Emerson 95 Series Pressure Reducing Regulators Instruction Manual
Contents
1. Type 95H 11A5130X012 19 Diaphragm Gasket Types 95L and 95H NPS 3 4 and 1 DN 20 and 25 bodies use composition Type 95HT uses graphite Type 95L 11A5128X012 Use with metal diaphragm Type 95H 11A5131X012 NPS 1 4 body NPS 1 1 2 and 2 Type 95L 1E394004022 Type 95H 11A5527X012 Type 95H 1E393104022 15 Adjusting Screw Steel Type 95HT 1E3931X0012 NPS 1 4 body 1E639928992 NPS 1 2 DN 15 body NPS 1 2 DN 15 body 1D995448702 Type 95L 1E397004022 NPS 1 2 DN 15 body with handwheel 143496428982 Type 95H 1E396104022 NPS 3 4 and 1 DN 20 and 25 bodies 14330828982 Type 95HT 1E3961X0012 NPS 1 1 2 and 2 DN 40 and 50 bodies 14680128992 NPS 3 4 and 1 DN 20 and 25 bodies 16 Cap Screw Steel Type 95L 1E390404022 Type 95L Type 95H 1E399304022 NPS 1 4 body 10 required 14407824052 Type 95HT 1E3993X0012 NPS 1 2 DN 15 body 10 required 14381624052 NPS 1 1 2 and 2 DN 40 and 50 bodies NPS 3 4 and 1 DN 20 and 25 bodies Type 95H 1P787904022 12 required 14336924052 Type 95HT 1P7879X0012 Type 95H 20 Pitot Tube Cast iron bodies NPS 3 4 and 1 DN 20 and 25 bodies NPS 1 4 body 6 required 1A407824052 Copper Types 95L and 95H only 1E399417012 NPS 1 2 DN 15 body 8 required 14381624052 304 Stainless steel 1E399438072 NPS 3 4 and 1 DN 20 and 25 bodies 316 Stainless steel NACE 1E399438092 8 required 1A336924052 NPS 1 1 2 and 2 DN 40 and 50 bodies NPS 1 1 2 and 2 DN 40 and 50 bodies Copper Types 95L and 95H only 1P7856X0032 8 required 1K56842892. USA Tels 1 763 241 3238 1 800 447 1250 Europe Selmsdorf 23923 Germany Tel 49 38823 31 287 Asia Pacific Shanghai 201206 China Tel 86 21 2892 9499 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 International LLC 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 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 Regulator Technologies Inc 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 Regulator Technologies Inc product remains solely with the purchaser Emerson Process Management Regulator Technologies Inc 1954 2015 All Rights Reserved A ae es EMERSON
3. 0 14 to 0 41 1E392527022 Yellow 1 4 5to 15 0 34 to 1 0 1E392627012 Green 13 to 30 0 90 to 2 1 1E392727142 Red 2106 0 14 to 0 41 1E395627022 Yellow 95L 1 2115 5to 15 0 34 to 1 0 1D7455T0012 Green 13 to 30 0 90 to 2 1 1E395727192 Red 2106 0 14 to 0 41 1E398927022 Yellow 3 4 1120 25 5 to 15 0 34 to 1 0 1E399027142 Green 13 to 30 0 90 to 2 1 1E399127162 Red 15 to 30 1 0 to 2 1 1E392527022 Yellow 1 4 25 to 75 1 7 to 5 2 1E392627012 Green 70 to 150 4 8 to 10 3 1E392727142 Red 15 to 30 1 0 to 2 1 1E395627022 Yellow 1 2115 25 to 75 1 7 to 5 2 1D7455T0012 Green 70 to 150 4 8 to 10 3 1E395727192 Red 95H 15 to 30 1 0 to 2 1 1E398927022 Yellow 3 4 1120 25 25 to 75 1 7 to 5 1 1E399027142 Green 70 to 150 4 8 to 10 3 1E399127162 Red 5 to 80 0 34 to 5 5 1E795327082 Light Blue 60 to 120 4 1 to 8 3 1E795427082 Light Gray tebe etd 30 100 to 140 6 9 to 9 7 1E793327082 Yellow 120 to 150 8 3 to 10 3 1P788827082 Black 14 Types 95L 95H 95HP and 95HT Key 11 Regulator Spring Part Numbers continued rat BODY SIZE OUTLET PRESSURE RANGE SPRING PART COR NPS DN psig bar NUMBER 1 4 15 to 100 1 0 to 6 9 14B9941X012 Unpainted 80 to 300 5 5 to 20 7 14B9940X012 Unpainted 1 2115 15 to 100 1 0 to 6 9 14B9943X012 Unpainted 80 to 300 5 5 to 20 7 14B9942X022 Unpainted 95HT 3 4 1120 25 15 to 100 1 0 to 6 9 14B9944X022 Unpainted i i 80 to 300 5 5 to 20 7 14B9945X022
4. 1E399535072 1P7860X00A2 1P7860X00A2 1E391814012 1E395214012 1E398214012 19B9067X022 1E391835132 1E395235132 1E398235132 19B9067X012 1E391835072 1E395235072 1E398235072 19B9067X102 19B9067X092 19B9067X012 1F2113000A2 1F2114000A2 1F2115000A2 1F2113000C2 1F2114000C2 1F2115000C2 1F2114X0082 1F2115000C2 1P785335232 1P7853X00A2 Types 95L 95H 95HP and 95HT Key 1 Regulator Body Part Numbers BODY MATERIAL BODY Cast SIZE Iron Steel Stainless Steel NPS DN NPT NPT SWE CL150 CL300 NPT SWE CL150 CL300 TYPE 95L 1 4 1E391119012 1J127722012 1J127733092 1 2 15 2E394519012 2L908022012 2P518522012 2V5673X0022 20A4569X012 2L908033092 2P5185X0012 2V5673X0012 20A4569X022 3 4 20 2E397419012 2E863722012 2K632722012 2V4262X0012 20A3088X012 2E863733092 2K632733092 2V4262X0022 20A3088X032 1 25 2E397519012 2E863822012 2H160622012 2V3546X00A2 2U7969X0022 2E863833092 2H1606X00A2 2V3546X0012 2U7969X0092 TYPE 95H 1 4 1E391019012 1127322012 1J127333092 1 2 15 1E394319012 2L907722012 2N693922012 16A6787X012 12B5376X012 2L907733092 2N6939X0012 16A6787X022 12B5376X022 3 4 20 2
5. DN 20 and 25 bodies 1F2238000A2 Stainless steel 1P788235072 NPS 1 1 2 and 2 DN 40 and 50 bodies 1V4372X0012 Types 95HP and 95HT Stainless steel 1P788235072 23 Handwheel Zinc NPS 1 2 DN 15 body 19496144012 49 Lockwasher Steel 14487828992 24 Machine Screw Steel handwheel construction 16A5763X012 50 Packing Follower 25 Lockwasher Steel handwheel construction 1A352332992 416 Stainless steel 1P785535232 The following parts are for the NPS 1 1 2 and 2 316 Stainless steel NACE 1P7855X00A2 DN 40 and 50 Types 95H 95HP and 95HT only 304 Stainless steel 1P785535042 30 Pusher Post Stainless steel 51 O ring PTFE 1P785906242 Elastomer seat 416 Stainless steel 1P784935132 52 Spring Stainless steel 1P785737012 Metal seat 54 Inner Valve Base 416 Stainless steel 1P785135132 416 Stainless steel 1U404046172 304 Stainless steel 1P785135042 316 Stainless steel NACE 1U4040X00A2 316 Stainless steel 1P7851X0012 304 Stainless steel 1U404035042 316 Stainless steel NACE 1P7849X00A2 56 NACE Tag 2 2 b b2 2 31 Locknut Steel 1P788724122 57 Tag Wire z2 45 O ring Nitrile NBR Use with Neoprene CR diaphragm 47 Diaphragm Gasket Use with metal diaphragm 2 required Type 95H NPS 1 1 2 to 2 DN 40 to 50 only Composition Type 95HT NPS 1 1 2 to 2 DN 40 to 50 only Graphite Recommended spare parts 10782206992 1P788004022 1P7880X0012 13 Types 95L 95H 95HP and 95HT Key 4 Valve Plug P
6. Diaphragm and Seat Materials TEMPERATURE RANGE MATERIAL oF c Nitrile NBR 40 to 180 40 to 82 Neoprene CR 40 to 180 40 to 82 Fluorocarbon FKM 9 0 to 300 18 to 149 Ethylenepropylene EPDM 40 to 275 40 to 135 Perfluoroelastomer FFKM 0 to 425 18 to 218 Polytetrafluoroethylene PTFE 40 to 400 40 to 204 Stainless Steel 40 to 650 40 to 343 BODY AND SPRING TEMPERATURE RANGE REGULATOR GASE MATERIAL oF C T 95L Cast Iron 40 to 406 40 to 208 Mu Mem Steel 20 to 450 29 to 232 ype Stainless Steel 40 to 450 40 to 232 Steel 20 to 450 29 to 232 Typen Stainless Steel 40 to 450 40 to 232 Steel 20 to 650 29 to 343 Type 95H Stainless Steel 40 to 550 40 to 288 Pressure Setting Adjustment Adjusting screw standard Handwheel Tee handle optional NPS 1 2 DN 15 body has a handwheel all other sizes have tee handles Pressure Registration Internal Shutoff Classification Per ANSI FCI 70 3 2004 Metal Seats Class IV Elastomer Seats Class VI or better PTFE Class IV Approximate Weights Types 95H 95HP and 95HT NPS 1 4 body 4 Ibs 2 kg NPS 1 2 DN 15 body 8 Ibs 4 kg NPS 3 4 and 1 DN 20 and 25 bodies 20 Ibs 9 kg NPS 1 1 2 and 2 DN 40 and 50 bodies 73 Ibs 33 kg Type 95L NPS 1 4 body 6 Ibs 3 kg NPS 1 2 DN 15 body 12 lbs 5 kg NPS 3 4 and 1 DN 20 and 25 bodies 32 Ibs 15 kg 1 The pressure temperature limits in this Instruction Man
7. Maintenance To avoid personal injury property damage or equipment damage caused by sudden release of pressure or explosion of accumulated gas do not attempt any maintenance or disassembly without first isolating the regulator from system pressure and relieving all internal pressure from the regulator Due to normal wear that may occur parts must be periodically inspected and replaced if necessary The frequency of inspection depends on the severity of service conditions This section includes instructions for disassembly and replacement of parts All key numbers refer to Figures 3 4 and 5 1 Unscrew the valve plug guide key 5 from the body key 1 The valve plug spring key 10 and the valve plug key 4 will normally come out of the body along with the valve plug guide On NPS 1 1 2 or 2 DN 40 or 50 units the stem key 6 Figure 5 will also come out of the regulator body Inspect the seating surface of the valve plug key 4 make sure that the elastomer PTFE or polished metal surface of the valve plug is not damaged Replace if damage is noted Inspect the seating edge of the orifice key 3 If damage is noted unscrew the orifice from the body and replace it with a new part Torque per Table 3 If no further maintenance is required reassemble the regulator in the reverse of the above steps When installing the valve plug guide key 5 coat the threads and sealing surface with sealant to ensure an adequate met
8. TUBE USED IN NPS 3 4 AND 1 DN 20 AND 25 SIZES ONLY PARTS NOT SHOWN 13 18 AND 14 TYPE 95L NPS 1 4 2 TO 6 psi 0 14 to 0 41 bar RANGE TYPE 95L WITH METAL DIAPHRAGM NS NEVER SEEZ LS LEAD SEAL Figure 4 95 Series with Metal Seat Assemblies Never Seez is a mark owned by Bostik Corp Parts Ordering Types 95L 95H 95HP and 95HT When corresponding with your local Sales Office about this equipment always reference the equipment serial number or FS number that can be found on the nameplate When ordering replacement parts reference the key number of each needed part as found in the following parts list Separate kits containing all recommended spare parts are available Parts List Note In this parts list parts marked NACE are intended for corrosion resistant service as detailed in the NACE International Standard MR0175 Key Description Parts Kit Included are keys 3 4 10 12 and 19 for All Metal Trim only Types 95H and 95HP For Brass and Neoprene CR Trim NPS 1 4 body NPS 1 2 DN 15 body NPS 3 4 and 1 DN 20 and 25 bodies For 416 Stainless steel and Neoprene CR Trim NPS 1 4 body NPS 1 2 DN 15 body NPS 3 4 and 1 DN 20 and 25 bodies NPS 1 1 2 and 2 DN 40 and 50 bodies For All Metal Trim NPS 1 4 body NPS 1 2 DN 15 body NPS 3 4 and 1 DN 20 and 25 bodies NPS 1 1 2 and 2 DN 40 and 50 bodies Extra parts for NPS 1 1 2 and 2 DN 40 and 50 bodies include keys 47 51
9. Unpainted 15 to 100 1 0 to 6 9 17B1704X012 Unpainted a a 60 to 260 4 1 to 17 9 17B1705X012 Unpainted 1 4 15 to 100 1 0 to 6 9 14B9941X012 Unpainted 80 to 400 5 5 to 27 6 14B9940X012 Unpainted 1 2115 15 to 100 1 0 to 6 9 14B9943X012 Unpainted 80 to 400 5 5 to 27 6 14B9942X022 Unpainted 95HP 3 4 1120 25 15 to 100 1 0 to 6 9 14B9944X022 Unpainted d 80 to 400 5 5 to 27 6 14B9945X022 Unpainted 15 to 100 1 0 to 6 9 17B1704X012 Unpainted 1212 2140 20 60 to 300 4 1 to 20 7 17B1705X012 Unpainted Key 12 Diaphragm Part Numbers DIAPHRAGM MATERIAL BODY SIZE NPS DN 302 Stainless Steel Neoprene CR Fluorocarbon FKM Monel 2 Required P 2 Required 2 Required TYPE 95L 1 4 1E393936012 1E394102112 1E3941024029 1E393941012 1 2115 1E396936012 1E397102112 1E397102402 1E396941012 3 4 and 1 20 and 25 1E390536012 1E390302112 1E390302332 1E390541012 TYPE 95H 1 4 1E392836012 1E393502112 1E393502402 1E392841012 1 2115 1E395836012 1E396602112 1E396602402 1E395841012 3 4 and 1 20 and 25 1E399236012 1E399902112 1E399902402 1E399241012 1 1 2 and 2 40 and 50 1P787836012 1P788102192 11A1347X012 1P7878X00A2 TYPE 95HP M4 7 0 0 fI 1E393502112 1E3935024020 12 115 1E396602112 1E396602402 3 4and1 20and25 1E399902112 1E399902402 1 1 2and2 40and50 1P788102192 11A41347X012 ff TYPE 95HT 1 4 1E392836012 0 00 ce 00 0 00
10. 0 c 1 2115 1E395836012 0 00 ce 0 00 0 3 4 and 1 20 and 25 1E399236012 0 00 cf 00 00 0 1 1 2 and 2 40 and 50 1P787836012 0 00 ce 0 000 c 1 Only one diaphragm required for Type 95L with 2 to 6 psig 0 14 to 0 41 bar spring range 2 Only one diaphragm required for NPS 1 4 size Monel is a mark owned by Special Metals Corporation 15 Types 95L 95H 95HP and 95HT Industrial Regulators Emerson Process Management Regulator Technologies Inc USA Headquarters McKinney Texas 75070 USA Tel 1 800 558 5853 Outside U S 1 972 548 3574 Asia Pacific Shanghai 201206 China Tel 86 21 2892 9000 Europe Bologna 40013 Italy Tel 39 051 419 0611 Middle East and Africa Dubai United Arab Emirates Tel 971 4811 8100 For further information visit www fisherregulators com Natural Gas Technologies Emerson Process Management Regulator Technologies Inc USA Headquarters McKinney Texas 75070 USA Tel 1 800 558 5853 Outside U S 1 972 548 3574 Asia Pacific Singapore 128461 Singapore Tel 65 6770 8337 Europe Bologna 40013 Italy Tel 39 051 419 0611 Chartres 28008 France Tel 33 2 37 33 47 00 Middle East and Africa Dubai United Arab Emirates Tel 971 4811 8100 TESCOM Emerson Process Management Tescom Corporation USA Headquarters Elk River Minnesota 55330 2445
11. 012 2L907733092 2N6939X0012 16A6787X022 12B5376X022 3 4 20 2E408422012 2H852022012 2V9941X0012 20A4013X012 2E408433092 2H8520X00A2 2V9941X0032 20A4013X022 1 25 2E408522012 2F485522012 2V3879X00A2 2V3944X0012 2E408533092 2F4855X0012 2V3879X0012 2V3944X0042 1 1 2 40 3P784322012 3V388022012 1V4939X0012 2V3881X0012 3P784333092 3V388033092 1V4939X0032 2V3881X0062 2 50 3P784222012 3V279622012 2V5703X0012 20A1091X012 3P784233092 3V2796X0012 2V5703X0032 20A1091X022 Key Description Part Number Key Description Part Number 6 Stem continued 8 Lower Spring Seat continued 304 Stainless steel Types 95HP and 95HT only NPS 1 1 2 and 2 DN 40 and 50 1P785335042 NPS 1 4 body 14B9947X012 7 Stem Guide Bushing NPS 1 2 DN 15 body 14B9948X012 416 Stainless steel NPS 3 4 and 1 DN 20 and 25 bodies 17B8733X012 NPS 1 4 and 1 2 DN 15 bodies 1E392235132 NPS 1 1 2 and 2 DN 40 and 50 bodies 1P787724152 NPS 3 4 and 1 DN 20 and 25 bodies 1E398535132 9 Upper Spring Seat Steel NPS 1 1 2 and 2 DN 40 and 50 bodies 1P785435132 Types 95L and 95H only 304 Stainless steel NPS 1 4 body 1B798525062 NPS 1 1 2 and 2 DN 40 and 50 bodies 1P785435042 NPS 1 2 DN 15 body 1D667125072 316 Stainless steel NACE NPS 3 4 and 1 20 and 25 bodies 1E398725072 NPS 1 4 and 1 2 DN 15 bodies 1E392235072 NPS 1 1 2 and 2 body 40 and 50 bodies 1P787624092 NPS 3 4 and 1 DN 20 and 2
12. 4 41 15 to 30 1 0 to 2 1 0 306 7 77 4 00 102 1E398927022 Yellow 20 25 25to 75 1 7 to 5 1 0 343 8 71 4 00 102 1E399027142 Green A 70 to 150 4 8 to 10 3 0 406 10 3 4 00 102 1E399127162 Red 5 to 80 0 34 to 5 5 0 531 13 5 6 56 167 1E795327082 Light Blue 1 1 2 2 60 to 120 4 1 to 8 3 0 562 14 3 6 56 167 1E795427082 Light Gray 40 50 100 to 140 6 9 to 9 7 0 593 15 1 6 50 165 1E793327082 Yellow 120 to 150 8 3 to 10 3 0 656 16 7 6 56 167 1P788827082 Black 4 4 15 to 100 1 0 to 6 9 0 192 4 88 1 96 49 8 14B9941X012 Unpainted 80 to 300 5 5 to 20 7 0 282 7 16 1 96 49 8 14B9940X012 Unpainted 1 2115 15 to 100 1 0 to 6 9 0 282 7 16 2 50 63 5 14B9943X012 Unpainted 95HT 80 to 300 5 5 to 20 7 0 375 9 52 2 50 63 5 14B9942X022 Unpainted 3 4 1 15 to 100 1 0 to 6 9 0 437 11 1 4 03 102 14B9944X022 Unpainted 20 25 80 to 300 5 5 to 20 7 0 562 14 3 4 03 102 14B9945X022 Unpainted 1 1 2 2 15 to 100 1 0 to 6 9 0 625 15 9 6 70 170 17B1704X012 Unpainted 40 50 60 to 260 4 1 to 17 9 0 812 20 6 6 70 170 17B1705X012 Unpainted 4 4 15 to 100 1 0 to 6 9 0 192 4 88 1 96 49 8 14B9941X012 Unpainted 80 to 400 5 5 to 27 6 0 282 7 16 1 96 49 8 14B9940X012 Unpainted 1 2115 15 to 100 1 0 to 6 9 0 282 7 16 2 50 63 5 14B9943X012 Unpainted 95HP 80 to 400 5 5 to 27 6 0 375 9 52 2 50 63 5 14B9942X022 Unpainted 3 4 1 15 to 100 1 0 to 6 9 0 437 11 1 4 03 102 14B9944X022 Unpainted 20 25 80 to 400 5 5 to 27 6 0 562 14 3 4 03 102 14B9945X022 Unpainted 1 1 2 2 15 to 100 1 0 to 6 9 0 625 15 9 6 70 1
13. 5 bodies 1E398535072 Types 95HP and 95HT only NPS 1 1 2 and 2 DN 40 and 50 bodies 1P7854X00A2 NPS 1 4 body 14B9950X012 8 Lower Spring Seat NPS 1 2 DN 15 body 14B9951X012 Type 95H only NPS 3 4 and 1 DN 20 and 25 bodies 14B9952X012 NPS 1 4 body 1E392309012 NPS 1 1 2 and 2 DN 40 and 50 bodies 1P787624092 NPS 1 2 DN 15 body 1E395408012 10 Valve Plug Spring NPS 3 4 and 1 DN 20 and 25 bodies 1E398608012 Stainless steel NPS 1 1 2 and 2 DN 40 and 50 bodies 1P787724152 NPS 1 4 body 1E392437022 NPS 1 2 DN 15 body 1E395537022 NPS 3 4 and 1 DN 20 and 25 bodies 1E398837022 NPS 1 1 2 and 2 DN 40 and 50 bodies 1P785837012 10 38B3498 Types 95L 95H 95HP and 95HT E OG a A I gt i 38B3499 A ELASTOMER SEAT a7 9 METAL DIAPHRAGMS SPRING KEY 12 KEY 11 S3 S NNNNNSNNNNNS amp amp amp amp C9 9 amp 9 9 amp CJ C2 9 G9 9 9 S METAL SEAT Figure 5 95H Series NPS 1 1 2 and 2 DN 40 and 50 Sizes Assemblies Also Typical of 95HT Types 95L 95H 95HP and 95HT Key 2 Spring Case Part Numbers BODY SIZE VENTSILE TYPE 95L TYPE 95H NPS DN Cast Iron Steel Stainless Steel Cast Iron Steel Stainless Steel T Drilled 2E391319012 2J127922012 2J1279X0022 2E391219012 23127522012 2J127
14. 5HT CONTROL SPRING DIAPHRAGM HEAD STEM ASSEMBLY ASSEMBLY PITOT TUBE D ee VALVE PLUG SPRING GG INLET PRESSURE EE OUTLET PRESSURE lt ATMOSPHERIC PRESSURE SPRING METAL DIAPHRAGMS EC TYPE 95L WITH 2 METAL DIAPHRAGMS ALSO TYPICAL OF TYPE 95H OR 95HT EXCEPT ONLY TYPE 95L NPS 1 4 2 TO 6 psi 0 14 to 0 41 bar RANGE SPRING METAL DIAPHRAGM TYPE 95L NPS 1 4 2 TO 6 psi 0 14 to 0 41 bar RANGE WITH METAL DIAPHRAGM Figure 2 Type 95L with Metal Seat and Diaphragm Operational Schematic Also Typical of Type 95H or 95HT Types 95L 95H 95HP and 95HT different springs available Body sizes are available from NPS 1 4 through 1 DN 25 with a variety of end connections The standard orifice sizes are 1 4 3 8 and 9 16 in 6 4 9 5 and 14 mm diameter dependent on body sizes Type 95H Basically the same as Type 95L but permits higher outlet pressure ranges from 15 to 150 psig 1 0 to 10 3 bar for the NPS 1 4 1 2 3 4 and 1 DN 15 20 and 25 sizes Also available in NPS 1 1 2 and 2 sizes with a 1 1 16 in 27 mm orifice to give outlet pressure ranges from 5 to 150 psig 0 34 to 10 3 bar Type 95HP Basically the same as Type 95H but permits even higher outlet pressure ranges from 15 to 400 psig 1 0 to 27 6 bar Type 95HT Basically the same as Type 95H but permits higher outlet pressures at higher temperatures Outlet pressure ranges are available from 15 to 300 psig 1 0
15. 5X0012 Tapped 2L442822012 2L4428X0012 2L442919012 2L443022012 2L4430X0012 3s Drilled 39496319012 3L416122012 3L4161X0022 2J496219012 2L416322012 2L416333092 Tapped 3L442119012 3L442222012 3L4422X0012 2L441919012 2L4420X0012 B oC Drilled 4E397919012 4E592922012 4E592933092 3E397819012 3E408722012 3E4087X0012 E i Tapped 4L461019012 4L460922012 4L4609X0032 3L460819012 3L460722012 3L4607X0022 1 1 2 or 2 40 or 50 Tapped ese 9 pem EIERRERERRETM pisryssrsas 4P784019012 3P790422012 3P7904X0012 Key Description Part Number Key Description Part Number 10 Valve Plug Spring continued 16 Cap Screw Steel continued NACE Inconel Types 95HP and 95HT NPS 1 4 body 19A2862X012 NPS 1 4 body 6 required 1A3917X0132 NPS 1 2 DN 15 body 19A2861X012 NPS 1 2 DN 15 body 8 required 1A3816X0242 NPS 3 4 and 1 DN 20 and 25 bodies 1P8443X0012 NPS 3 4 and 1 DN 20 and 25 bodies NPS 1 1 2 and 2 DN 40 and 50 bodies 19A7371X012 8 required 1A3418X0362 11 Regulator Spring See Following Table NPS 1 1 2 and 2 DN 40 and 50 bodies 12 Diaphragm See Following Table 8 required 1K5684X0222 14 Diaphragm Protector PTFE 17 Locknut Steel NPS 1 4 body NPS 1 4 body 1A352224122 Type 95L 11A5126X012 NPS 1 2 DN 15 body 1A353724122 Type 95H 11A5129X012 NPS 3 4 and 1 DN 20 and 25 bodies 14319224122 NPS 1 2 DN 15 body NPS 1 1 2 and 2 DN 40 and 50 bodies 14368124112 Type 95L 11A5127X012 18 Drive Screw Stainless steel 2 required 14368228982
16. 70 17B1704X012 Unpainted 40 50 60 to 300 4 1 to 20 7 0 812 20 6 6 70 170 17B1705X012 Unpainted Table 2 Maximum Cold Working Pressures of Body Size and Material BODY AND SPRING MAXIMUM INLET MAXIMUM OUTLET REGULATOR BODY SIZE NPS CASE MATERIAL PRESSURE psig bar PRESSURE psig bar Cast Iron 250 17 2 50 3 4 Type 95L All Sizes Steel 300 20 7 125 8 6 Stainless Steel 300 20 7 125 8 6 Cast Iron 250 17 2 250 17 2 Type 95H All Sizes Steel 300 20 7 300 20 7 Stainless Steel 300 20 7 300 20 7 Steel 600 41 4 600 41 4 Pee esr piat Stainless Steel 600 414 550 37 9 Steel 600 41 4 600 41 4 T 95HT TOSS Stainless Steel 600 41 4 550 37 9 e s PAG Steel 600 414 450131 0 i i Stainless Steel 600 41 4 450 31 0 1 The pressure limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded 2 Temperature and or the body end connection may decrease these maximum pressures Table 3 Torque Specifications BODY SIZE SPRING CASE BOLT ORIFICE PLUG GUIDE NPS DN Ft Lbs Nem 1 4 6 to 8 8 1 to 11 8 to 12 11 to 16 42 to 58 57 to 79 1 2115 10 to 13 13 to 18 29 to 35 39 to 47 70 to 90 95 to 122 3 4 1 20 25 24 to 30 33 to 41 33 to 42 45 to 57 130 to 160 176 to 217 1 1 2 2 40 50 40 to 50 54 to 68 140 to 170 190 to 230 170 to 200 230 to 271 1 Reduce spring case bolt s torque by 3096 when using Ethylenepropylene EPDM diaphragms Types 95L 95H 95HP and 9
17. 82 304 Stainless steel 1P785638072 Steel or Stainless steel bodies 316 Stainless steel NACE 1P7856X0012 NPS 1 4 body 6 required 1A391724052 21 Diaphragm Head Assembly Type 95L only NPS 1 2 DN 15 body 8 required 1A381624052 Aluminum and Stainless steel NPS 3 4 and 1 DN 20 and 25 bodies NPS 1 4 body 1E3936X0012 8 required 14341824052 NPS 1 2 DN 15 body 1E3967X0012 NPS 1 1 2 and 2 DN 40 and 50 bodies NPS 3 4 and 1 DN 20 and 25 bodies 1E3907X0012 8 required 1K568428982 Recommended spare parts Inconel is a mark owned by Special Metals Corporation 12 Types 95L 95H 95HP and 95HT Key 2 Spring Case Part Numbers continued TYPE 95HP TYPE 95HT BODY SEES VENT STYLE NPS DN Steel Stainless Steel Steel Stainless Steel da Drilled 2J127522012 2J1275X0012 2J127522012 2J1275X0012 Tapped 2L443022012 2L4430X0012 2L443022012 2L4430X0012 irae Drilled 2L416322012 2L416333092 2L416322012 2L416333092 Tapped 2L4420X0012 2L4420X0012 Drilled 3E408722012 3E4087X0012 3E408722012 3E4087X0012 3 4 or 1 20 or 25 Tapped 3L460722012 3L4607X0022 3L460722012 3L4607X0022 1 1 2 or 2 40 or 50 Tapped 3P790422012 3P7904X0012 3P790422012 3P7904X0012 Key Description Part Number Key Description Part Number 22 Adjusting Screw Assembly 48 Diaphragm Head 2 required Steel for tee handle construction Type 95H NPS 1 4 body 1F2236000A2 Steel 1P788225012 NPS 3 4 and 1
18. E397219012 2E408422012 2H852022012 2V9941X0012 20A4013X012 2E408433092 2H8520X00A2 2V9941X0032 2044013X022 1 25 2E397319012 2E408522012 2F485522012 2V3879X00A2 2V3944X0012 2E408533092 2F4855X0012 2V3879X0012 2V3944X0042 1 1 2 40 3P784319012 3P784322012 3V388022012 1V4939X0012 2V3881X0012 3P784333092 3V388033092 1V4939X0032 2V3881X0062 2 50 3P784219012 3P784222012 3V279622012 2V5703X0012 20A1091X012 3P784233092 3V2796X0012 2V5703X0032 20A1091X022 TYPE 95HP 3 4 larran teni 14127322012 1J127333092 1 2 15 2L907722012 2N693922012 16A6787X012 12B5376X012 2L907733092 2N6939X0012 16A6787X022 12B5376X022 3 4 20 2E408422012 2H852022012 2V9941X0012 20A4013X012 2E408433092 2H8520X00A2 2V9941X0032 20A4013X022 1 25 2E408522012 2F485522012 2V3879X00A2 2V3944X0012 2E408533092 2F4855X0012 2V3879X0012 2V3944X0042 1 1 2 40 3P784322012 3V388022012 1V4939X0012 2V3881X0012 3P784333092 3V388033092 1V4939X0032 2V3881X0062 2 50 3P784222012 3V279622012 2V5703X0012 20A1091X012 3P784233092 3V2796X0012 2V5703X0032 20A1091X022 TYPE 95HT 44 14127322012 1J127333092 1 2 15 2L907722012 2N693922012 16A6787X012 12B5376X
19. Instruction Manual Form 1151 February 2015 Types 95L 95H 95HP and 95HT Pressure Reducing Regulators IC A FUK EST W1888 W1888 Types 95L 95H 95HP and 95HT W5652 Figure 1 Type 95L NPT Body Left Type 95H NPT Body Middle and Type 95H Flanged Body Right Pressure Reducing Regulators Failure to follow these instructions or to properly install and maintain this equipment could result in an explosion fire and or chemical contamination causing property damage and personal injury or death 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 www fisherregulators com Call a gas service person to service the unit Only a qualified person must install or service the regulator Introduction Types 95L 95H 95HP and 95HT direct operated pressure regulators are suitable for pressure control of steam air gas water oil and similar fluids requiring constant outlet pressures between 2 and 400 psig 0 14 and 27 6 bar Typical 95L and 95H regulators are shown in Figure 1 Description Type 95L Pressure reducing regulator suitable for controlling many gases and liquids Cast iron ste
20. al to metal seal Reassembly torque per Table 3 If diaphragm damage is suspected or to inspect the diaphragm or other internal parts loosen the locknut key 17 and turn the adjusting screw key 15 to remove all spring compression Steps 5 and 6 apply to Type 95L and sizes NPS 1 4 to 1 DN 25 of the 95H Series If the unit being disassembled is an NPS 1 1 2 to 2 DN 40 and 50 size Type 95H HP or HT proceed to steps 7 and 8 Remove the diaphragm case cap screws key 16 and lift off the spring case key 2 Remove the upper spring seat key 9 and regulator spring key 11 On NPS 1 4 to 1 DN 25 sizes Type 95H units only remove the lower spring seat key 8 On Type 95L units remove the diaphragm head assembly key 21 Remove the diaphragm s and examine for damage Replace if damage is noted Note that if the diaphragm is metal two diaphragms should be used except for Type 95L NPS 1 4 with 2 to 6 psi 0 14 to 0 41 bar spring range which uses only one metal diaphragm Remove the diaphragm diaphragm head assembly It can be disassembled for inspection of the diaphragm key 12 and two small diaphragm gaskets key 47 or O ring key 45 Remove the locknut key 31 from the pusher post key 30 and separate the assembly An O ring is used to seal around the pusher post if an elastomer diaphragm is used and the gaskets are used with stainless steel diaphragm s Unscrew and remove the stem guide bushin
21. and 52 Type 95L For Brass and Neoprene CR Trim NPS 1 4 body NPS 1 2 DN 15 body NPS 3 4 and 1 DN 20 and 25 bodies For 416 Stainless steel and Neoprene CR Trim NPS 1 4 body NPS 1 2 DN 15 body NPS 3 4 and 1 DN 20 and 25 bodies For All Metal Trim Trim 1 or 4A NPS 1 4 body NPS 1 2 DN 15 body NPS 3 4 and 1 DN 20 and 25 bodies Type 95HT All Metal Trim NPS 1 4 body NPS 1 2 DN 15 body NPS 3 4 and 1 DN 20 and 25 bodies NPS 1 1 2 and 2 DN 40 and 50 bodies 1 Regulator Body 2 Spring Case Recommended spare parts Part Number R95HX000012 R95HX000022 R95HX000032 R95HX000102 R95HX000112 R95HX000122 R95HX000042 R95HX000052 R95HX000062 R95HX000072 R95HX000082 R95LX000012 R95LX000022 R95LX000032 R95LX000102 R95LX000112 R95LX000122 R95LX000042 R95LX000052 R95LX000062 R95HTX00012 R95HTX00022 R95HTX00032 R95HTX00042 See Following Table See Following Table Key Description 3 Orifice Metal Seat Types 95L 95H and 95HT 416 Stainless steel NPS 1 4 body NPS 1 2 DN 15 body NPS 3 4 and 1 DN 20 and 25 bodies NPS 1 1 2 and 2 DN 40 and 50 bodies 316 Stainless steel NPS 1 4 body NPS 1 2 DN 15 body NPS 3 4 and 1 DN 20 and 25 bodies NPS 1 1 2 and 2 DN 40 and 50 bodies Brass NPS 1 1 2 and 2 Elastomer Seat Types 95L 95H and 95HP Brass Types 95L and 95H only NPS 1 4 body NPS 1 2 DN 15 body NPS 3 4 and 1 DN 20 and 25 bodies NPS 1 1 2 and 2 DN 40 and 50 bodies 416 S
22. art Numbers VALVE PLUG MATERIAL BODY SIZE NPS DN 1 4 1 2115 3 4 and 1 20 and 25 1 1 2 and 2 40 and 50 Metal Seat Types 95L 95H and 95HT 416 SST 1E391746172 1E395146172 1E398146172 1U403746172 316 SST 1E391735162 1E395135072 1E398135072 1U4037X0012 304SST ween eee 0 0 00 c2 00 p 000 f21 2 1U403735042 Bras J J 1E395146222 1E398146222 1U403746172 Elastomer Seat Types 95L 95H and 95HP Brass Neoprene CR 1E3933000C2 1E3963000A2 1E3996000A2 1U4039X0052 416 SST Neoprene CR 1E3933000E2 1E3963000B2 1E39960008B2 316 SST FKM 1E3933X0242 1E3963X0192 1E3996X0342 1U4039X0182 316 SST Neoprene CR NACE 1E3933X0012 1E3963X0012 1E3996X0012 1U4039X0082 416SST EPDM 1E3963X0182 vm eee ee Ad6SST Nie NBR emesmxmeT4o0 0 uem 9 00 lem Ie see 1U4039000A2 Brass FKM 1E3933X0082 1E3963X0072 1E3996X0072 416 SST FKM 1E3933X0102 1E3963X0092 1E3996X0092 1U4039X00A2 316 SST FKM NACE 1E3933X0092 1E3963X0082 1E3996X0082 1U4039X0102 Brass iY ek cesta 4E3963X00A2 XemRa 227 RE Brass PTFE 1E3933X0032 1E3963X0022 1E3996xX0022 416 SST PTFE 1E3933000A2 1E3963000D2 1E3996000E2 316 SST PTFE 1E3933X0022 1E3963X00B2 1E3996000D2 1U4039X00B2 Key 11 Regulator Spring Part Numbers OUTLET PRESSURE RANGE ee 3 koc E psig bar 2106
23. el or stainless steel bodies are available Outlet pressure range is from 2 to 30 psig 0 14 and 2 1 bar with three ey EMERSON D100256X012 Types 95L 95H 95HP and 95HT Specifications This section lists the specifications for the Types 95L 95H 95HP and 95HT regulators Factory specification are stamped on the nameplate fastened on the regulator at the factory Available Configurations Type 95L Low pressure regulator for 2 to 30 psig 0 14 to 2 1 bar outlet pressures Type 95H High pressure regulator for 5 to 150 psig 0 34 to 10 3 bar outlet pressures Maximum Temperature Ranges of Body Materials Type 95HP High pressure regulator for 15 to 400 psig 1 0 to 27 6 bar outlet pressures soft seated Type 95HT High pressure high temperature regulator for 15 to 300 psig 1 0 to 20 7 bar outlet pressures metal seat and up to 650 F 343 C Body and Orifice Sizes NPS 1 4 body 1 4 in 6 4 mm orifice NPS 1 2 DN 15 body 3 8 in 9 5 mm orifice NPS 3 4 and 1 DN 20 and 25 bodies 9 16 in 14 mm orifice NPS 1 1 2 and 2 DN 40 and 50 bodies 1 1 16 in 27 mm orifice End Connection Styles NPT ASME flanged all sizes are fabricated with slip on flanges and are 14 in face to face EN flanged 356 mm face to face CL150 RF CL300 RF PN 16 25 40 or SWE Maximum Cold Working Pressures of Body Size and Material See Table 2 Outlet Pressure Ranges See Table 1 Maximum Temperature Ranges of
24. g key 7 An O ring key 51 held in place by the packing follower key 50 can then be examined for damage With diaphragm s removed check to be sure the pressure registration hole pitot tube key 20 in NPS 3 4 DN 20 and larger sizes is completely open and free of all obstructions Types 95L 95H 95HP and 95HT PITOT TUBE USED IN NPS 3 4 AND 1 DN 20 AND 25 SIZES ONLY 30A6997 PARTS NOT SHOWN 13 18 AND 14 NS NEVER SEEZ LS LEAD SEAL Figure 3 Type 95L with Elastomer Seat NPS 1 4 to 1 DN 25 Sizes Assembly 10 If the unit has metal diaphragms 6 psi 0 14 to 0 41 bar outlet setting which uses only one metal diaphragm The raised surfaces of the metal diaphragms should be placed in the unit so that they are facing toward the a Applicable only for the lower diaphragm head of Type 95H HT NPS 1 1 2 to 2 Find the pusher post key 30 and place on a assembler toward the spring except only when surface with the larger flat surface down and one diaphragm is being used then the raised the thread stem up metal diaphragm pusher surface should be facing down towards the post has a recessed diameter in the bottom body See Figures 2 and 4 as references surface Then find one smaller elastomer or graphite gaskets key 47 and fit it over the threaded end of the pusher post Find and take one of the diaphragm heads and slip it over the threaded end of the pusher post with the 11 Reassemble in
25. sure condition it should be inspected for any damage that may have occurred Startup The regulator is set at the factory for the setpoint specified on the order so no initial adjustment should be required to give the desired results With proper installation completed and relief valves properly adjusted slowly open the upstream and downstream shutoff valves Types 95L 95H 95HP and 95HT Adjustment The factory setting of the regulator can be varied within the pressure range stamped on the nameplate To change the outlet pressure loosen the locknut key 17 Figure 3 4 or 5 and turn the adjusting screw key 15 Figure 3 4 or 5 clockwise to increase outlet pressure or counterclockwise to decrease it Monitor the outlet pressure with a test gauge during the adjustment Tighten the locknut to maintain the desired setting All regulator springs can be backed off to provide zero outlet Recommended outlet pressure ranges available maximum inlet pressures and temperatures and color codes of the respective springs are shown in Tables 1 and 2 Shutdown Close the upstream shutoff valve Close downstream shutoff valve Open bleed valve between the regulator and the downstream shutoff valve Without changing regulator spring adjustment all pressure between the upstream and downstream shutoff valves will be released through the bleed valve since the Type 95L or 95H regulator opens in response to the decreased outlet pressure
26. tainless steel NPS 1 4 body NPS 1 2 DN 15 body NPS 3 4 and 1 20 and 25 bodies NPS 1 1 2 and 2 DN 40 and 50 bodies 316 Stainless steel NACE NPS 1 4 body NPS 1 2 DN 15 body NPS 3 4 and 1 DN 20 and 25 bodies NPS 1 1 2 and 2 DN 40 and 50 bodies NPS 1 1 2 and 2 DN 40 and 50 bodies NACE See Following Table 4 Valve Plug 5 Valve Plug Guide NPS 1 4 body NPS 1 2 DN 15 body NPS 3 4 and 1 DN 20 and 25 bodies NPS 1 1 2 and 2 DN 40 and 50 bodies 416 Stainless steel NPS 1 4 body NPS 1 2 DN 15 body NPS 3 4 and 1 DN 20 and 25 bodies NPS 1 1 2 and 2 DN 40 and 50 bodies 316 Stainless steel NACE NPS 1 4 body NPS 1 2 DN 15 body NPS 3 4 and 1 DN 20 and 25 bodies NPS 1 1 2 and 2 DN 40 and 50 bodies 304 Stainless steel NPS 1 1 2 and 2 DN 40 and 50 bodies Type 95H Type 95HP HT 6 Stem Assembly 416 Stainless steel NPS 1 4 body NPS 1 2 DN 15 body NPS 3 4 and 1 DN 20 and 25 bodies 316 Stainless steel NPS 1 4 body NPS 1 2 body NPS 3 4 and 1 316 Stainless steel NACE NPS 1 2 DN 15 body NPS 3 4 and 1 DN 20 and 25 bodies 6 Stem 416 Stainless steel NPS 1 1 2 and 2 DN 40 and 50 bodies 316 Stainless steel NACE NPS 1 1 2 and 2 DN 40 and 50 bodies Part Number 1E391646172 1E395046172 1E398046172 2P787046172 1E391635072 1E395035072 1E398035072 2P787035072 2P787046172 1E393214012 1E396214012 1E399514012 1P7860X0092 1E393235132 1E396235132 1E399535132 1P786035132 1E393235072 1E396235072
27. the reverse of the above procedures Lubricate the upper spring seat and the exposed threads of the adjusting screw with Anti Seize lubricant chamfered side of the diaphragm head toward Before tightening cap screws key 16 be sure to the gasket Take a second gasket and place it install the adjusting screw if completely removed over the threaded end of the pusher post on top and turn it down so that diaphragm slack is of the diaphragm head obtained This allows proper positioning of the diaphragm to permit full travel of the valve plug Torque diaphragm cap screws per Table 3 Complete reassembly procedures and turn the adjusting screw to produce the desired outlet pressure Tighten the locknut to maintain the desired setting b Replace the large diaphragm gasket key 19 on the surface of the body that will support the diaphragms There will be two diaphragms used per regulator except for 95L NPS 1 4 with 2 to Never Seez is a mark owned by Bostik Corp Types 95L 95H 95HP and 95HT METAL DIAPHRAGMS KEY 12 a EC SPRING KEY 11 TYPE 95H WITH 2 METAL DIAPHRAGMS PITOT TUBE USED IN NPS 3 4 AND 1 DN 20 AND 25 SIZES ONLY 30A7000 TYPE 95H METAL DIAPHRAGMS KEY 12 ae EC SPRING KEY 11 TYPE 95L WITH 2 METAL DIAPHRAGMS EXCEPT ONLY TYPE 95L NPS 1 4 2 TO 6 psi 0 14 to 0 41 bar RANGE 19 SPRING 21 kEv41 METAL DIAPHRAGM KEY 12 10 pce 30A6996 B 20 PITOT
28. to 20 7 bar and temperatures up to 650 F 343 C Principle of Operation The 95 Series refer to Figure 2 is a direct operated regulator Downstream pressure is registered internally through the body to the under side of the diaphragm When the downstream pressure is at or above the set pressure the disk is held against the orifice and there is no flow through the regulator When demand increases downstream pressure drops slightly allowing the spring to extend moving the stem down and the disk away from the orifice This allows flow through the body to the downstream system Types 95H 95L 95HP and 95HT use spring force to regulate outlet pressure Installation Clean out all pipelines before installation of the regulator and check to be sure the regulator has not been damaged or collected foreign material during shipping Apply pipe compound to the external pipe threads and install the regulator in any position desired but be sure flow through the body is in the direction indicated by the arrow cast on the body Note It is important that the regulator be installed so that the vent hole in the spring case is unobstructed at all times For outdoor installations the regulator should be located away from vehicular traffic and positioned so that water ice and other foreign materials cannot enter the spring case through the vent Avoid placing the regulator beneath eaves or downspouts and be sure it is above the probable sno
29. ual and any applicable standard or code limitation should not be exceeded 2 Pressures and or the body end connection may decrease these maximum temperatures 3 Fluorocarbon FKM is limited to 200 F 93 C hot water Types 95L 95H 95HP and 95HT Table 1 Outlet Pressure Ranges OUTLET PRESSURE RANGE SPRING WIRE DIAMETER SPRING FREE LENGTH SPRING BODY SIZE TNE NPS DN si bar In mm In mm PART COLOR psig i i NUMBER 2106 0 14 to 0 41 0 148 3 76 2 00 50 8 1E392527022 Yellow 1 4 5to 15 0 34 to 1 0 0 172 4 37 2 00 50 8 1E392627012 Green 13 to 30 0 90 to 2 1 0 207 5 26 1 93 49 2 1E392727142 Red 2106 0 14 to 0 41 0 207 5 26 2 50 63 5 1E395627022 Yellow 95L 1 2 15 5to 15 0 34 to 1 0 0 234 5 94 2 57 65 2 1D7455T0012 Green 13 to 30 0 90 to 2 1 0 281 7 14 2 44 62 0 1E395727192 Red 3 4 1 2106 0 14 to 0 41 0 306 7 77 4 00 102 1E398927022 Yellow 20 25 5 to 15 0 34 to 1 0 0 343 8 71 4 00 102 1E399027142 Green j 13 to 30 0 90 to 2 1 0 406 10 3 4 00 102 1E399127162 Red 15 to 30 1 0 to 2 1 0 148 3 76 2 00 50 8 1E392527022 Yellow 1 4 25 to 75 1 7 to 5 2 0 172 4 37 2 00 50 8 1E392627012 Green 70 to 150 4 8 to 10 3 0 207 5 26 1 93 49 2 1E392727142 Red 15 to 30 1 0 to 2 1 0 207 5 26 2 50 63 5 1E395627022 Yellow 1 2 15 25 to 75 1 7 to 5 2 0 234 5 94 2 57 65 2 1D7455T0012 Green 70 to 150 4 8 to 10 3 0 281 7 14 2 44 62 0 1E395727192 Red 95H 3
30. w level On NPS 1 1 2 or 2 DN 40 or 50 95H Series regulators the spring case vent is tapped so a vent line can be connected to provide venting to a remote location On NPS 1 4 1 2 3 4 and 1 DN 15 20 and 25 95H Series body sizes the tapped vent option is available on request The exposed end of the vent pipe should be protected with a weather and insect resistant vent assembly All vents and remote vent lines should be checked periodically to ensure that they are unobstructed Overpressure Protection The Types 95L 95H 95HP and 95HT regulators have an outlet pressure rating lower than the inlet pressure rating The recommended pressure limitations are stamped on the regulator nameplate Some type of overpressure protection is needed if the actual inlet pressure exceeds the maximum operating outlet pressure rating Overpressure protection should also be provided if the regulator inlet pressure is greater than the safe working pressure of downstream equipment 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 regulation Regulator operation below the maximum pressure limitations does not preclude the possibility of damage from external sources or from debris in the pipeline If the regulator is exposed to an overpres
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