Model 40H Nullmatic Pressure Regulators
Contents
1. Filter Screen 1 4 20 x 2 1 8 Lg Soc Hd Cap Screw 40HA100 40HE100 amp 40HAE100 only Safety Release Valve 40H50 only Restriction Screw Incl Item 30 O Ring Cleaning Wire O Ring Spring Seat O Ring Spring Screen 1 4 20 x 2 Lg Fill Hd Screw 40H50 and 40HE50 only 1 4 20 x 2 1 4 Lg Fill Hd Screw 40HAS5O and 40HAESO only 1 4 20 x 2 Lg Soc Hd Screw 40H 100 only 4 40 x 3 8 Lg Pan Hd Self Tapping Screw 6 Flatwasher 1 4 Lockwasher Required A E HAE au sal aaa er rrr slicks ee Sal lt enicarcs ee ee ee Onn ONN Onn ONN Always Specify Range Serial No or Other Nameplate Information When Ordering Spare Parts SD40H SERVICE PARTS KITS Listed below are the kits available at the time of publication of this instruction Order the kit s needed to service the regulator model at hand In addition to the parts listed some kits include a parts list drawing or other instructions For Model s Kit Name Part Number Kit Contents Quantity Model 40H50 Diaphragm Misc Parts Kit 7298 100 Diaphragm 1 Top Diaphragm Assembly 1 O ring 1 Diaphragm Assembly 40H 1 Plunger Assembly 1 Model 40H100 Diaphragm Misc Parts Kit 7298 101 Diaphragm 1 Top Diaphragm Assembly 1 O ring 1 Diaphragm Assembly 40H 1 Plunger Assembly 1 Range Spring Kit2. Siemens Industry Inc INSTALLATION AND SERVICE INSTRUCTION SD40H Rev 10 June 2012 Supersedes Rev 9 Model 40H Nullmatic Pressure Regulators INTRODUCTION The Model 40 Nullmatic Pressure Regulator shown below uses the null balance principle which holds the output pressure constant regardless of wide changes in flow or supply pressure Each regulator is in essence a self contained pressure controller that can deliver up to a 40 scfm flow rate This instruction has five major sections Introduction Installation Principle of Operation Maintenance and Parts List Model Designation Model Series 40H A 50 40H Options A Air Loaded E Tapped Exhaust no letter Standard Range 50 1 to 50 psig 100 1 5 to 100 psig General Specifications Supply Pressure Model 40H50 Recommended eee eeeeeeeeeee 120 psig Maximum wee cece cee cseeereeee eee 150 psig Minimum eee eee eee eee cee eeeeeee 10 psi above desired output Model 40H100 Recommended e eee eeeeeeeeeee 150 psig Maximum eee cece cee creeereeee eee 500 psig Minim sisese 10 psi above desired output Maximum Air Loading 100 psig air loaded models only Ambient Temperature Limits 0 40 C to 82 C 40 F to 180 F Ambient Temperature Effect ee Approximately 1 of set pressure with standard spring Approximately 0 1 of set pressure with optional isothermal range spring Maximum Air Flow SCFM Delive
3. 2 7 15 30 and 50 psi 7298 112 Range Spring Qty 3 of each 15 Range Spring Kit 100 psi and greater 7298 113 Range Spring Qty 4 of each 8 Model 40H100 Minimum Overhaul Kit 7298 114 Restriction Screw 1 Diaphragm 1 Top Diaphragm Assembly 1 O ring 1 O ring 1 Diaphragm Spacer 1 Diaphragm Assembly Model 40H 1 Adjusting Knob Assembly 1 Models 40HA and HAE 3179 4 Models 40H and HE 1447 22 Top Casting 4557 11 1 Bushing 1 Models 40HA and HAE 3494 4 Models 40H and HE 2155 165 Bottom Forging 10803 36 1 Range Spring 1 White 2 psi 1938 1 Gray 7 psi 2155 67 Blue 15 psi 572 37 Red 30 psi 572 36 Brown 50 psi 2155 22 Green 100 300 and 450 psi 2155 23 Black 200 psi 2155 90 10
4. bottom forging Loose restriction screw Tighten securely External exhaust port blocked Remove obstruction Internal exhaust port clogged Remove valve plunger and clean exhaust seat port Output cannot be deceased to minimum value Supply pressure too high Reduce to recommended value Loose restriction screw Tighten securely Valve plunger being held open on exhaust seat by a chip pipe dope Teflon tape thread shaving pipe scale etc Remove valve plunger and clean its seats Damaged supply seat Install new bottom forging Disassembling the Regulator Before disassembling back off the adjusting knob to relieve spring tension Also make a diagonal mark across all mating parts to provide easier alignment of parts during reassembly To disassemble the regulator refer to the parts list drawings for part location and remove the body screws SD40H Assembling the Regulator The exhaust diaphragm assembly and exhaust ring must be positioned so that none of the holes on the bottom forging are blocked The three external holes on the exhaust ring line up under the gauge connection see Figure 1 for orientation with respect to the supply and output ports The center housing must be positioned to allow pilot and rebalance air to flow to the proper chambers pilot air to the bottom cavity of the center housing and rebalance air to the top cavity See Figure 1 for orientati
5. range spring force REBALANCE PASSAGE REGULATED OUTPUT VALVE PLUNGER A safety release valve is incorporated in the top diaphragm assembly of the 50 psig range model The safety release operates if the regulated pressure becomes 3 to 5 psig more than the set pressure It exhausts air through the atmospheric vent in the top housing An over pressure causes the diaphragm to move upward opening the safety release valve when the valve motion is stopped by the stripper plate MAINTENANCE Figure 2 Schematic Most problems associated with pneumatic instruments can be prevented by providing clean dry oil free instrument quality air as described in Installation Instrument Air Requirements No routine maintenance procedures are recommended if these requirements are observed Lubricating the Adjusting Screw An occasional application of light grease to the adjusting screw threads will facilitate easy turning of the adjusting knob especially in the high pressure models Cleaning the Restriction Screw 1 Turn off supply air 2 Remove restriction screw from bottom forging 3 Remove the knurled cleaning wire located near the output port and run it through the orifice at the tip of the restriction screw In stubborn cases the screw can be soaked in solvent to dissolve the blockage Examine the O ring for damage and cleanliness SD40H 4 Re install the screw and tighten it securely Cleaning the Valve Plunger 1 Turn off
6. 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 The maximum total oil or hydrocarbon content exclusive of non condensables should not exceed 1 ppm under normal operating conditions PRINCIPLE OF OPERATION A fine turn precision screw is used to manually load the range spring which sets the regulated pressure When the adjusting knob is turned clockwise for example the increased spring force is exerted on the top diaphragm assembly which decreases the nozzle clearance and increases the pilot pressure The source for pilot BALL THRUST BEARING RANGE SPRING pressure is supply air flowing to the pilot ATMOSPHERIC 4 e s T pressure chamber through the restriction NaN Y NOZZLE TOP EXHAUST screw The increased pilot pressure forces the exhaust diaphragm assembly downward closing the exhaust port contacting and moving the valve plunger and thereby opening the supply port This increases the regulated output which also feeds back to the top DIAPHRAGM ASS Y EXHAUST SLOTS EXHAUST DIAPHRAGM ASS Y PORT STRIPPER PLATE GAUGE CONNECTION PILOT PRESSURE CHAMBER diaphragm assembly The regulator locks up or SCREW throttles at the new output value when the gt feedback force of the top diaphragm assembly equals the
7. 2155 71 1977 4 1447 11 7298 4 8790 2 7298 73 7298 72 1447 13 7298 75 7298 77 7298 76 7298 21 2938 15 7100 2 10342 25 7298 78 7298 63 1977 25 2155 98 3827 30 14870 17 Recommended On Hand Spare Parts Description Adjusting Screw Adjusting Screw Locknut Optional Mounting Nut Bushing Bushing Top Casting Except 40HE100 Top Casting Top Casting 40HE100 only Range Spring 50 psi Brown Range Spring 100 psi Green Top Diaphragm Assembly 40H50 only Top Diaphragm Assembly except 40H50 Nozzle Seat Exhaust Ring Exhaust Ring Diaphragm Assembly Diaphragm Spacer Differential Spring White Valve Plunger Assembly Incl 14 thru 18 amp 20 Valve Plunger Valve Spring Cup Retainer O Ring Retaining Ring Retaining Nut Washer Bottom Forging Diaphragm Center Casting Center Casting Center Casting Assembly 40H50 only incl 8 23A 24 amp 28 Required 2p polos ps aaa ao i b d d d d ee ee Md a I aapa ata aan ao ee me e424 42444442 iS ose sia HAE Jap ai lap apes ere ee Item No 24 25 26 2r 28 29 30 32 33 34 35 36 37 Code CKS CKT FKS HFEA WHW WKA Part No 572 51 118 36 111 20 3175 91 2155 62 10792 10 2938 154 1033 22 2938 1 1447 24 7298 62 10342 26 10342 27 Description Stripper Plate 40H50 only Washer except 40HA50 and 40HAE50
8. ate 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 Is the 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 A copy of the product Service Instruction User s Manual or other technical publication should be at hand The Siemens public Internet site see the table has current revisions of technical literature in Portable Document Format for downloading SD40H e To send an instrument to Siemens for warranty or non warranty service call Repair Service and request a Return Material Authorization RMA IMPORTANT An instrument must be thoroughly cleaned decontaminated to remove any process materials hazardous materials or blood borne pathogens prior to return for repair Read and complete the Siemens RMA form s For support and the location of your local Siemens representative refer to the table below for th
9. e URL of the Process Instrumentation PI portion of the Siemens public Internet site Once at the site click Support in the right column and then Product Support Next select the type of support desired sales technical see the table below documentation or software Online Support Request http www siemens com automation support request Technical Support 1 800 333 7421 8 a m to 4 45 p m eastern time Monday through Friday except holidays Customer Service amp Returns Public Internet Site Technical Publications in PDF 1 800 365 8766 warranty and non warranty http www usa siemens com pi Click the above link to go to the Siemens Internet site and then click Process Instrumentation In the column to the right click Support gt Manuals In the column to the left select the product line e g Pressure or Temperature or Controllers to open navigation and search panes Note Navigation may change as the site evolves Warranty The sales contract contains the entire obligation of Siemens The warranty contained in the contract between the parties is the sole warranty of Siemens Any statements continued herein do not create new warranties or modify the existing warranty Nullmatic is a registered trademark of Siemens Industry Inc All product designations may be trademarks or product names of Siemens Industry Inc or other supplier companies whose use by third parties for their o
10. is 1 4 O D tubing although any scale free piping may be used 1 Blow out all piping before any connections are made to prevent dirt or chips from entering the regulator 2 Use pipe sealant sparingly and then only on the male threads A non hardening sealant is strongly recommended 3 Connect the regulator to a source of clean dry oil free instrument air See Instrument Air Requirements CAUTION Pressure in excess of the maximum value listed in General Specifications to the supply or air loading connection may cause damage SD40H Air Loaded All Others Air Loading Connection Opt 2 13 16 Max Exhaust Connection Opt 5 3 16 Approx Air Supply Restriction Cleaning Wire NOTE 1 All connections are 1 4 N P T except tapped exhaust Connection which is 1 8 N P T when supplied 2 Unless otherwise specified regulator is supplied without tapped exhaust and without air loading connections Dimensions amp Connections 1 4 Max Panel Thickness 21 8 Max 1 8 3 3 4 0 1 32 Dia Hole 3 16 Air Loaded Thru Panel 2 3 8 Max e Air Loaded 25 32 0 1 64 Dia t Hole Thru Panel 2 Dia Panel Mounted Regulator ER aa 2 15 16 9 32 Dia 2 Holes Pipe or Bracket Mounted Figure 1 Dimensions and Mounting INSTRUMENT AIR REQUIREMENTS Connect the regulator to a source of clean dry oil free instrument air Failure to do so will increase the possibi
11. lity 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 suitability 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 may cause the regulator to fail There are many types of synthetic lubricants Some may not be compatible with the materials used in construction of the regulator Wetting of these materials by such an oil mist or vapor may cause them to deteriorate This may ultimately result in failure of the regulator The following materials are in contact with instrument air Aluminum Brass Buna N Delrin Neoprene Stainless Steel and Teflon The requirements for a quality instrument 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 SD40H Particle Size The maximum particle size in the air stream at the instrument should be no larger than 3 microns Dew Point The dew point at line pressure should be at least 10 C 18 F below the minimum
12. on of the gauge connection with respect to the supply and output ports The nozzle seat assembly must be installed with its smooth finish seat facing down to the nozzle The safety release valve where applicable must be positioned on the nozzle seat assembly before the stripper plate is installed Center the nozzle seat assembly over the nozzle before tightening its retaining screws The top diaphragm assembly and the top casting can be located in any position Generally the nameplate on the casting lines up over the gauge connection Changing the Range The range of any Model 40 series regulator may be changed by replacing the range spring differential spring the upper diaphragm assembly and other parts as noted in the parts list Replacing Parts Refer to the parts list s at the back of this instruction when performing maintenance A parts list provides a list of replacement parts and an exploded view of the regulator Service kits containing spare and replacement parts are available from Siemens See the Customer Product Support section to contact Siemens Refer to the Parts List section for kits and recommended on hand spare parts Customer Product Support Support is available through an online Support Request service a link is provided in the table at the end of this section When contacting Siemens for support e Please provide complete product information e For hardware this information is provided on the product namepl
13. red See Graph 1 Air Consumption 0 0 00 cceeeeseeeceeeeeeeeeeeeees See Graph 2 IMOUDTING sited Hattie etait In line pipe mounting bracket mounting and flush panel mounting on panels up to 1 4 thick For a 50 F temperature change isothermal range spring option discontinued The Nullmatic regulator bleeds only the amount of air which passes through the pilot nozzle when there is no demand for output flow The exhaust port starts to close as soon as the flow of regulated air to the output is increased and it closes completely before the pilot plunger valve opens Full pilot flow is then delivered to the output 1 SD40H 400 300 200 REGULATED PRESSURE PSIG 100 AIR CONSUMPTION ON DEAD END SERVICE SCFM O 100 20 300 40 50 SUPPLY PRESSURE PSIG The curves above show the minimum supply pressure required for a desired flow SUPPLY PRESSURE PSIG Graph 1 Maximum Air Flow SCFM Delivered Graph 2 Air Consumption INSTALLATION Mounting Considerations Refer to Figure 1 for mounting dimensions connections and mounting configurations The regulator may be mounted in any position in a reasonably vibration free location CAUTION Exceeding the ambient air temperature limits can adversely affect performance and may cause damage Pneumatic Connections Connections are 1 4 NPT the optional tapped exhaust connection is 1 8 NPT Recommended piping to the regulator
14. supply air 2 Carefully remove retaining nut on bottom forging The valve plunger and plunger spring will drop out when this nut is removed be careful not to lose them The valve plunger must be clean on both the ball and tapered end surfaces If necessary use a non abrasive solvent 3 Clean supply and exhaust seats in the regulator The supply seat is readily accessible the exhaust seat can be reached using a tobacco pipe cleaner Here again use non abrasive solvents 4 Re install parts See the parts list for part orientation Tighten the retaining nut securely Troubleshooting Refer to the Trouble Analysis table to troubleshoot the regulator Trouble Analysis SYMPTOM CAUSE REMEDY No output No air supply Turn on supply air Clogged restriction screw Remove and clean Output cannot be increased to full value Supply air setting too low Raise to recommended value Valve plunger being held open on exhaust seat by a chip pipe scale etc usually detected by a heavy exhaust Remove valve plunger and clean its seats Sluggish output response to increased setting Output flow excessive for air supply setting Raise supply pressure Output flow exceeds specification Consult factory Output at full valve or more and cannot be decreased Regulator piped backwards Detected by an excessively heavy exhaust Re pipe the regulator Direction of flow is shown by arrow on
15. wn purposes could violate the rights of the owners Siemens Industry Inc assumes no liability for errors or omissions in this document or for the application and use of information in this document The information herein is subject to change without notice Procedures in this document have been reviewed for compliance with applicable approval agency requirements and are considered sound practice Neither Siemens Industry Inc nor these agencies are responsible for product uses not included in the approval certification s or for repairs or modifications made by the user SD40H PARTS LIST Siemens Nullmatic Pressure Regulator Models 40 40A and 40X Drawing 7298PL 10 81 Supersedes 8 80 MODEL 40HA MODEL 40H HE a ate E iy Ye tute 4 IN SB A O pe 6 _WHW _ 8 Eth e SO BN AY hs IMPORTANT Service Parts Kits are available for servicing the instrument See the Service Parts Kits section of this instruction Contact Siemens for currently available kits refer to the Customer Product Support section of this instruction Some parts in this Parts List may not be available for separate purchase SD40H Item No 1A 1B 2A 2B 3A 3B 4A 4B 4C 5A 5B 6A 6B 10A 10B 141A 11B 12 13 14 15 16 17 18 19 20 21 22 23A 23B 23C Part No 1447 22 3179 4 1447 41 3603 14 2155 165 3494 4 2155 13 4557 11 3827 7 2155 22 2155 23
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