Fisher MR95L Instruction Manual
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Fisher MR95L Instruction Manual

Mr95 series pressure regulators
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Instruction Manual
October 2014
MR95 Series Pressure Regulators
P1757
TYPE MR95L
P1753
TYPE MR95H
Figure 1. Typical MR95 Series Pressure Regulators
www.fisherregulators.com

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  • Page 1 MR95 Series Instruction Manual October 2014 MR95 Series Pressure Regulators P1757 TYPE MR95L P1753 TYPE MR95H PRESSURE REDUCING REGULATORS Figure 1. Typical MR95 Series Pressure Regulators www.fisherregulators.com...
  • Page 2 Available Constructions Maximum Temperature Ranges of Diaphragm and Type MR95L: Low pressure regulator for 2 to Seat Materials (1)(2) 30 psig / 0.14 to 2.1 bar outlet pressures...
  • Page 3 MR95 Series regulators are suitable for steam, air, Type MR95HD—Basically the same as Type MR95LD, gas, water, oil and similar fluids. Types MR95L, but permits higher differential pressure ranges from MR95H, MR95HP and MR95HT are direct-operated 5 to 150 psi / 0.34 to 10.3 bar with seven different pressure reducing regulators for pressure control spring ranges.
  • Page 4 GASKET GASKET TYPE MR95H WITH 2 METAL DIAPHRAGMS (ALSO TYPICAL OF TYPE MR95L (1/4 NPT, 2 to 6 psi / 0.14 to 0.41 bar RANGE) TYPES MR95HT AND MR95L EXCEPT FOR TYPE MR95L WITH 1/4 NPT WITH METAL DIAPHRAGM BODY SIZE, 2 to 6 psi / 0.14 to 0.41 bar RANGE) Figure 2.
  • Page 5 MR95 Series HANDWHEEL Type 95HD October 2006 Type 95HD Differential Pressure Reducing Regulator PRESSURE A* (SPRING CASE LOADING CONTROL SPRING PRESSURE) DIAPHRAGM PRESSURE A* SPRING SETTING = PITOT TUBE PRESSURE B STEM PRESSURE B (OUTLET PRESSURE) ORIFICE CONTROL LINE TAP VALVE PLUG FRONT AND INTERNAL VIEW OF BACK VIEW OF...
  • Page 6 MR95 Series Table 1. Types MR95L and MR95LD Regulators Body Constructions BODY MATERIALS BODY SIZE BODY CONSTRUCTION END CONNECTION 1/4 NPT Without Control Line and Gauge Port Without Control Line and Gauge Port Welded CL150 RF Welded CL300 RF 1/2 in. / DN 15...
  • Page 7 MR95 Series Table 2. Types MR95H, MR95HD, MR95HT and MR95HP Regulators Body Constructions BODY MATERIALS BODY SIZE BODY CONSTRUCTION END CONNECTION 1/4 NPT Without Gauge Port and Control Line Welded CL150 RF Welded CL300 RF Welded CL600 RF Without Control Line and Gauge Port Welded PN 16/25/40 RF Integral CL150 RF Integral CL300 RF...
  • Page 8 MR95 Series Table 2. Types MR95H, MR95HD, MR95HT and MR95HP Regulators Body Constructions (continued) BODY MATERIALS BODY SIZE BODY CONSTRUCTION END CONNECTION Welded CL150 RF With Control Line but Without Gauge Port Welded CL300 RF Welded PN 16/25/40 RF 1 in. / DN 25 Welded CL150 RF With Gauge Port but Without Control Line Welded CL300 RF...
  • Page 9 Powder-coated steel ERCA04288A0 Yellow 5 to 15 0.34 to 1.0 0.234 5.94 2.60 65.9 Powder-coated steel ERAA01910A0 Green MR95L 13 to 30 0.90 to 2.1 0.283 7.19 2.44 62.0 Powder-coated steel ERAA01911A0 2 to 6 0.14 to 0.41 0.306 7.77 4.00...
  • Page 10 PRESSURE PRESSURE TYPE BODY SIZE BODY MATERIALS psig psig psig Gray cast iron 17.2 WCC Steel 20.7 LCC Steel 20.7 MR95L and All available CF8M Stainless Steel 20.7 MR95LD sizes CF3M Stainless Steel 20.7 Monel 20.7 ®(4) Hastelloy 20.7 ®...
  • Page 11 MR95 Series PLANT AIR ATMOSPHERE BLOCK VALVE TYPE 67CFR REGULATOR (OUTLET) VENT (INLET) VENT TYPE MR95LD REGULATOR (ALSO TYPICAL OF TYPE MR95HD) Figure 3. Differential Pressure Regulator Installation Schematics Installation Before installing the regulator: • Unpack the regulator and remove the protective shipping plugs from the end connections of WARNING the body and the pressure connection in the...
  • Page 12 The Types MR95H and MR95HD regulators have an Adjustment outlet pressure rating equal to the inlet pressure rating. The Types MR95L, MR95LD, MR95HP and MR95HT WARNING regulators have an outlet pressure rating lower than the inlet pressure rating.
  • Page 13 Type MR95L, MR95H, MR95HP or MR95HT rules and regulations. regulator opens in response to the decreased outlet pressure. For Types MR95L, MR95H, MR95HP Due to normal wear that may occur, inspect the and MR95HT regulators, skip steps 4, 5 and 6.
  • Page 14 On 1-1/2 or 2. For Types MR95L, MR95H, MR95HP and 2 in. / DN 40 or 50 body size regulators, the stem MR95HT—loosen the jam nut (key 17) and turn (key 6) will also come out of the regulator body.
  • Page 15 GASKET (KEY 19) GASKET (KEY 19) TYPES MR95L AND MR95H METAL DIAPHRAGM TYPES MR95LD AND MR95HD METAL DIAPHRAGM Figure 4. Diaphragm Assembly for MR95 Series with 1/4 NPT and 1/2 to 1 in. / DN 15 to 25 Body Sizes...
  • Page 16 2. Take out the machine screw (key 41) and lift off for Types MR95L and MR95LD, 1/4 NPT with the washer (key 44) and handwheel (key 38). 2 to 6 psi / 0.14 to 0.41 bar spring range setting 3.
  • Page 17 See Following Tables Spring Case See Following Tables parts list. Separate kits containing all recommended Orifice spare parts are available. Metal-to-metal seat Types MR95L, MR95LD, MR95H and MR95HD 1/4 NPT Body Size Note 416 Stainless Steel GF04856X022 316 Stainless Steel GF04856X032...
  • Page 18 Part Number Description Part Number Orifice (continued) Stem/Stem Assembly (continued) Composition seat (continued) Types MR95L, MR95LD, MR95H and MR95HD (continued) Type MR95HP 1/2 in. / DN 15 Body Size (continued) 1/4 NPT Body Size 316 Stainless Steel 316 Stainless Steel, NACE...
  • Page 19 Upper Spring Seat, NACE (continued) Type MR95HP (continued) Types MR95L, MR95LD, MR95H and MR95HD (continued) 1-1/2 and 2 in. / DN 40 and 50 Body Sizes 1-1/2 and 2 in. / DN 40 and 50 Body Sizes 416 Stainless Steel, Oxygen Service...
  • Page 20 Cap Screw, NACE (continued) Diaphragm Gasket (continued) (1)(2) Types MR95L and MR95LD (continued) (2 required for pressure loaded spring case) (continued) 3/4 and 1 in. / DN 20 and 25 Body Sizes For 302 Stainless Steel Steam Service, Monel ®...
  • Page 21 1/4 NPT Body Size ERAA01632A0 3/4 to 1 in. / DN 20 to 25 Body Sizes, 1/2 to 2 in. / DN 15 to 50 Body Sizes 1K8849X0012 Types MR95L and MR95LD: Stuffing Box Nut 2 gauges - 2 required ERAA01930A0 Handwheel Adjustment...
  • Page 22 MR95 Series Key 1, Types MR95L and MR95LD Regulator Body Part Numbers BODY MATERIAL BODY SIZE CF8M CF3M CONNECTION Gray Cast Iron WCC Steel LCC Steel Monel Hastelloy ®(1) ® Stainless Steel Stainless Steel 1/4 in. ERCA01629A0 GF04880X022 GF04880X062 GF04880X052...
  • Page 23 MR95 Series Key 1, Types MR95H, MR95HD, MR95HP and MR95HT Regulator Body Part Numbers BODY MATERIAL CF8M CF3M BODY SIZE Aluminum- CONNECTION Gray Cast Iron WCC Steel LCC Steel Stainless Stainless Monel Hastelloy ®(1) ® Bronze Steel Steel 1/4 in. ERCA01628A0 GF04858X022 GF04858X062...
  • Page 24 MR95 Series Key 1, Types MR95H, MR95HD, MR95HP and MR95HT Regulator Body Part Numbers BODY MATERIAL CF8M CF3M BODY SIZE Aluminum- CONNECTION Gray Cast Iron WCC Steel LCC Steel Stainless Stainless Monel Hastelloy ®(1) ® Bronze Steel Steel ERCA01563A0 GF05235X022 GF05235X082 GF05235X052 GF05235X042...
  • Page 25 2. Apply L2 (anti-seize compound) on key 16 for stainless steel bolts. 3. Apply L4 (graphite sealant) instead of L1 (general purpose PTFE or lithium grease) on key 63 for graphite ring. Figure 6. Type MR95L, 1/4 NPT and 1/2 to 1 in. / DN 15 to 25 Body Sizes Assembly...
  • Page 26 MR95 Series CONTROL LINE OPTION COMPOSITE SEAT OPTION METAL DIAPHRAGM OPTION GF04919 APPLY LUBRICANT OR SEALANT T = THREAD LOCKER L1 = GENERAL PURPOSE PTFE OR LITHIUM GREASE L2 = ANTI-SEIZE COMPOUND L3 = SILICONE GREASE L4 = GRAPHITE SEALANT 1.
  • Page 27 MR95 Series TEE-HANDLE OPTION SEALED ADJUSTING SCREW OPTION HP OPTION COMPOSITE SEAT OPTION METAL DIAPHRAGM OPTION CONTROL LINE OPTION GF04914 APPLY LUBRICANT OR SEALANT L1 = GENERAL PURPOSE PTFE OR LITHIUM GREASE L2 = ANTI-SEIZE COMPOUND L4 = GRAPHITE SEALANT 1.
  • Page 28 MR95 Series 22 L2 TEE-HANDLE SEALED ADJUSTING OPTION SCREW OPTION METAL DIAPHRAGM OPTION 27B L1 HP OPTION COMPOSITION SEAT OPTION CONTROL LINE OPTION GF04500 APPLY LUBRICANT OR SEALANT L1 = GENERAL PURPOSE PTFE OR LITHIUM GREASE L2 = ANTI-SEIZE COMPOUND L4 = GRAPHITE SEALANT 1.
  • Page 29 MR95 Series METAL DIAPHRAGM OPTION CONTROL LINE OPTION COMPOSITION SEAT OPTION GF04918 APPLY LUBRICANT OR SEALANT L1 = GENERAL PURPOSE PTFE OR LITHIUM GREASE L2 = ANTI-SEIZE COMPOUND L4 = GRAPHITE SEALANT 1. Lubricants and sealants must be selected such that they meet the temperature requirements. 2.
  • Page 30 - - - - - - - - - - - Drilled Hole (standard) ERCA03564A0 ERCA02883A0 ERCA02883A3 ERCA02883A2 - - - - - - - - - - - - - - - - - - - - - - MR95L 1/4 NPT Vent ERCA00615A0 ERAA01885A0 ERAA01885A4 ERAA01885A1 ERAA01885A2 ERAA01885A3...
  • Page 31 2. NACE MR0175-2002. 3. Oxygen Service 4. Not available for Types MR95L and MR95LD. NOTE: Optional material options are available to meet ANSI/NACE MR0175/ISO 15156, please contact your local Sales Office for special ordering instructions. Key 12* Composition Diaphragm, NACE MR0175-2002 and NACE MR0103...
  • Page 32 - - - - - - - - - - - ERCA00527A2 ERCA00527A3 1. Only one metal diaphragm is needed for Types MR95L and MR95LD with 1/4 NPT body size and 2 to 6 psi / 0.14 to 0.41 bar spring range. See Table 7. *Recommended spare part. Monel is a mark owned by Special Metals Corporation.

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