto the range spring 6 Orient the positioner for desired location of connections 7 Insert mounting screws and washers and tighten screws PNEUMATIC CONNECTIONS 1 All connections are 1 4 NPT 2 The piping recommended for the positioner is 1 4 O D tubing for the INSTRUMENT input connection and 3 8 O D tubing for the supply connection However any scale free piping may be used 3 Blow out all piping before connections are made to prevent dirt chips etc from entering the positioner 4 Use pipe sealant sparingly and then only on the male threads A non hardening sealant is strongly recommended 5 Connect the positioner to a source of clean dry oil free instrument air supply see INSTRUMENT AIR REQUIREMENTS CAUTION Pressure in excess of 150 psig to any connection may cause damage INSTRUMENT AIR REQUIREMENTS Connect the positioner to a source of clean dry oil free supply air Failure to do so will increase the possibility of a malfunction or deviation from specified performance CAUTION A Use of process fluids other than instrument air is not recommended No claim is made as to the suitabili
8. Siemens INSTALLATION AND SERVICE INSTRUCTION Energy amp Automation SD73 Rev 12 December 2005 Supersedes Rev 11 MODEL 73N BUILT IN VALVE POSITIONER The Model 73N is a Built in Valve Positioner which is mounted directly on the topworks of a valve It is capable of utilizing the full force of its air supply to drive the piston or diaphragm in a pneumatic actuator to a position called for by the control instrument The positioner incorporates a single axis force balance principle of operation to insure accurate and stable positioning of a control valve MODEL DESIGNATION 73N 12 F Basic Model Number Input Span psig Special Feaures F Fast response R Reverse acting E Tapped Exhaust USM U S Electrical Motors Type Fast Response The fast response positioner is used on actuators with large volume topworks requiring a fast response action Due to increased pilot plunger travel and larger ports in the fast response positioner greater filling and exhausting capacities result This permits a quicker response to a change in control conditions plus increased speed of valve operation Tapped Exhaust The Model 73N Positioner can be ordered with a tapped exhaust port This feature permits piping of the pilot exhaust to a safe atmosphere on applications where noxious gases are used as a control medium instead of air USM On actuators with small topworks and a low volume a special hi response positioner may be used
9. ck None Black Black White Black Purple Black Purple Black Green Black Black Yellow Black Purple White Purple Yellow Black Yellow Yellow White Yellow Red Black Red Red White Red Green Black Green White Green White Red Green Red Green White Green Orange Black Orange Yellow Brown Yellow Orange White Orange Purple None Purple Yellow None Yellow Yellow Purple Yellow Orange Brown Orange Green Brown Green Green Red Green Red Yellow Red Red Purple Red White Black White Green Yellow Green Green Purple Green Red None Red Orange Yellow Orange Orange Purple Orange Brown Orange Brown Brown None Brown Figure 3 Range and Zero Spring Color Codes SD73 ZERO ADJUSTMENT AY in SUPPLY PORT m 2 ZERO SPRING NI VALVE PRESSURE aaa BLEED PET EXCEPT ON MODEL 73N12FUSM SS X MN he SS x 3 rz INSTRUMENT INPUT t 4 P EXHAUST NEZI k EXHAUST PORT pons ate j E AS NA DIAPHRAGM ASSEMBLY NM A NC LE eec A uo ber V ACTUATOR DIAPHRAGM OR PISTON Figure 4 Schematic Direct Acting MEL ee ADJUSTMENT SCREW 31 N IN NE df Th SUPPLY PORT SUPPLY S zu MW oj NV fadi _ __ PLUNGER ZERO SPRING sA N x ___ GAUGE CONNECTION w VALVE PRESSURE BLEED ay m LL INSTRUMENT INPUT UNS RE eru AY Cress S EXHAUST PORT DIAPHRAGM ASSEMBLY 4 f Y RSS N ANN SS Ix 77777777
10. emedies specified in this article and shall have no others for a nonconformity in the goods Buyer agrees that these remedies provide Buyer and its successors with a minimum adequate remedy and are their exclusive remedies whether Buyer s or its successors remedies are based on contract warranty tort including negligence strict liability indemnity or any other legal theory and whether arising out of warranties representations instructions installations or non conformities from any cause e Note The above does not apply to any software which may be furnished by Seller In such cases the attached Software License Addendum applies SD73 PARTS LIST SIEMENS MODEL SERIES 73N BUILT IN VALVE POSITIONER Drawing No 10636PL 3 91 Supersedes 8 88 MODELS B M T3N12F 14823 F1 T3N24F 14823 F2 Rea d T3N FR 10637 ewu u we ERES sss Item Part No Description BN 1 3821 76 Top Cover Incl Item A IP 3 3 3821 43 Zero Screw 1 35 4 2938 5 0 Ring 044 5 3821 16 Retaining Nut a na 6 10380 2 Spring 14 3 y j 10636 25 Valve Plunger DU 3 8 10613 12 Washer 1 10598 1 Retaining Ring a 1 10 10479 12 Screen 34 3 11 3092 35 Pipe Plug P 3 3 12 Top Housing Incl 2155 251 Filter Screen Not Shown 13 7058 11 Spring Seat 1 14a 10613 13 Spring 1 14b 10448 16 Spring For Model 73N12F 1 1c 10448 23 Spring For Mode 73N24F 1 15a 10636 71 Control Diaphragm Assy inc 1 15b 10636 75
11. mat for downloading e To send an instrument to Siemens for repair request a Return Material Authorization RMA IMPORTANT An instrument must be thoroughly cleaned decontaminated to remove any process materials hazardous materials or blood born pathogens prior to return for repair Read and complete the Siemens RMA form s Contact Information Telephone 1 800 569 2132 option 2 for Siemens and Moore brand instruments 1 215 646 3547 United States PITechSupp OG sea siemens com e Hours of Operation 8 a m to 4 45 p m eastern time of America enc Monday Friday except holidays Public Internet Site www seasiemens com ia 1 215 646 7400 extension 3187 For contact information outside the U S A visit the Siemens public Internet site see the above table for the URL locate Customer Support Process Instrumentation and click on the Contact Tech Support link to access the Global Support link Current revisions of instructions and manuals in Portable Document Format PDF can be found at the Siemens public Internet site SD73 WARRANTY a Seller warrants that on the date of shipment the goods are of the kind and quality described herein and are free of non conformities in workmanship and material This warranty does not apply to goods delivered by Seller but manufactured by others b Buyer s exclusive remedy for a nonconformity in any item of the goods shall be the repair or the replacement at Seller s op
12. ner body located on the underside of the stack 4 The diaphragm stack assembly can be further disassembled by removing the diaphragm jam nut ASSEMBLY Refer to parts list To assemble reverse the disassembly procedures Take care to insure proper alignment of the diaphragms and rings When tightening the jam nut on the diaphragm assembly make sure the diaphragms do not rotate out of position An alignment slot is provided on the rings to facilitate proper assembly RANGE SPRING NO 12388 ITEM 12395 ITEM L H WOUND 4090 Item R H Wound 80 100 126 Zero Spring 10448 16 10448 23 106 13 13 COLOR CODE Blue White Blue White Blue White Blue Brown Blue Brown Blue Brown Blue Black Blue Black Blue Black Blue Green Blue Green Blue Green Blue Purple Blue Purple Blue Purple Blue Yellow Blue Yellow Blue Yellow Blue Red Blue Red Blue Red Blue Orange Blue Orange Blue Orange Blue Gray Blue Gray Blue Gray Gray White Gray Gray Brown Gray Brown Gray Brown Gray Black Gray Black Gray Black Gray Green Gray Gray Purple Gray Purple Gray Purple Gray Yellow Gray Yellow Gray Yellow Gray Red Gray Gray Orange Gray Orange Gray Orange Blue Red White Blue Black White Black Gray White Blue Black Green Blue Black Red Red Green Red Orange Green Green Orange Green White 12395 Brown White Brown Brown Black Brown White Mone White Bla
13. ng is used 2 The maximum zero pressure for the Model 73N24F is 15 psig for instrument pressure spans of 16 psi or greater and 28 psig when used for spans of 12 psi or less 3 The maximum instrument pressure for the Model 73N FR is 15 psig for instrument pressure spans of 12 psi or less and 27 psi for spans of 16 psi or greater Figure 2 Range Spring Index SD73 MAINTENANCE GENERAL Clean dry oil free instrument air will reduce most problems associated with pneumatic instruments Refer to INSTRUMENT AIR REQUIREMENTS If these requirements are observed no routine maintenance is recommended Cleaning the plunger is to only maintenance which may be required on an occasional basis The system should be shut down or the valve isolated from the system before service or removal of the positioner is accomplished CLEANING Refer to parts list The plunger can be cleaned without dismantling the positioner Use the following procedure 1 Turn off the supply air 2 Remove the positioner top cover 3 Remove the retaining nut 4 Remove the plunger 5 Use anon abrasive solvent to clean the plunger 6 Replace the plunger 7 Replace and tighten the retaining nut 8 Replace the top cover DISASSEMBLY Refer to parts list 1 Loosen the six socket head mounting screws holding the positioner to the actuator 2 Remove the positioner 3 Remove the two body screws holding the diaphragm stack assembly to the positio
14. the valve is at the mid point of its stroke In some cases valve shut off or opening may be required at a specific instrument pressure To zero the positioner at this point set the instrument pressure at the specific pressure and turn the zero adjustment screw until the valve reaches the required position A slight change of the instrument pressure should start to move the valve The valve stroke for a given span may also be suppressed or shifted to the desired range by means of the zero adjusting screw RANGE SPRING SELECTION Range springs for the positioner are selected from the table in Figure 2 Color coding of the range springs is given by the table in Figure 3 To find the proper spring select the stroke listed which most nearly agrees with the desired stroke and the pressure span which most nearly agrees with the desired span The proper spring will be found at the intersection of these two columns Series 4090 and 12395 range springs are available for stroke range tolerances of 10 Series 12388 range springs are available at extra cost for stroke range tolerances of 5 SD73 Input Pressure Span see Special Notes below 4 5 6 8 10 12 16 20 24 ois Item No of Range Spring Series 12395 Series 5 stroke range tolerance 1 4 1212 1012 812 612 512 412 624 524 424 5 16 1812 1212 1012 712 612
15. tion of the item and any affected part of the goods Seller s obligation to repair or replace shall be in effect for a period of one 1 year from initial operation of the goods but not more than eighteen 18 months from Seller s shipment of the goods provided Buyer has sent written notice within that period of time to Seller that the goods do not conform to the above warranty Repaired and replacement parts shall be warranted for the remainder of the original period of notification set forth above but in no event less than 12 months from repair or replacement At its expense Buyer shall remove and ship to Seller any such nonconforming items and shall reinstall the repaired or replaced parts Buyer shall grant Seller access to the goods at all reasonable times in order for Seller to determine any nonconformity in the goods Seller shall have the right of disposal of items replaced by it If Seller is unable or unwilling to repair or replace or if repair or replacement does not remedy the nonconformity Seller and Buyer shall negotiate an equitable adjustment in the contract price which may include a full refund of the contract price for the nonconforming goods c SELLER HEREBY DISCLAIMS ALL OTHER WARRANTIES EXPRESS OR IMPLIED EXCEPT THAT OF TITLE SPECIFICALLY IT DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE COURSE OF DEALING AND USAGE OF TRADE d Buyer and successors of Buyer are limited to the r
16. ty of this product for use with other process fluids such as hazardous gases except as listed on the appropriate certificate Non approved instruments are suitable for use with instrument air only Optional features and modifications such as tapped exhaust do not imply suitability for use with hazardous gases except as listed on the approval certificate CAUTION Synthetic compressor lubricants in the air stream at the instrument may cause the positioner to fail SD73 There are many types of synthetic lubricants Some may not be compatible with the materials used in the construction of the positioner Wetting of these materials by such an oil mist or oil vapor etc may cause them to deteriorate This may ultimately result in failure of the positioner The following materials are in contact with supply air Aluminum Brass Stainless Steel Neoprene and Buna N The requirements for a quality air supply can be found in the Instrument Society of America s Quality Standard for Instrument Air ISA S7 3 Basically this standard calls for the following Particle Size Maximum particle size in the air stream should be no larger than 3 microns 3 1 2 DIA 2 13 16 DIA B C THE TOPWORKS OF THE VALVE MUST HAVE SIX 1 4 20 x 9 16 DEEP MIN BLIND TAPPED HOLES EQUALLY SPACED FOR VIEW A A MOUNTING POSITIONER ZERO alr SCREW REMOVE PIPE PLUG FOR VALVE PRESSURE GAUGE INSTRUMENT IF REQUIRED INPUT SUPPLY am m f
17. vice Parts Kits are available for servicing the instrument Contact Siemens for available kits refer to the Product Support section of this instruction Some parts in this Parts List may not be available for separate purchase 10 SD73 PARTS LIST SIEMENS MODEL SERIES 73N12FUSM BUILT IN VALVE POSITIONER A Drawing No 10976PL 3 91 Supersedes 5 86 T 5H 3 y j B M 10976 B A s E v e 0 7 NP 11 item Part No Description Reqd 1 3821 76 Top Cover Incl Item A 1 3 3821 43 Zero Screw 1 4 2938 5 0 Ring 1 5 3821 16 Retaining Nut 1 6 10380 2 Spring 1 ape 10976 11 Valve Plunger 1 9 2155 225 Screen Insert 1 11 3092 35 Pipe Plug 1 12 10976 8 Top Housing incl Item 9 1 13 7058 11 Spring Seat 1 14 10448 16 Spring 1 15 10636 71 Control Diaphragm Incl Items 22 23 25 thru 32 34 thru 37 amp 39 thru 43 1 17 3821 3 Gasket 1 18 3821 5 Screw 2 19 10636 22 Bottom Ring 1 20 10448 15 Spring Seat 1 21 Range Spring Advise Stroke 1 22 3821 32 Nut 1 23 10637 23 Bottom Disc 1 25 10636 74 Bottom Spacer 1 26 2938 1 0 Ring 2 27 10636 63 Diaphragm Disc 1 28 8648 6 Diaphragm 1 29 8648 7 Diaphragm 2 30 10636 66 Diaphragm Disc 1 31 10637 8 Diaphragm Ring 1 32 10448 10 Spacer 1 34 10448 11 Diaphragm Disc 1 E 10637 18 Sashes D iaphragm Disc 1 SEQUENCE 37 14418 1 Belleville Spring Washer 9 2X 39 10636 21 Center Ring 1 40 14819 2 Diaphragm Disc 1 41 10636 18 Upper Ring 1 42 10448 38 Upper Spring
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