Emerson S200 Instruction Manual
Contents
1. The frequency of inspection and replacement of parts depends upon the severity of service conditions or the requirements of local state and federal rules and regulations Disassembly to Replace Diaphragm Refer to Figure 5 or 6 1 Remove the closing cap key 4 and turn the adjusting screw key 3 counterclockwise to ease spring compression 2 Remove the adjusting screw and the spring key 2 3 Remove hex nuts key 15 and cap screws key 14 Separate the upper spring case key 1 from the lower casing assembly key 9 Types S204 and S206 Slide the diaphragm and diaphragm plate assembly key 7 away from the body key 21 to unhook the pusher post key 8 from the lever key 10 Lift off the diaphragm and diaphragm plate assembly Unscrew the reset stem key 24 from the pusher post The diaphragm head can now be lifted off the diaphragm plate assembly Reassemble the spring case unit in the reverse order of the above steps Note Before tightening the cap screw or stem into the pusher post place the loosely assembled diaphragm assembly into position in the lower casing being sure that the pusher post is hooked on the lever Rotate the diaphragm so that the diaphragm and lower casing holes are aligned Tighten cap screw or stem Tighten the spring case cap screws finger tight only After replacing the spring and adjusting screw turn the adjusting screw in about half way This procedure2. plate 12 required Disk Holder Assembly For Natural Gas Service For Manufactured Gas 5 8 inch 16 mm and larger Seat Rings Cap Screw Steel Cadmium plate 2 required O Ring Nitrile NBR Seat Ring Aluminum 3 8 inch 9 5 mm Port Diameter 1 2 inch 13 mm Port Diameter 5 8 inch 16 mm Port Diameter 1 inch 25 mm Port Diameter 1 3 16 inch 30 mm Port Diameter Body Cast Iron 1 1 2 NPT 2 NPT NPS 2 DN 50 CL125 FF 125 pounds 57 kg Steel 1 1 2 NPT 2 NPT Reset Stem Steel Type S204 Type S206 Relief Valve Spring Steel Cadmium Plate Type S206 only Back Disk Spring 302 SST Back Disk Holder Assembly Disk Spacer Aluminum For Natural Gas Service For Manufactured Gas 5 8 inch 16 mm and larger Seat Rings Back Body Cap Aluminum Nameplate Aluminum Valve Stem Aluminum Gasket Asbestos Flapper Stem 302 SST Lower Flapper Nylon PA Upper Flapper Nylon PA Seat Ring 302 SST Self Tapping Screw Steel 3 required Spring 302 SST 2 required Screen Monel Snap Ring 302 SST Part Number 1H972935032 1B420428982 1H9748000A2 1B 136324052 1A309324122 1P7349000A2 1J1680X0012 1H974724052 71258770012 1U588409022 1J718509022 1H980509022 1H980709022 1H980809022 13190519012 1H974319012 2K184319012 1K788022012 1K792222012 1H980424272 1H969224272 1H976027012 1A866837022 1H9739000A2 1H973609012 13168309012 1R236109022 11A5497X032 1H973509082 1F826804022 1H976335022 1H97
3. will ensure proper slack in the diaphragm Finish tightening the cap screws Note Take care not to pinch or tear the diaphragm when reassembling Disassembly to Replace Valve Disks and Seat Ring Refer to Figure 5 or 6 1 Remove the bolts key 18 which hold the lower spring casing key 9 to the body key 21 Separate the lower spring casing from the body Check the body O ring key 19 for wear Examine the valve disk key 16 for nicks cuts and other damage Unscrew the disk holder assembly from the valve stem assembly key 13 and replace it with a new part if necessary If the seating edge of the seat ring key 20 is nicked or rough remove the seat ring from Types S204 and S206 SECTION A A Figure 5 Type S204 Regulator Assembly Figure 6 Type S206 Regulator Assembly the body Change to a new part when reassembling the regulator If the seat ring is being replaced with a different sized part change the nameplate to state the new size and maximum inlet pressure Reassemble the regulator in reverse order of the above steps To inspect the back body disk key 27 unscrew the body cap key 20 and the disk assembly can be taken out Parts Ordering The type number seat ring port size and date of manufacture are stamped on the nameplate Always provide this information in any correspondence with your l
4. 6406992 1H976506992 T13609T0012 1H976728982 1H976837022 1E564843122 1E564937022 Types S204 and S206 Industrial Regulators Emerson Process Management Regulator Technologies Inc USA Headquarters McKinney Texas 75069 1872 USA Tel 1 800 558 5853 Outside U S 1 972 548 3574 Asia Pacific Shanghai China 201206 Tel 86 21 2892 9000 Europe Bologna Italy 40013 Tel 39 051 4190611 Middle East and Africa Dubai United Arab Emirates Tel 971 4811 8100 Natural Gas Technologies Emerson Process Management Regulator Technologies Inc USA Headquarters McKinney Texas 75069 1872 USA Tel 1 800 558 5853 Outside U S 1 972 548 3574 Asia Pacific Singapore Singapore 128461 Tel 65 6777 8211 Europe Bologna Italy 40013 Tel 39 051 4190611 Gallardon France 28320 Tel 33 0 2 37 33 47 00 TESCOM Emerson Process Management Tescom Corporation USA Headquarters Elk River Minnesota 55330 2445 USA Tel 1 763 241 3238 Europe Selmsdorf Germany 23923 Tel 49 0 38823 31 0 For further information visit www fisherregulators com The Emerson logo is a trademark and service mark of Emerson Electric Co All other marks are the property of their prospective owners Fisher is a mark owned by Fisher Controls Inc a business of Emerson Process Management The contents of this publication are presented for informational purposes only and while every effort has been made to ensure their accuracy they
5. Instruction Manual Form 1749 January 2010 Types S204 and S206 Types 204 and 206 Gas Regulators Fisher regulators must be installed operated and maintained in accordance with federal state and local codes rules and regulations and Emerson Process Management Regulator Technologies Inc instructions If the regulator vents gas or a leak develops in the system service to the unit may be required Failure to correct trouble could result in a hazardous condition Call a gas service person to service the unit Only a qualified person must install or service the regulator Introduction Scope of the Manual This instruction manual provides instructions and a parts list for Types S204 and S206 gas service regulators Description Types S204 and S206 gas service regulators are typically installed on industrial and commercial applications Both regulators have a low outlet pressure shutoff mechanism that shuts gas flow off if the required minimum outlet pressure cannot be maintained Type S206 also has an internal relief valve that gives partial downstream overpressure protection Specifications The Specifications table lists the specifications for Types S204 and S206 constructions The following information is stamped on the regulator at the factory type number date of manufacture spring range port size maximum inlet pressure maximum operating outlet pressure and outlet pressure which may damage regulator
6. TECT VENT PIPE WITH RAIN CAP e TYPE S204 REGULATOR NPS 2 DN 50 TYPE 289H RELIEF VALVE AJ4698 A1721 Figure 2 Type S204 Regulator Installed with the Vent Pointed Downward and with a Type 289H Relief Valve for High Capacity Relief Figure 3 Reset Lever startup Procedures used in putting this regulator into operation must be planned accordingly if the downstream system is pressurized by another regulator or by a manual bypass If the downstream system is not pressurized by another regulator or manual bypass valve use the following procedure to start up the regulator 1 Slowly open the upstream shutoff valve 2 The low pressure shutoff mechanism has to be reset To do this remove the closing cap key 4 Figure 5 and pull quickly upward on the reset stem key 24 Types S204 and S206 DIAPHRAGM ASSEMBLY PUSHER POST EXTENSION BACK DISK MAIN VALVE DISK f PUSHER POST ASSEMBLY A6197 E INLET PRESSURE E OUTLET PRESSURE ATMOSPHERIC PRESSURE ET SEAT RING f Figure 4 Operational Schematic Note Follow the same procedure if the regulator shuts off during service A lever Part No ORO6172509A Figure 3 is needed to reset the regulators when the outlet pressure setting is 7 inches w c 17 mbar or more 3 Slowly open the d
7. are not to be construed as warranties or guarantees express or implied regarding the products or services described herein or their use or applicability We reserve the right to modify or improve the designs or specifications of such products at any time without notice Emerson Process Management does not assume responsibility for the selection use or maintenance of any product Responsibility for proper selection use and maintenance of any Emerson Process Management product remains solely with the purchaser EMERSON Dr cess Manaaem ant Emerson Process Management Regulator Technologies Inc 1978 2010 All Rights Reserved P rocess M al ag ement
8. d install the regulator so that flow is in the direction of the arrow cast on the body The diaphragm casing assembly can be rotated to any position relative to the body Loosen the two cap screws key 18 Figure 5 in order to rotate the diaphragm casing assembly Do not install the regulator in a location where there can be excessive water accumulation such as directly beneath a downspout If the regulator is used in conjunction with a Type 289H relief valve it should be installed as shown in Figure 2 The outside end of the vent line should be protected with a rainproof assembly The Type 289H should be set 10 inches w c 25 mbar higher than the outlet pressure setting of the regulator up to 30 inches w c 75 mbar reduced pressure For pressure greater than this set the Type 289H 21 inches w c 52 mbar higher than the outlet pressure setting of the regulator The Types S204 and S206 regulators have 1 NPT screened vent openings in the spring case If necessary to vent escaping gas away from the regulator install a remote vent line in the spring case tapping Vent piping should be as short and direct as possible with a Table 1 Inlet Pressure SEAT RING SIZE INLET PRESSURE SETTING PSIG bar INCHES mm Optimum Maximum 3 8 9 5 100 6 9 100 6 9 4 2 13 75 5 2 100 6 9 5 8 16 60 4 1 75 5 2 1 25 20 1 4 30 2 1 1 3 16 30 7 0 48 15 1 0 Table 2 Maximum Outlet Pressure Sett
9. icable standard limitation should not be exceeded Under enclosed conditions or indoors escaping gas may accumulate and be an explosion hazard In these cases the vent should be piped away from the regulator to the outdoors Like most regulators Types S204 and S206 regulators have an outlet pressure rating lower than their inlet pressure rating If actual inlet pressure can exceed the outlet pressure rating outlet overpressure protection is necessary However overpressuring any portion of the regulators beyond the limits in Table 1 may cause leakage damage to the regulator parts or personal injury due to bursting of pressure containing parts Some type of external overpressure protection should be provided if inlet pressure will be high enough to damage downstream equipment Common methods of external overpressure protection include relief valves monitoring regulators shutoff devices and series regulators If the regulator is exposed to an overpressure condition it should be inspected for any damage that may N have occurred Regulator operation below these limits does not preclude the possibility of damage from external sources or from debris in the pipeline Before installing the regulator check for damage which might have occurred in shipment Also check for dirt or foreign matter which may have accumulated in the regulator body or in the pipeline Apply pipe compound to the external threads of the pipeline an
10. ing DIAPHRAGM PLATES Light MAXIMUM OUTLET 30 inches w c 75 mbar Heavy 3 25 psig 0 22 bar 1 Maximum emergency outlet casing pressure for S200 Series is 15 psig 1 0 bar Table 3 Spring Chart SPRING RANGE PART COLOR INCHES W C mbar NUMBER CODE 3 5to5 9 to 12 1D892527022 Brown 5to7 12 to 17 1D892627022 Red 6 5 to 9 5 16 to 24 1D892727012 Black 8 5 to 18 21 to 45 1D893227032 Gray 14 to 30 35 to 75 1D893327032 Dark Green 1 to 2 psig 69 mbar to 0 14 bar 1H975827032 Dark Blue 1 5 to 3 25 psig 0 10 to 0 22 bar 1H975927032 Orange minimum number of bends and elbows The remote vent line should have the largest practical diameter Vent piping on regulators with internal relief Type S206 must be large enough to vent all relief valve discharge to atmosphere without excessive backpressure and resulting excessive pressure in the regulator Periodically check all vent openings to be sure that they are not plugged Maximum outlet pressure settings are shown in Table 2 Outlet pressure more than 2 psi 0 14 bar light diaphragm plate or 3 psi 0 21 bar heavy diaphragm plate above the setpoint may damage internal parts such as the diaphragm plate and valve disk The maximum emergency casing outlet pressure is 15 psig 1 0 bar Startup Pressure gauges should always be used to monitor downstream pressure during Types S204 and S206 3 5 Jy PRO
11. moves closer to the seat ring and reduces gas flow If demand downstream increases pressure under the diaphragm decreases Spring force pushes the pusher post assembly downward the valve disk moves away from the seat ring and the gas flow increases As downstream pressure drops under high demand the diaphragm will drop to its lowest position and the main disk will move to its farthest position from the seat ring This allows the spring in the back disk assembly to seat the back disk against the seat ring and shut off flow This condition is maintained until the regulator is manually reset by quickly pulling upward on the pusher post extension in the spring case The back disk assembly will also close if inlet pressure drops too low even if demand is not high Maintenance To avoid personal injury or equipment damage do not attempt any maintenance or disassembly without first isolating the regulator from system pressure and relieving all internal pressure as described in Shutdown Regulators that have been disassembled for repair must be tested for proper operation before being returned to service Only parts manufactured by Emerson Process Management Regulator Technologies Inc should be used for repairing Fisher regulators Relight pilot lights according to normal startup procedures Due to normal wear or damage that may occur from external sources this regulator should be inspected and maintained periodically
12. ocal Sales Office regarding replacement parts or technical assistance If construction changes are made in the field be sure that the nameplates are also changed to reflect the most recent construction Parts List Key 1 wo 5 7A 7B 10 Description Spring Case Aluminum Pinned for heavy spring Spring Steel Adjusting Screw Aluminum Closing Cap Aluminum Closing Cap Gasket Neoprene CR Lower Spring Seat Aluminum Diaphragm and Head Assembly Use with 1D893327032 and lighter springs Use with 1H975827032 and heavier springs Diaphragm Nitrile NBR Use with 1D893327032 and lighter springs Use with 1H975827032 and heavier springs Diaphragm Head Steel Use with 1D893327032 and lighter springs Use with 1H975827032 and heavier springs Pusher Post Aluminum Type S204 only Lower Casing Assembly Aluminum Lever Steel Recommended Spare Parts Monel is a mark owned by Special Metals Corporation Part Number 4L142308032 1J718699022 See Table 3 1L928608012 1L928308012 1N446206992 1L928708012 1L1544X0012 1L1545x0012 1K978102072 1L154302052 1H977928992 1H978025032 2H980608012 1H9751X0012 1H974028992 Key 11 12 13 14 15 16 18 19 20 21 24 25 26 27 28 30 32 33 34 55 56 57 58 59 60 61 62 Types S204 and S206 Description Pin 303 SST Machine Screw Steel 2 required Valve Stem Assembly Cap Screw Steel 12 required Hex Nut Steel Cadmium
13. ownstream shutoff valve 4 Check all connections for leaks Adjustment The range of allowable pressure settings is stamped on the nameplate If the required setting is not within this range substitute the correct spring as shown in Table 3 If the spring is changed be sure to change the nameplate to indicate the new pressure range A pressure gauge should always be used to monitor downstream pressure while adjustments are being made 1 Remove the closing cap key 4 Figure 5 or 6 2 To increase the outlet setting turn the adjusting screw key 3 clockwise To decrease the outlet setting turn the adjusting screw counterclockwise 3 Replace the closing cap Shutdown Installation arrangements may vary but in any installation it is important that the valves be opened or closed slowly and that the outlet pressure be vented before venting inlet pressure to prevent damage caused by reverse pressurization of the regulator The steps below apply to the typical installation as indicated 1 Slowly close the upstream shutoff valve 2 The back disk assembly in the regulator will shut off as inlet pressure drops Upstream and downstream pressure can then be bled off Principle of Operation Refer to Figure 4 When downstream demand decreases the pressure under the diaphragm increases This pressure overcomes the regulator setting which is set by a spring Through the action of the pusher post assembly the valve disk
14. parts Figure 1 Typical Type S204 Gas Regulator Installation Personal injury or system damage may result if this regulator is installed without appropriate overpressure protection where service conditions could exceed the limits given on the regulator nameplate Regulator installations should be adequately protected from physical damage All vents should be kept open to permit free flow of gas to the atmosphere Protect openings against entrance of rain snow insects or any other foreign material that may plug the vent or vent line On outdoor installations point the spring case vent downward to allow condensate to drain see Figure 2 This minimizes the possibility of freezing and of water or other foreign materials entering the vent and interfering with proper operation EMERSON D400011X012 Types S204 and S206 Specifications Body Size and End Connection Style 1 1 2 or 2 NPT inlet and outlet NPS 2 DN 50 CL125 FF Maximum Allowable Inlet Pressure See Table 1 Maximum Emergency Outlet Pressure 15 psig 1 0 bar Seat Ring Diameters 3 8 1 2 5 8 1 and 1 3 16 inches 9 5 13 16 25 and 30 mm Outlet Pressure Ranges 3 5 inches w c to 3 25 psig 9 mbar to 0 22 bar Temperature Capabilities 20 to 150 F 29 to 66 C Pressure Registration Internal Approximate Weight 22 pounds 10 kg 1 The pressure temperature limits in this Instruction Manual or any appl
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