Emerson Fisher MR95 Series User manual

MR95 Series
D103587X012
Instruction Manual
November 2013
www.fisherregulators.com
MR95 Series Pressure Regulators
TYPE MR95L
TYPE MR95H
Figure 1. Typical MR95 Series Pressure Regulators
TYPE MR95L
TYPE MR95L
TYPE MR95L
TYPE MR95L
TYPE MR95H
PRESSURE REDUCING REGULATORS
P1757
P1753

MR95 Series
2
Specications
This section lists the specications for the MR95 Series regulators. Factory specication such as type, maximum
inlet pressure, maximum temperature, maximum outlet pressure, spring range, orice size, and seat material are
stamped on the nameplate fastened on the regulator at the factory.
Available Constructions
Type MR95L: Low pressure regulator for 2 to
30 psig / 0.14 to 2.1 bar outlet pressures
Type MR95H: High pressure regulator for 5 to
150 psig / 0.34 to 10.3 bar outlet pressures
Type MR95HP: High pressure regulator for
15 to 400 psig / 1.0 to 27.6 bar outlet pressures
(soft-seated)
Type MR95HT: 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
Type MR95LD: Low pressure differential
regulator for 2 to 30 psi / 0.14 to 2.1 bar
differential pressures
Type MR95HD: High pressure differential
regulator for 5 to 150 psi / 0.34 to 10.3 bar
differential pressures
Body and Orice Sizes
1/4 NPT body: 0.284-inch / 7.22 mm orice
1/2-inch / DN 15 body: 0.416-inch / 10.56 mm orice
3/4 and 1-inch / DN 20 and 25 Body Sizes:
0.631-inch / 16.02 mm orice
1-1/2 and 2-inch / DN 40 and 50 Body Sizes
(not available for Types MR95L and MR95LD):
1.142-inch / 29 mm orice
End Connection Styles
NPT, SWE, and Welded and Integral CL150 RF,
CL300 RF, CL600 RF, and PN 16/25/40 RF;
all sizes are fabricated with slip-on anges
(for welded end connections) and are 14-inch
face- to- face (EN anged-356 mm face-to-face)
See Tables 1 and 2
Maximum Cold Working Pressures of Body Size
and Materials(1)
See Table 4
Outlet and Differential Pressure Ranges(1)
See Table 3
Pressure Registration
Internal or External
Shutoff Classication Per ANSI/FCI 70-3-2004
Metal Seats: Class IV
Elastomer Seats: Class VI or better
PTFE: Class IV
1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
2. Pressure and/or the body end connection may decrease these maximum temperatures.
3. Fluorocarbon (FKM) is limited to 200°F / 93°C hot water.
Monel® is a mark owned by Special Metals Corporation.
Hastelloy® C is a mark owned by Haynes International, Inc.
Maximum Temperature Ranges of Diaphragm and
Seat Materials(1)(2)
MATERIAL TEMPERATURE RANGE
Nitrile (NBR)
Neoprene (CR)
Fluorocarbon (FKM)(3)
Ethylenepropylene (EPDM)
Peruoroelastomer (FFKM)
Polytetrauoroethylene (PTFE)
Stainless Steel (SST)
-40 to 180°F / -40 to 82°C
-40 to 180°F / -40 to 82°C
0 to 300°F / -18 to 149°C
20 to 275°F / -7 to 135°C
0 to 425°F / -18 to 218°C
-40 to 400°F / -40 to 204°C
-40 to 650°F / -40 to 343°C
Maximum Temperature Ranges of Body Materials(1)(2)
BODY AND SPRING CASE MATERIALS TEMPERATURE RANGE
Gray Cast Iron
WCC Steel
LCC Steel
Stainless steel
Monel®
Hastelloy® C
Aluminum-Bronze
-20 to 406°F / -29 to 208°C
-20 to 650°F / -29 to 343°C
-40 to 650°F / -40 to 343°C
-40 to 550°F / -40 to 288°C
-40 to 550°F / -40 to 288°C
-40 to 550°F / -40 to 288°C
-40 to 500°F / -40 to 260°C
Flow and Sizing Coefcients
See Table 5
Pressure Setting Adjustment
Adjusting screw:
Standard for Types MR95L, MR95H, MR95HP,
and MR95HT only
Handwheel:
Standard for Types MR95LD and MR95HD
Optional for 1/2-inch / DN 15 body size of
Types MR95L, MR95H, MR95HP, and MR95HT
Tee handle:
Optional for other body sizes (except 1/2-inch /
DN 15) of Types MR95L, MR95H, MR95HP,
and MR95HT
Approximate Weights
MR95H Series:
1/4 NPT body: 5 pounds / 2.3 kg
1/2-inch / DN 15 body: 10 pounds / 4.5 kg
3/4 and 1-inch / DN 20 and 25 Body Sizes:
22 pounds / 10 kg
1-1/2 and 2-inch / DN 40 and 50 Body Sizes:
55 pounds / 25 kg
MR95L Series:
1/4 NPT body: 7 pounds / 3.2 kg
1/2-inch / DN 15 body: 15 pounds / 6.8 kg
3/4 and 1-inch / DN 20 and 25 Body Sizes:
35 pounds / 16 kg

MR95 Series
3
WARNING
!
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,
re 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. (Regulator
Technologies) 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.
Installation, operation, and maintenance
procedures performed by unqualied
personnel may result in improper
adjustment and unsafe operation. Either
condition may result in equipment
damage or personal injury. Only a
qualied person shall install or service
the MR95 Series regulator.
Introduction
Scope of the Manual
This manual provides instructions for the installation,
adjustment, maintenance, and parts ordering for
MR95 Series pressure regulators. These regulators
are usually shipped separately for line or panel
mounting or installed on other equipment. Instructions
and parts lists for other equipment are found in
separate manuals.
Product Description
MR95 Series regulators are suitable for steam, air,
gas, water, oil, and similar uids. Types MR95L,
MR95H, MR95HP, and MR95HT are direct-operated
pressure reducing regulators for pressure control
requiring constant outlet pressures between 2 and
400 psig / 0.14 and 27.6 bar. Types MR95LD and
MR95HD are small-size, large-capacity, differential
pressure regulators. The differential pressure
range is from 2 to 150 psi / 0.14 to 10.3 bar. Typical
MR95 Series regulators are shown in Figure 1.
Pressure Reducing Regulators
Type MR95L—Pressure reducing regulator suitable
for controlling many gases and liquids. Gray Cast
Iron, Steel, Stainless steel, Hastelloy® C, and Monel®
bodies are available. Outlet pressure range is from
2 to 30 psig / 0.14 and 2.1 bar with three different
springs available. Body sizes are available from
1/4 NPT through 1-inch / DN 25 with a variety of end
connections. The standard orice sizes are 0.284,
0.416, and 0.631-inch / 7.22, 10.56, and 16.02 mm
diameter, dependent on body sizes.
Type MR95H—Basically the same as Type MR95L,
but permits higher outlet pressure ranges from 15
to 150 psig / 1.0 to 10.3 bar for the 1/4 NPT and
1/2, 3/4, and 1-inch / DN 15, 20, and 25 sizes. Also
available in 1-1/2 and 2-inch / DN 40 and 50 sizes with
a 1.142-inch / 29 mm orice to give outlet pressure
ranges from 5 to 150 psig / 0.34 to 10.3 bar.
Type MR95HP—Basically the same as Type MR95H,
but permits even higher outlet pressure ranges from
15 to 400 psig / 1.0 to 27.6 bar.
Type MR95HT—Basically the same as Type MR95H,
but permits higher outlet pressures at higher
temperatures. Outlet pressure ranges are available
from 15 to 300 psig / 1.0 to 20.7 bar and temperatures
up to 650°F / 343°C.
Differential Pressure Regulators
Type MR95LD—Small-size, large-capacity, differential
pressure regulators. Typical applications include
use on testing xtures, wash tanks, sterilizers, steam
tables, fuel lines, and plant air supplies. Gray Cast
Iron, Steel, Stainless steel, Hastelloy® C, and Monel®
bodies are available. Differential pressure range is
from 2 to 30 psi / 0.14 to 2.1 bar with three different
spring ranges.
Type MR95HD—Basically the same as Type MR95LD,
but permits higher differential pressure ranges from
5 to 150 psi / 0.34 to 10.3 bar with seven different
spring ranges.
Monel® is a mark owned by Special Metals Corporation.
Hastelloy® C is a mark owned by Haynes International, Inc.

MR95 Series
4
Figure 2. MR95 Series Operational Schematics
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
SPRING
GASKET
METAL DIAPHRAGMS
TYPE MR95H WITH 2 METAL DIAPHRAGMS (ALSO TYPICAL OF
TYPES MR95HT AND MR95L EXCEPT FOR TYPE MR95L WITH 1/4 NPT
BODY SIZE, 2 to 6 psi / 0.14 to 0.41 bar RANGE)
SPRING
GASKET
METAL DIAPHRAGM
TYPE MR95L (1/4 NPT, 2 to 6 psi / 0.14 to 0.41 bar RANGE)
WITH METAL DIAPHRAGM
DIAPHRAGM
CONTROL SPRING
CONTROL LINE TAP
ADJUSTING SCREW
PITOT TUBE
STEM
ORIFICE
VALVE PLUG
FRONT AND INTERNAL VIEW OF
TYPE MR95H WITH INTERNAL
PRESSURE REGISTRATION
BACK VIEW OF
1/2 INCH / DN 15 TYPE MR95H
WITH EXTERNAL
PRESSURE REGISTRATION
SIDE AND INTERNAL VIEW OF
3/4 TO 2-INCH / DN 20 TO 50
TYPE MR95H WITH EXTERNAL
PRESSURE REGISTRATION
(ALSO TYPICAL OF TYPE MR95L,
1/2 TO 2-INCH / DN 15 TO 50 BODY SIZES)
Principle of Operation
For Types MR95H, MR95L,
MR95HP, and MR95HT
Pressure Reducing Regulators
Types MR95L, MR95H, MR95HP, and MR95HT (see
Figure 2) are direct-operated regulators and use
spring force to regulate outlet pressure. Downstream
pressure is registered either internally through the
body or externally through a control line to the under
side of the diaphragm. When the downstream
pressure is at or above the set pressure, the disk is
held against the orice, and restricting ow 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
orice. This allows uid ow through the body to the
downstream system.

MR95 Series
5
Figure 2. MR95 Series Operational Schematics (continued)
CONTROL LINE TAP
*PRESSURE A MAY BE SUPPLIED BY ANOTHER PRESSURE SYSTEM OR A MANUAL LOADING REGULATOR.
DIAPHRAGM
STEM
ORIFICE
VALVE PLUG
FRONT AND INTERNAL VIEW OF
TYPE MR95HD WITH INTERNAL PRESSURE REGISTRATION
BACK VIEW OF
TYPE MR95HD WITH EXTERNAL PRESSURE REGISTRATION
Type 95HD Differential Pressure Reducing Regulator
M1006
OUTLET PRESSURE
LOADING PRESSURE
October 2006 Type 95HD
INLET PRESSURE
LOADING PRESSURE
INLET PRESSURE
OUTLET PRESSURE
CONTROL SPRING
HANDWHEEL
PITOT TUBE
PRESSURE A*
(SPRING CASE
LOADING
PRESSURE)
PRESSURE A +
SPRING SETTING =
PRESSURE B
PRESSURE B
(OUTLET
PRESSURE)
For Types MR95LD and MR95HD
Differential Pressure Regulators
Types MR95LD and MR95HD regulators maintain
a differential pressure between the loading supply
pressure and the downstream pressure of the regulator.
See Figure 2. The design of the regulator isolates the
diaphragm and pressure response chamber from the
main ow stream. The downstream pressure (outlet
pressure) is registered under the diaphragm through
the pitot tube or registration hole. If the downstream
pressure increases, pressure under the diaphragm
also increases. This force overcomes the spring
compression and loading supply pressure, allowing the
stem to rise. The valve plug spring forces the valve
plug closer to the orice. Flow through the regulator
is reduced so that downstream pressure returns to
the desired differential level. When the downstream
pressure decreases, the opposite action takes place.
Pressure under the diaphragm decreases. The valve
stem pushes the valve plug downward, opening the
ow stream and increasing the uid ow through the
regulator. Downstream pressure rises back to the
desired differential level.

MR95 Series
6
BODY SIZE BODY CONSTRUCTION END CONNECTION
BODY MATERIALS
Gray Cast Iron
LCC or WCC Steel
CF3M Stainless Steel CF8M Stainless Steel
Monel®or Hastelloy®C
1/4 NPT Without Control Line and Gauge Port NPT
1/2-inch / DN 15
Without Control Line and Gauge Port
NPT
SWE
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
With Control Line but Without Gauge Port
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
3/4-inch / DN 20
Without Control Line and Gauge Port
NPT
SWE
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
With Control Line but Without Gauge Port
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
With Gauge Port but Without Control Line
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
1-inch / DN 25
Without Control Line and Gauge Port
NPT
SWE
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
With Control Line but Without Gauge Port
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
With Gauge Port but Without Control Line
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
- Shaded areas indicate that the construction is available.
- Blank areas indicate that you need to contact your local Sales Ofce for the availability of the constructions.
Monel® is a mark owned by Special Metals Corporation.
Hastelloy® C is a mark owned by Haynes International, Inc.
Table 1. Types MR95L and MR95LD Regulators Body Constructions

MR95 Series
7
BODY SIZE BODY
CONSTRUCTION END CONNECTION
BODY MATERIALS
Gray Cast Iron(1)
LCC or WCC Steel
CF8M Stainless Steel CF3M Stainless Steel
Monel®or Hastelloy®C
Aluminum-Bronze
1/4 NPT Without Gauge Port and Control Line NPT
1/2-inch / DN 15
Without Control Line and Gauge Port
NPT
SWE
Welded CL150 RF
Welded CL300 RF
Welded CL600 RF
Welded PN 16/25/40 RF
Integral CL150 RF
Integral CL300 RF
Integral CL600 RF
Integral PN 16/25/40 RF
With Control Line but Without Gauge Port
NPT
Welded CL150 RF
Welded CL300 RF
Welded CL600 RF
Welded PN 16/25/60 RF
3/4-inch / DN 20
Without Gauge Port and Control Line
NPT
SWE
Welded CL150 RF
Welded CL300 RF
Welded CL600 RF
Welded PN 16/25/40 RF
With Control Line but Without Gauge Port
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/60 RF
With Gauge Port but Without Control Line
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/60 RF
1-inch / DN 25 Without Gauge Port and Control Line
NPT
SWE
Welded CL150 RF
Welded CL300 RF
Welded CL600 RF
Welded PN 16/25/40 RF
Integral CL150 RF
Integral CL300 RF
Integral CL600 RF
Integral PN 16/25/40 RF
- Shaded areas indicate that the construction is available.
- Blank areas indicate that you need to contact your local Sales Ofce for the availability of the constructions.
1. Gray cast iron body material is available for Types MR95H and MR95HD only.
Monel® is a mark owned by Special Metals Corporation.
Hastelloy® C is a mark owned by Haynes International, Inc.
Table 2. Types MR95H, MR95HD, MR95HT, and MR95HP Regulators Body Constructions
- continued -

MR95 Series
8
BODY SIZE BODY
CONSTRUCTION END CONNECTION
BODY MATERIALS
Gray Cast Iron(1)
LCC or WCC Steel
CF8M Stainless Steel CF3M Stainless Steel
Monel®or Hastelloy®C
Aluminum-Bronze
1-inch / DN 25
With Control Line but Without Gauge Port
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
With Gauge Port but Without Control Line
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
1-1/2-inch / DN 40
Without Gauge Port and Control Line
NPT
SWE
Welded CL150 RF
Welded CL300 RF
Welded CL600 RF
Welded PN 16/25/40 RF
With Control line but Without Gauge Port
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
With Gauge Port but Without Control Line
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
2-inch / DN 50
Without Gauge Port and Control Line
NPT
SWE
Welded CL150 RF
Welded CL300 RF
Welded CL600 RF
Welded PN 16/25/40 RF
Integral CL150 RF
Integral CL300 RF
Integral CL600 RF
Integral PN 16/25/40 RF
With Control Line but Without Gauge Port
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
With Gauge Port but Without Control Line
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
- Shaded areas indicate that the construction is available.
- Blank areas indicate that you need to contact your local Sales Ofce for the availability of the constructions.
1. Gray cast iron body material is available for Types MR95H and MR95HD only.
Monel® is a mark owned by Special Metals Corporation.
Hastelloy® C is a mark owned by Haynes International, Inc.
Table 2. Types MR95H, MR95HD, MR95HT, and MR95HP Regulators Body Constructions (continued)

MR95 Series
9
Table 3. MR95 Series Outlet and Differential Pressure Ranges and Spring Information
TYPE
BODY SIZE OUTLET OR DIFFERENTIAL
PRESSURE RANGE(1)
SPRING WIRE
DIAMETER
SPRING FREE
LENGTH SPRING
MATERIAL(2)
SPRING PART
NUMBER
SPRING
COLOR
Inch DN psi/psig bar Inch mm Inch mm
MR95L
and
MR95LD
1/4 - - - -
2 to 6 0.14 to 0.41 0.148 3.76 2.00 50.8 Zinc-plated steel 1E392527022 Yellow
5 to 15 0.34 to 1.0 0.170 4.32 2.00 50.8 Zinc-plated steel ERAA01888A0 Green
13 to 30 0.90 to 2.1 0.207 5.26 1.94 49.2 Powder-coated steel ERAA01889A0 Red
1/2 15
2 to 6 0.14 to 0.41 0.207 5.26 2.50 63.5 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
13 to 30 0.90 to 2.1 0.283 7.19 2.44 62.0 Powder-coated steel ERAA01911A0 Red
3/4 and
1
20
and
25
2 to 6 0.14 to 0.41 0.306 7.77 4.00 102 Powder-coated steel 1E398927022 Yellow
5 to 15 0.34 to 1.0 0.343 8.71 4.00 102 Powder-coated steel 1E399027142 Green
13 to 30 0.90 to 2.1 0.406 10.31 4.00 102 Powder-coated steel 1E399127162 Red
3/4 and
1
20
and
25
2 to 6 0.14 to 0.41 0.306 7.77 4.00 102 Powder-coated Stainless steel 1E3989X0052 Yellow
5 to 15 0.34 to 1.0 0.375 9.53 3.88 98.6 Stainless steel 1K762537022 Unpainted
13 to 30 0.90 to 2.1 0.437 11.1 4.00 102 Stainless steel 11A8269X012 Unpainted
MR95H
and
MR95HD
1/4 - - - -
15 to 30 1.0 to 2.1 0.148 3.76 2.00 50.8 Zinc-plated steel 1E392527022 Yellow
25 to 75 1.7 to 5.2 0.170 4.32 2.00 50.8 Zinc-plated steel ERAA01888A0 Green
70 to 150 4.8 to 10.3 0.207 5.26 1.94 49.2 Powder-coated steel ERAA01889A0 Red
1/2 15
15 to 30 1.0 to 2.1 0.207 5.26 2.50 63.5 Powder-coated steel ERCA04288A0 Yellow
25 to 75 1.7 to 5.2 0.234 5.94 2.60 65.9 Powder-coated steel ERAA01910A0 Green
70 to 150 4.8 to 10.3 0.283 7.19 2.44 62.0 Powder-coated steel ERAA01911A0 Red
3/4 and
1
20
and
25
15 to 30 1.0 to 2.1 0.306 7.77 4.00 102 Powder-coated steel 1E398927022 Yellow
25 to 75 1.7 to 5.2 0.343 8.71 4.00 102 Powder-coated steel 1E399027142 Green
70 to 150 4.8 to 10.3 0.406 10.31 4.00 102 Powder-coated steel 1E399127162 Red
3/4 and
1
20
and
25
15 to 30 1.0 to 2.1 0.306 7.77 4.00 102 Powder-coated Stainless steel 1E3989X0052 Yellow
25 to 75 1.7 to 5.2 0.375 9.53 3.88 98.6 Stainless steel 1K762537022 Unpainted
70 to 150 4.8 to 10.3 0.437 11.1 4.00 102 Stainless steel 11A8269X012 Unpainted
1-1/2
and
2
40
and
50
5 to 80 0.34 to 5.5 0.500 12.7 6.50 165 Powder-coated steel ERCA04290A0 Black with Light
Blue Stripe
60 to 120 4.1 to 8.3 0.562 14.3 6.56 167 Powder-coated steel ERAA01893A0 Light Gray
100 to 140 6.9 to 9.7 0.594 15.1 6.56 167 Enamel-coated steel ERAA01894A0 Yellow
120 to 150 8.3 to 10.3 0.625 15.9 6.57 167 Powder-coated steel 1P788827082 Black
MR95HT
1/4 - - - -
15 to 100 1.0 to 6.9 0.192 4.88 2.00 50.8 Inconel®ERCA04292A0 Unpainted
80 to 300 5.5 to 20.7 0.281 7.14 2.00 50.8 Inconel®ERCA04291A0 Unpainted
1/2 15
15 to 100 1.0 to 6.9 0.281 7.14 2.60 66.0 Inconel®ERCA04294A0 Unpainted
80 to 300 5.5 to 20.7 0.375 9.53 2.60 66.0 Inconel®ERCA04293A0 Unpainted
3/4
and 1
20
and 25
15 to 100 1.0 to 6.9 0.437 11.1 4.08 104 17-4 PH Stainless steel ERCA04295A0 Unpainted
80 to 300 5.5 to 20.7 0.562 14.3 4.08 104 17-4 PH Stainless steel ERCA04296A0 Unpainted
1-1/2
and 2
40
and 50
15 to 100 1.0 to 6.9 0.625 15.9 6.70 170 17-4 PH Stainless steel ERCA04297A0 Unpainted
60 to 260 4.1 to 17.9 0.812 20.6 6.70 170 17-4 PH Stainless steel ERCA04298A0 Unpainted
MR95HP
1/4 - - - -
15 to 100 1.0 to 6.9 0.192 4.88 2.00 50.8 Inconel®ERCA04292A0 Unpainted
80 to 400 5.5 to 27.6 0.281 7.14 2.00 50.8 Inconel®ERCA04291A0 Unpainted
1/2 15
15 to 100 1.0 to 6.9 0.281 7.14 2.60 66.0 Inconel®ERCA04294A0 Unpainted
80 to 400 5.5 to 27.6 0.375 9.53 2.60 66.0 Inconel®ERCA04293A0 Unpainted
3/4
and 1
20
and 25
15 to 100 1.0 to 6.9 0.437 11.1 4.08 104 17-4 PH Stainless steel ERCA04295A0 Unpainted
80 to 400 5.5 to 27.6 0.562 14.3 4.08 104 17-4 PH Stainless steel ERCA04296A0 Unpainted
1-1/2
and 2
40
and 50
15 to 100 1.0 to 6.9 0.625 15.9 6.70 170 17-4 PH Stainless steel ERCA04297A0 Unpainted
60 to 300 4.1 to 20.7 0.812 20.6 6.70 170 17-4 PH Stainless steel ERCA04298A0 Unpainted
1. For Types MR95LD and MR95HD regulators, the pressure ranges indicate the differential pressure that can be obtained with the indicated spring. The differential pressure (spring
setting) is added to the spring case loading pressure to determine the actual outlet pressure.
2. Springs meet NACE MR0175-2002 and NACE MR0103 requirements only for applications in which the spring is not exposed to the sour gas.
Inconel® is a mark owned by Special Metals Corporation.

MR95 Series
10
Table 4. Maximum Cold Working Pressures of Body Size and Material(1)(2)
Table 5. Types MR95LD and MR95HD Flow and Sizing Coefficients
BODY SIZE WIDE-OPEN COEFFICIENTS
(FOR RELIEF SIZING) C1Km
IEC SIZING COEFFICIENTS
Inches DN CvCgCsXTFDFL
1/4 - - - - 1.1 37 1.85 33.6 0.74 0.715 0.62 0.86
1/2 15 2.9 103 5.15 35.5 0.79 0.797 0.70 0.89
3/4 and 1 20 and 25 6.0 221 11.05 36.8 0.88 0.857 0.68 0.94
1-1/2 and 2 40 and 50 18.1 700 35.00 38.7 0.88 0.945 0.65 0.94
Km = FL2
TYPE BODY SIZE BODY MATERIALS
MAXIMUM INLET
PRESSURE
MAXIMUM OUTLET
PRESSURE
MAXIMUM SPRING CASE
PRESSURE
psig bar psig bar psig bar
MR95L and
MR95LD
All available
sizes(3)
Gray cast iron 250 17.2 50 3.4 50 3.4
WCC Steel 300 20.7 125 8.6 125 8.6
LCC Steel 300 20.7 125 8.6 125 8.6
CF8M Stainless Steel 300 20.7 125 8.6 125 8.6
CF3M Stainless Steel 300 20.7 125 8.6 125 8.6
Monel®(4) 300 20.7 125 8.6 125 8.6
Hastelloy® C(4) 300 20.7 125 8.6 125 8.6
MR95H and
MR95HD
All available
sizes(3)
Gray cast iron 250 17.2 250 17.2 250 17.2
WCC Steel 300 20.7 300 20.7 300 20.7
LCC Steel 300 20.7 300 20.7 300 20.7
CF8M Stainless Steel 300 20.7 300 20.7 300 20.7
CF3M Stainless Steel 300 20.7 300 20.7 300 20.7
Monel®(4) 300 20.7 300 20.7 300 20.7
Hastelloy® C(4) 300 20.7 300 20.7 300 20.7
Aluminum-Bronze(4) 300 20.7 300 20.7 300 20.7
MR95HP All available
sizes(3)
WCC Steel 1000 68.9 600 41.4 300 20.7
LCC Steel 1000 68.9 600 41.4 300 20.7
CF8M Stainless Steel 1000 68.9 550 37.9 300 20.7
CF3M Stainless Steel 1000 68.9 550 37.9 300 20.7
Monel®(4) 1000 68.9 550 37.9 300 20.7
Hastelloy® C(4) 1000 68.9 550 37.9 300 20.7
Aluminum-Bronze(4) 1000 68.9 550 37.9 300 20.7
MR95HT
1/4 NPT and
1/2 to 1-inch /
DN 15 to 25
WCC Steel 600 41.4 600 41.4 300 20.7
LCC Steel 600 41.4 600 41.4 300 20.7
CF8M Stainless Steel 600 41.4 550 37.9 300 20.7
CF3M Stainless Steel 600 41.4 550 37.9 300 20.7
Monel®(4) 600 41.4 550 37.9 300 20.7
Hastelloy® C(4) 600 41.4 550 37.9 300 20.7
Aluminum-Bronze(4) 600 41.4 550 37.9 300 20.7
1-1/2 and 2-inch /
DN 40 and 50
WCC Steel 600 41.4 450 31.0 300 20.7
LCC Steel 600 41.4 450 31.0 300 20.7
CF8M Stainless Steel 600 41.4 450 31.0 300 20.7
CF3M Stainless Steel 600 41.4 450 31.0 300 20.7
Monel®600 41.4 450 31.0 300 20.7
Hastelloy® C 600 41.4 450 31.0 300 20.7
Aluminum-Bronze 600 41.4 450 31.0 300 20.7
1. The pressure/temperature limits in this Instruction Manual, and any applicable standard or code limitation should not be exceeded.
2. The pressure limits given are based on the body size and body materials only. Actual pressure limits of the assembled regulator may decrease and vary depending on the temperature,
body end connection, diaphragm, seat, and/or trim material of the regulator.
3. See Tables 1 and 2 for all available body sizes.
4. Not available for 1/4 NPT body size.
Monel® is a mark owned by Special Metals Corporation.
Hastelloy® C is a mark owned by Haynes International, Inc.

MR95 Series
11
PLANT AIR
ATMOSPHERE
TYPE 67CFR REGULATOR
TYPE MR95LD REGULATOR (ALSO TYPICAL OF TYPE MR95HD)
(OUTLET) VENT(INLET) VENT
Figure 3. Differential Pressure Regulator Installation Schematics
BLOCK
VALVE
Installation
WARNING
!
Personal injury or system damage
may result if this regulator is installed,
without appropriate overpressure
protection, where service conditions
could exceed the limits given in the
Speci cations section and/or regulator
nameplate. Refer to Overpressure
Protection section for recommendations
on how to prevent service conditions
from exceeding those limits.
Additionally, physical damage to the
regulator may result in personal injury
or property damage due to escaping of
accumulated gas. To avoid such injury
and damage, install the regulator in a
safe location.
Under enclosed conditions or indoors,
escaping gas may accumulate and be an
explosion hazard. In this case, the vent
should be piped outdoors.
For regulator constructions with a
spring case vent, the vent should be
kept open to permit free  ow of gas
to the atmosphere. Protect openings
against entrance of rain, snow, insects,
or any other foreign material that may
plug the spring case vent or vent line.
Before installing the regulator:
• Unpack the regulator and remove the protective
shipping plugs from the end connections of
the body and the pressure connection in the
spring case.
• Check the regulator and make sure it has not
been damaged or collected foreign material
during shipping.
• Remove any debris or dirt in the tubing and
the pipeline.
• Apply pipe compound to the external pipe thread
for NPT bodies or use appropriate gaskets for
 anged bodies.
• Make sure gas  ow through the regulator is in the
same direction as the arrow on the body.
On 1-1/2 or 2-inch / DN 40 or 50 Types MR95H,
MR95HP, and MR95HT regulators, the spring case vent
is tapped so a vent line can be connected to provide
venting to a remote location. On 1/4 NPT, 1/2, 3/4, and
1-inch / DN 15, 20, and 25 Types MR95H, MR95HP,
and MR95HT body sizes, the tapped vent option is
available on request. Protect the exposed end of the
vent pipe with a weather and insect resistant vent
assembly. Periodically check all vents and remote vent
lines to ensure that they are unobstructed.
On Types MR95LD and MR95HD regulators, the
loading pressure is connected to the 1/4 NPT
connection in the spring case.

MR95 Series
12
Overpressure Protection
WARNING
!
Personal injury, equipment damage, or
leakage due to escaping accumulated gas
or bursting of pressure-containing parts
may result if this regulator is:
• Overpressured
• Installed where service conditions
could exceed the limits given in the
Specications section and on the
appropriate nameplate
• Where conditions exceed any ratings of
adjacent piping or piping connections
To avoid such injury or damage, provide
pressure-relieving or pressure-limiting
devices to prevent service conditions from
exceeding those limits.
The Types MR95H and MR95HD regulators have an
outlet pressure rating equal to the inlet pressure rating.
The Types MR95L, MR95LD, MR95HP, and MR95HT
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. Provide external overpressure
protection if the regulator inlet pressure is greater than
the safe working pressure of 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 overpressure condition,
inspect it for any damage that may have occurred.
Startup
Note
The Specications section and Tables 3
and 4 show the maximum inlet, the
differential and the outlet pressures for
specic constructions. Use pressure
gauges to monitor inlet pressure, outlet
pressure, and any loading pressure
during startup.
1. Check that proper installation is completed
and downstream equipment has been
properly adjusted.
2. Make sure all block and vent valves are closed.
3. Decompress the control spring by turning the
adjusting screw (for Types MR95L, MR95H,
MR95HP, and MR95HT) or handwheel (for
Types MR95LD and MR95HD) counterclockwise.
4. Slowly open the valves in the following order:
a. Loading supply and control line valve(s), if used
b. Inlet block valve
c. Outlet block valve
5. Set the regulator to the desired outlet (control)
pressure according to the Adjustment procedure.
Adjustment
WARNING
!
To avoid personal injury, property
damage, or equipment damage caused
by bursting of pressure containing parts
or explosion of accumulated gas, never
adjust the control spring to produce an
outlet pressure higher than the upper
limit of the outlet pressure range for that
particular spring. If the desired outlet
pressure is not within the range of the
control spring, install a spring of the
proper range.
The factory setting of the regulator can be varied
within the pressure range stamped on the nameplate.
Follow the following procedures for the proper
adjustment of the outlet (control) spring. If the spring
range was changed, be sure to change the stamped
spring range on the nameplate.
All MR95 Series 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 3 and 4.

MR95 Series
13
Types MR95L, MR95H, MR95HP,
and MR95HT
Key numbers are referenced in Figure 6, 8, or 9.
1. Loosen the jam nut (key 17).
2. Turn the adjusting screw (key 15) clockwise to
increase outlet pressure, or counterclockwise to
decrease it.
3. Monitor the outlet pressure with a test gauge
during the adjustment.
4. Tighten the jam nut (key 17) to maintain the
desired setting.
Types MR95LD and MR95HD
Key numbers are referenced in Figure 7 or 10.
1. Turn handwheel (key 38) clockwise to increase
outlet pressure, or counterclockwise to decrease it.
2. Monitor the outlet pressure with a test gauge
during the adjustment.
Shutdown
1. Close the upstream block valve to the regulator inlet.
2. Close the downstream block valve to the
regulator outlet.
3. Vent the downstream pressure by slowly opening
the 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 MR95L, MR95H, MR95HP, or MR95HT
regulator opens in response to the decreased outlet
pressure. For Types MR95L, MR95H, MR95HP,
and MR95HT regulators, skip steps 4, 5, and 6.
For Types MR95LD and MR95HD continue steps 4
through 6.
4. Close the block valve to the loading pressure.
5. Vent loading pressure slowly to release pressure
in the spring case.
6. Vent inlet pressure slowly (through the bleed
valve) to release all remaining pressure in
the regulator.
Maintenance
WARNING
!
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
rst isolating the regulator from system
pressure and relieving all internal
pressure from the regulator.
To avoid possible personal injury from
spring or pressure-loaded actuator, make
certain the adjusting screw is completely
backed off and the spring case pressure
is vented prior to disassembly. Otherwise,
the spring load or loading pressure could
forcefully eject the spring case.
Regulators that have been disassembled
for repair must be tested for proper
operation before being returned to
service. Only parts manufactured by
Regulator Technologies should be used
for repairing Fisher®regulators.
Due to normal wear or damage that may
occur from external sources, this regulator
should be inspected and maintained
periodically. The frequency of inspection
and replacement of parts depends upon
the severity of service conditions or the
requirement of local, state, and federal
rules and regulations.
Due to normal wear that may occur, inspect the
parts periodically and replace if necessary. The
frequency of inspection depends on the severity of
service conditions or the requirements of state and
federal laws.
Replace parts such as the O-rings, gaskets, diaphragm,
and packing as necessary. Always apply lubricants as
the regulator is being reassembled. Suitable lubricants
are shown in the assembly drawings.
The regulator does not have to be taken out of the
pipeline to be disassembled. All key numbers are
referenced in Figures 4 to 10.

MR95 Series
14
Replacement or Maintenance of Orice
and Valve Plug
If it appears that the valve does not shut off tightly, the
orice and valve plug could be worn out or damaged.
Proceed as follows to check and/or replace them.
1. Shut down the regulator. Refer to “Shutdown”
section for the proper procedure.
2. Unscrew the valve plug guide (key 5) from the
body (key 1). The valve plug spring (key 26) and
the valve plug (key 4) will normally come out of the
body along with the valve plug guide. On 1-1/2 or
2-inch / DN 40 or 50 body size regulators, the stem
(key 6) will also come out of the regulator body.
3. 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. Also
inspect the external O-ring (key 4c) on the valve plug
of Type MR95HP. Replace the valve plug assembly
if damage is noted.
4. Inspect the seating edge of the orice (key 3).
If damage is noted, unscrew the orice from
the body (key 1) and replace it with a new part.
Reference Table 7 for proper torque values.
5. Reassemble the regulator in the reverse order of
the above steps. When installing the valve plug
guide (key 5), coat the threads and sealing surface
with sealant to ensure an adequate metal-to-metal
seal. Reference Table 7 for proper torque values.
Flange Cap Screw Torque Inspection
Retorquing of spring case cap screws may be
necessary for some MR95 Series regulators after a
period of use. Retorque the cap screws as follows:
1. Shut down the regulator. Refer to Shutdown
section for the proper procedure.
2. Retighten the cap screws (key 16) in a crisscross
pattern. See Table 7 for proper torque values.
3. Follow the Startup section to repressurize
the regulator.
4. Refer to the Replacement of Diaphragm section
as needed.
Replacement of Diaphragm
When the regulator does not respond to differential or
downstream pressure changes, if uid leaks or vents
to the spring case (pressure reducing regulators), or
the loading pressure seems to leak to the downstream
piping (differential pressure regulators), the diaphragm
could be worn out or ruptured. Inspect/replace the
diaphragm as follows:
CAUTION
Metal diaphragms have thin sharp
edges. To avoid hand cuts, be careful
when handling the diaphragm and
particularly the diaphragm edge.
1. Shut down the regulator. Refer to “Shutdown”
section for the proper procedure.
2. For Types MR95L, MR95H, MR95HP, and
MR95HT—loosen the jam nut (key 17) and turn
the adjusting screw (key 15) counterclockwise to
remove all spring compression.
For Types MR95LD and MR95HD—turn the
handwheel (key 38) counterclockwise to remove
all spring compression.
CAUTION
Provide adequate support to the spring
case when disassembling MR95 Series
regulator installed in a vertical
installation or other application where
the spring case is not oriented upward.
Without adequate support, the spring
case may fall and cause physical injury
when the cap screws are loosened.
3. Remove the cap screws (key 16) from the
diaphragm casing. Lift the entire spring case
(key 2) off of the body (key 1).
4. Remove the upper spring seat (key 9) and
regulator spring (key 11). For Types MR95H,
MR95HP, and MR95HT with body sizes 1-1/2 and
2-inch / DN 40 and 50 skip steps 5 and 6.
5. For Type MR95HD and 1/4 NPT to 1-inch /
DN 25 body sizes of Types MR95H, MR95HP,
and MR95HT—remove the lower spring seat (key 8).
For Types MR95L and MR95LD—remove the
diaphragm head assembly (key 21, lower spring
seat and diaphragm head threaded together).
6. Remove the diaphragm(s) (key 12) and examine
for damage. Replace if damage is noted. See
Table 6 for the required number of diaphragm(s).
Proceed to step 9.
7. For body sizes 1-1/2 and 2-inch / DN 40 and 50,
remove the diaphragm and diaphragm head.
The diaphragm head can only be disassembled
for the 1-1/2 and 2-inch / DN 40 and 50 sizes.

MR95 Series
15
DIAPHRAGM (KEY 12)
GASKET (KEY 19)
GASKET (KEY 19)
PUSHER POST (KEY 10)
LOCKNUT (KEY 31)
LOCK WASHER (KEY 28)
LOWER SPRING SEAT (KEY 8)
DIAPHRAGM HEAD (KEY 21)
DIAPHRAGM (KEY 12)
GASKET (KEY 45)
PUSHER POST (KEY 10)
LOCKNUT (KEY 31)
LOCK WASHER (KEY 28)
LOWER SPRING SEAT (KEY 8)
DIAPHRAGM HEAD (KEY 21)
DIAPHRAGM (KEY 12)
GASKET (KEY 29)
BODY SIZE TYPE SPRING RANGE DIAPHRAGM MATERIAL NUMBER OF DIAPHRAGMS
1/4 NPT
MR95L and
MR95LD
All ranges
Ethylyne Propylene Diene (EPDM) 1
Neoprene (CR) 1
Fluorocarbon (FKM) 1
All ranges except 2 to 6 psig / 0.14 to 0.41 bar Metal 2
2 to 6 psig / 0.14 to 0.41 bar Metal 1
MR95H,
MR95HD,
and MR95HP
All ranges
Metal 2
Ethylyne Propylene Diene (EPDM) 1
Fluorocarbon (FKM) 1
Neoprene (CR) 1
1/2 to
2 inches /
DN 15 to 50
All types All ranges
Metal 2
Ethylyne Propylene Diene (EPDM) 2
Fluorocarbon (FKM) 2
Neoprene (CR) 1
Table6.NumberofDiaphragmsRequired
Disassemble it for inspection of the diaphragm
(key 12) and two small diaphragm gaskets
(key 29) or O-ring (key 45). Remove the locknut
(key 31) from the pusher post (key 10) 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).
8. Remove the stem assembly (key 6) except
for regulator with 1/4 NPT body size. Inspect
the O-ring (not shown) from wear or damage.
Replace stem assembly if damage is noted.
9. With diaphragm(s) (key 12) removed, ensure
the pressure registration hole (pitot tube, key 20,
in 3/4-inch / DN 20 and larger body sizes) is
completely open and free of all obstructions.
Table 6. Number of Diaphragms Required
Figure 5. Diaphragm Assembly for MR95 Series with 1-1/2 and 2 inches / DN 40 and 50 Body Sizes
Figure 4. Diaphragm Assembly for MR95 Series with 1/4 NPT to 1 inch / DN 25 Body Sizes
TYPES MR95L AND MR95H METAL DIAPHRAGM
COMPOSITION DIAPHRAGM METAL DIAPHRAGM
TYPES MR95LD AND MR95HD METAL DIAPHRAGM
DIAPHRAGM HEAD (KEY 21) DIAPHRAGM HEAD (KEY 21)
GASKET (KEY 29)
DIAPHRAGM (KEY 12)
GASKET (KEY 19)

MR95 Series
16
Table 7. Torque Specifications
BODY SIZE SPRING CASE BOLTS(1) ORIFICE PLUG GUIDE
Inches DN Foot-pounds N•m Foot-pounds N•m Foot-pounds N•m
1/4
1/2
3/4 and 1
1-1/2 and 2
- - - -
15
20 and 25
40 and 50
6 to 8
10 to 13
24 to 30
40 to 50
8.1 to 11
13 to 18
33 to 41
54 to 68
6 to 8
34 to 39
45 to 50
180 to 200
8.1 to 10.8
46 to 53
61 to 68
244 to 271
50 to 58
75 to 90
100 to 125
170 to 200
68 to 79
102 to 122
136 to 169
230 to 271
1. Reduce spring case bolt’s torque by 30% when using Ethylenepropylene (EPDM) diaphragms.
10. If the unit has metal diaphragms (see Figures 4
and 5):
a. (Applicable only for the lower diaphragm head
of Types MR95H, MR95HT, and MR95HD,
1-1/2 and 2-inch / DN 40 and 50.) Find the
pusher post (key 10) and place on a surface
with the larger at surface down and the thread
stem up (metal diaphragm pusher post has
a recessed diameter in the bottom surface).
Then, nd one smaller composition gasket
(key 29) and t 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 chamfered
side of the diaphragm head toward the gasket.
Take a second gasket and place it over the
threaded end of the pusher post on top of the
diaphragm head.
b. Replace one of the two large diaphragm
gaskets (key 19) on the surface of the body
(key 1) that will support the diaphragms
(key 12). There will be two diaphragms used
per regulator, except for Types MR95L and
MR95LD, 1/4 NPT with 2 to 6 psi / 0.14 to
0.41 bar spring range setting which use only
one metal diaphragm (the metal diaphragm is
in between two diaphragm gaskets). Another
diaphragm gasket will be placed on top of the
second metal diaphragm. The raised surfaces
of the metal diaphragms should be placed
in the unit so that they are facing toward the
assembler (toward the spring) except only
when one metal diaphragm is being used
then the raised surface should be facing down
(towards the body). See Figure 2 as reference.
11. Reassemble in the reverse of the above
procedures. Lubricate the upper spring seat
(key 9) and the exposed threads of the adjusting
screw (key 15) with anti-seize lubricant. Install the
cap screws (key 16) in a crisscross pattern and
tighten to nger tight only.
12. To ensure proper slack in the diaphragm, install
the adjusting screw (key 15, for Types MR95L,
MR95H, MR95HP, and MR95HT) or handwheel
(key 38, Types MR95LD and MR95HD), if
completely removed, and turn it clockwise. This
allows proper positioning of the diaphragm
(key 12) to permit full travel of the valve plug
(key 4). Finish tightening the cap screws (key 16).
See Table 7 for proper torque values.
13. Complete reassembly procedures and turn the
adjusting screw (key 15) or handwheel (key 38)
to produce the desired outlet pressure. For
Types MR95L, MR95H, MR95HP, and MR95HT,
tighten the jam nut (key 17) to maintain the
desired setting.
Replacement of Packing
(Types MR95LD and MR95HD only)
Leakage around the adjusting screw may indicate
worn packing material. Follow the instructions below
to replace the packing rings.
1. Shut down the regulator. Refer to “Shutdown”
section for the proper procedure.
2. Take out the machine screw (key 41) and lift off
the washer (key 44) and handwheel (key 38).
3. Unscrew the packing box (key 32). Unscrew the
packing nut (key 35) and the packing follower
(key 34) off of the adjusting screw (key 33).
4. Unscrew and pull the adjusting screw (key 33) out
through the bottom of the packing box (key 32).
5. Pull out the old packing (key 36) and replace
it with three new packing rings. Replace
the packing box gasket (key 37). Lubricate
packing box gasket with general purpose
Polytetrauoroethylene (PTFE) or lithium grease.
6. Reassemble the stufng box unit by returning
the adjusting screw (key 33) to the inside of the
stufng/packing box (key 32). Slip the packing
follower (key 34) onto the adjusting screw and
into the packing box. Screw on the packing nut
(key 35).
7. Put the stufng/packing box (key 32) back onto the
spring case (key 2). Set the handwheel (key 38) and
washer (key 44) on the adjusting screw (key 33) and
screw in the machine screw (key 41).

MR95 Series
17
Key Description Part Number
Parts Ordering
When corresponding with your local Sales Ofce 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.
Note
In this parts list, parts marked NACE
are intended for corrosion-resistant
service as detailed in the NACE
International Standard MR0175-2002
and/or MR0103.
Optional materials are available to meet
ANSI/NACE MR0175/ISO 15156, please
contact your local Sales Ofce for
special ordering instructions.
Parts List
Key Description Part Number
Parts Kit (included are keys 3, 4, 12, 19, 29,
45, and 63; not all parts are used for all types)
Types MR95H and MR95HP
Stainless steel diaphragm and plug
1/4 NPT Body RMR95HX0012
1/2-inch / DN 15 Body RMR95HX0042
3/4 and 1-inch / DN 20 and 25 Body RMR95HX0072
1-1/2 and 2-inch / DN 40 and 50 Body RMR95HX0102
Neoprene (CR) diaphragm and
Nitrile (NBR)/Brass Disk
1/4 NPT Body RMR95HX0022
1/2-inch / DN 15 Body RMR95HX0052
3/4 and 1-inch / DN 20 and 25 Body RMR95HX0082
1-1/2 and 2-inch / DN 40 and 50 Body RMR95HX0112
Neoprene (CR) diaphragm and
Nitrile (NBR)/416 Stainless steel Disk
1/4 NPT Body RMR95HX0032
1/2-inch / DN 15 Body RMR95HX0062
3/4 and 1-inch / DN 20 and 25 Body RMR95HX0092
1-1/2 and 2-inch / DN 40 and 50 Body RMR95HX0122
Type MR95L
Stainless steel diaphragm and plug
1/4 NPT Body RMR95LX0012
1/2-inch / DN 15 Body RMR95LX0042
3/4 and 1-inch / DN 20 and 25 Body RMR95LX0072
Neoprene (CR) diaphragm and
Nitrile (NBR)/Brass Disk
1/4 NPT Body RMR95LX0022
1/2-inch / DN 15 Body RMR95LX0052
3/4 and 1-inch / DN 20 and 25 Body RMR95LX0082
Neoprene (CR) diaphragm and
Nitrile (NBR)/416 Stainless steel Disk
1/4 NPT Body RMR95LX0032
1/2-inch / DN 15 Body RMR95LX0062
3/4 and 1-inch / DN 20 and 25 Body RMR95LX0092
Parts Kit (included are keys 3, 4, 12, 19, 29,
45, and 63; not all parts are used for
all types) (continued)
Type MR95HT, Stainless Diaphragm and Plug
1/4 NPT Body RMR95HTX012
1/2-inch / DN 15 Body RMR95HTX022
3/4 and 1-inch / DN 20 and 25 Body RMR95HTX032
1-1/2 and 2-inch / DN 40 and 50 Body RMR95HTX042
1 Body See Following Tables
2 Spring Case See Following Tables
3* Orice
Metal-to-metal seat
Types MR95L, MR95LD, MR95H, and MR95HD
1/4 NPT Body Size
416 Stainless Steel GF04856X022
316 Stainless Steel GF04856X032
Hastelloy® C GF04856X052
Monel® GF04856X042
1/2-inch / DN 15 Body Size
416 Stainless Steel GF04841X022
316 Stainless Steel GF04841X032
Stellite® GF04841X062
Hastelloy® C GF04841X052
Monel® GF04841X042
3/4 and 1-inch / DN 20 and 25 Body Sizes
416 Stainless Steel GF04821X022
316 Stainless Steel GF04821X032
Stellite® GF04821X062
Hastelloy® C GF04821X052
Monel® GF04821X042
1-1/2 and 2-inch / DN 40 and 50 Body Sizes
416 Stainless Steel GF04896X022
316 Stainless Steel GF04896X032
Stellite® GF04896X062
Hastelloy® C GF04896X052
Monel® GF04896X042
Type MR95HT
1/4 NPT Body Size
416 Stainless Steel GF04856X022
316 Stainless Steel GF04856X032
1/2-inch / DN 15 Body Size
416 Stainless Steel GF04841X022
316 Stainless Steel GF04841X032
Stellite® GF04841X062
3/4 and 1-inch / DN 20 and 25 Body Sizes
416 Stainless Steel GF04821X022
316 Stainless Steel GF04821X032
Stellite® GF04821X062
1-1/2 and 2-inch / DN 40 and 50 Body Sizes
416 Stainless Steel GF04896X022
316 Stainless Steel GF04896X032
Stellite® GF04896X062
Composition seat
Types MR95L, MR95LD, MR95H, and MR95HD
1/4 NPT Body Size
Brass, Oxygen Service GF05038X012
316 Stainless Steel, NACE(1) GF05038X032
416 Stainless Steel GF05038X022
Monel® GF05038X042
1/2-inch / DN 15 Body Size
Brass, Oxygen Service GF05327X012
316 Stainless Steel, NACE(1) GF05327X032
416 Stainless Steel GF05327X022
Monel® GF05327X042
3/4 and 1-inch / DN 20 and 25 Body Sizes
Brass, Oxygen Service GF04822X012
316 Stainless Steel, NACE(1) GF04822X032
416 Stainless Steel GF04822X022
Monel® GF04822X042
1. NACE MR0175-2002 and MR0103.
*Recommended spare part
Hastelloy® C is a mark owned by Haynes International, Inc.
Monel® is a mark owned by Special Metals Corporation.
Stellite® is a mark owned by Deloro Stellite Holdings Corporation.

MR95 Series
18
3* Orice (continued)
Composition seat (continued)
1-1/2 and 2-inch / DN 40 and 50 Body Sizes
(Types MR95H and MR95HD only)
Brass, Oxygen Service GF05521X012
316 Stainless Steel, NACE(2) GF05521X032
416 Stainless Steel GF05521X022
Monel® GF05521X042
Type MR95HP
1/4 NPT Body Size
316 Stainless Steel, NACE(1) GF05038X032
416 Stainless Steel GF05038X022
1/2-inch / DN 15 Body Size
316 Stainless Steel, NACE(1) GF05327X032
416 Stainless Steel GF05327X022
3/4 and 1-inch / DN 20 and 25 Body Sizes
316 Stainless Steel, NACE(1) GF04822X032
416 Stainless Steel GF04822X022
1-1/2 and 2-inch / DN 40 and 50 Body Sizes
316 Stainless Steel, NACE(2) GF05521X032
416 Stainless Steel GF05521X022
4* Valve Plug, Metal seat See Following Table
4* Valve Plug Assembly, Composition seat See Following Table
4a Disk Holder - - - - - - - - - - -
4b Disk - - - - - - - - - - -
4c O-ring (Type MR95HP only) - - - - - - - - - - -
5 Valve Plug Guide
Types MR95L, MR95LD, MR95H, and MR95HD
1/4 NPT Body Size
Brass, Oxygen Service GF05490X012
416 Stainless Steel GF05490X022
316 Stainless Steel, NACE(1) GF05490X032
Hastelloy® C GF05490X052
Monel® GF05490X042
1/2-inch / DN 15 Body Size
Brass, Oxygen Service GF05519X012
416 Stainless Steel GF05519X022
316 Stainless Steel, NACE(1) GF05519X032
Hastelloy® C GF05519X052
Monel® GF05519X042
3/4 and 1-inch / DN 20 and 25 Body Sizes
Brass, Oxygen Service GF04830X012
416 Stainless Steel GF04830X022
316 Stainless Steel, NACE(1) GF04830X032
Hastelloy® C GF04830X052
Monel® GF04830X042
1-1/2 and 2-inch / DN 40 and 50 Body Sizes
Brass, Oxygen Service GF05510X012
416 Stainless Steel GF05510X022
316 Stainless Steel, NACE(2) GF05510X032
Hastelloy® C GF05510X052
Monel® GF05510X042
Types MR95HP and MR95HT
1/4 NPT Body Size
416 Stainless Steel GF05490X022
316 Stainless Steel, NACE(1) GF05490X032
1/2-inch / DN 15 Body Size
416 Stainless Steel GF05519X022
316 Stainless Steel, NACE(2) GF05519X032
3/4 and 1-inch / DN 20 and 25 Body Sizes
416 Stainless Steel GF04830X022
316 Stainless Steel, NACE(1) GF04830X032
1-1/2 and 2-inch / DN 40 and 50 Body Sizes
416 Stainless Steel GF05510X022
316 Stainless Steel, NACE(2) GF05510X032
6 Stem/Stem Assembly
Types MR95L, MR95LD, MR95H, and MR95HD
1/4 NPT Body Size
416 Stainless Steel, Oxygen Service ERCA00638A0
316 Stainless Steel
Standard ERCA00638A4
NACE(1),Types MR95L and MR95H only ERCA00638A1
Hastelloy® C ERCA00638A3
Monel® ERCA00638A2
1/2-inch / DN 15 Body Size
416 Stainless Steel
Without control line, Oxygen service ERCA00639A0
With control line ERAA01904A0
316 Stainless Steel
Standard ERCA00639A4
NACE
(1) ERCA00639A1
Hastelloy® C ERCA00639A3
Monel® ERCA00639A2
3/4 and 1-inch / DN 20 and 25 Body Sizes
416 Stainless Steel
Without control line, Oxygen service ERCA00640A0
With control line ERAA01896A0
316 Stainless Steel
Standard ERCA00640A4
NACE
(1) ERCA00640A1
Hastelloy® C ERCA00640A3
Monel® ERCA00640A2
1-1/2 and 2-inch / DN 40 and 50 Body Sizes
416 Stainless Steel
Without control line, Oxygen service GF05507X022
With control line ERAA01906A0
316 Stainless Steel
Standard GF05507X062
NACE
(1) GF05507X032
Hastelloy® C GF05507X052
Monel® GF05507X042
Type MR95HT
1/4 NPT Body Size
416 Stainless Steel ERCA00638A0
316 Stainless Steel ERCA00638A4
1/2-inch / DN 15 Body Size
416 Stainless Steel ERCA00639A0
316 Stainless Steel ERCA00639A4
3/4 and 1-inch / DN 20 and 25 Body Sizes
416 Stainless Steel ERCA00640A0
316 Stainless Steel ERCA00640A4
1-1/2 and 2-inch / DN 40 and 50 Body Sizes
416 Stainless Steel, Oxygen Service GF05507X022
316 Stainless Steel, Standard GF05507X062
Type MR95HP
1/4 NPT Body Size
416 Stainless Steel ERCA00638A0
316 Stainless Steel, NACE(1) ERCA00638A1
1/2-inch / DN 15 Body Size
416 Stainless Steel
Without control line ERCA00639A0
With control line ERAA01904A0
316 Stainless Steel, NACE(2) ERCA00639A1
3/4 and 1-inch / DN 20 and 25 Body Sizes
416 Stainless Steel
Without control line ERCA00640A0
With control line ERAA01896A0
316 Stainless Steel, NACE(1) ERCA00640A1
1-1/2 and 2-inch / DN 40 and 50 Body Sizes
416 Stainless Steel, Oxygen Service
Without control line GF05507X022
With control line ERAA01906A0
316 Stainless Steel, NACE(2) GF05507X032
6a Stem - - - - - - - - - - -
6b Pusher Plate (1/4 NPT to 1-inch /
DN 25 Body Sizes only) - - - - - - - - - - -
Key Description Part Number Key Description Part Number
1. NACE MR0175-2002 and MR0103.
2. NACE MR0175-2002.
*Recommended spare part
Hastelloy® C is a mark owned by Haynes International, Inc.
Monel® is a mark owned by Special Metals Corporation.

MR95 Series
19
1. NACE MR0175-2002 and MR0103.
2. NACE MR0175-2002.
*Recommended spare part
Hastelloy® C is a mark owned by Haynes International, Inc.
Monel® is a mark owned by Special Metals Corporation.
6b O-ring (1-1/2 to 2-inch /
DN 40 and 50 Body Sizes only) - - - - - - - - - - -
6c O-ring (1/2 to 1-inch / DN 15 to 25 Body Sizes only) - - - - - - - - - - -
7 Stem Guide Bushing
1/4 NPT Body Size
416 Stainless Steel, Oxygen Service ERCA03695A0
316 Stainless Steel, NACE(1) ERCA03695A1
Hastelloy® C ERCA03695A3
Monel® ERCA03695A2
1/2-inch / DN 15 Body Size
416 Stainless Steel, Oxygen Service ERCA03694A0
316 Stainless Steel, NACE(1) ERCA03694A1
Hastelloy® C ERCA03694A3
Monel® ERCA03694A2
3/4 to 2-inch / DN 20 to 50 Body Sizes
416 Stainless Steel, Oxygen Service ERCA03668A0
316 Stainless Steel, NACE(1) ERCA03668A1
Hastelloy® C ERCA03668A3
Monel® ERCA03668A2
8 Lower Spring Seat, NACE(1)
Types MR95L, MR95LD, MR95H, and MR95HD
1/4 NPT Body Size
Aluminum 1E392309012
Stainless Steel 1E3923X0012
1/2-inch / DN 15 Body Size
Aluminum 1E395408012
Stainless Steel 1E3954X0042
3/4 and 1-inch / DN 20 and 25 Body Sizes
Aluminum 1E398608012
Stainless Steel 1E3986X0042
1-1/2 and 2-inch / DN 40 and 50 Body Sizes
Steel 1P787724152
Stainless Steel 1P7877X0012
Types MR95HP and MR95HT
1/4 NPT Body Size
Steel ERCA00453A0
Stainless Steel ERCA00453A1
1/2-inch / DN 15 Body Size
Steel ERCA00436A0
Stainless Steel ERCA00436A1
3/4 and 1-inch / DN 20 and 25 Body Sizes
Steel 17B8733X012
Stainless Steel 17B8733X022
1-1/2 and 2-inch / DN 40 and 50 Body Sizes
Steel 1P787724152
Stainless Steel 1P7877X0012
9 Upper Spring Seat, NACE(1)
Types MR95L, MR95LD, MR95H, and MR95HD
1/4 NPT Body Size
Steel ERCA00383A0
Stainless Steel ERCA00383A1
1/2-inch / DN 15 Body Size
Steel ERCA00823A0
Stainless Steel ERCA00823A1
3/4 and 1-inch / DN 20 and 25 Body Sizes
Steel 1E398725072
Stainless Steel 1E3987X0012
1-1/2 and 2-inch / DN 40 and 50 Body Sizes
Steel 1P787624092
Stainless Steel 1P7876X0012
Types MR95HP and MR95HT
1/4 NPT Body Size
Steel 14B9950X012
Stainless Steel 14B9950X022
1/2-inch / DN 15 Body Size
Steel ERCA00382A0
Stainless Steel ERCA00382A1
3/4 and 1-inch / DN 20 and 25 Body Sizes
Steel ERCA00138A0
Stainless Steel ERCA00138A1
9 Upper Spring Seat, NACE(1) (continued)
Types MR95HP and MR95HT (continued)
1-1/2 and 2-inch / DN 40 and 50 Body Sizes
Steel 1P787624092
Stainless Steel 1P7876X0012
10 Pusher Post, 1-1/2 and 2-inch / DN 40 and
50 Body Sizes only
Metal-to-metal seat
416 Stainless Steel, Types MR95H,
MR95HD, and MR95HP only GF05509X022
316 Stainless Steel, Types MR95H,
MR95HD, and MR95HP only GF05509X032
Hastelloy® C, Types MR95H and
MR95HD only GF05509X052
Monel®, Types MR95H and
MR95HD only GF05509X042
Composition seat
416 Stainless Steel, Oxygen Service
Types MR95H, MR95HD, and MR95HP only GF05549X022
316 Stainless Steel, NACE(2)
Types MR95H, MR95HD, and MR95HP only GF05549X032
Monel®,Types MR95H and MR95HD only GF05549X042
11 Control Spring, NACE(1) See Table 3
12* Diaphragm See Following Table
13 Nameplate - - - - - - - - - - -
14* Diaphragm Protector, PTFE, NACE(1)
Types MR95L and MR95LD
1/4 NPT Body Size 11A5126X012
1/2-inch / DN 15 Body Size 11A5127X012
3/4 and 1-inch / DN 20 and 25 Body Sizes 11A5128X012
Types MR95H, MR95HP, and MR95HD
1/4 NPT Body Size 11A5129X012
1/2-inch / DN 15 Body Size 11A5130X012
3/4 and 1-inch / DN 20 and 25 Body Sizes 11A5131X012
1-1/2 and 2-inch / DN 40 and 50 Body Sizes 11A5527X012
15 Adjusting Screw, NACE(1)
Square Head Adjustment
1/4 NPT Body Size GF05533X012
1/2-inch / DN 15 Body Size GF05553X012
3/4 and 1-inch / DN 20 and 25 Body Sizes GF05543X012
1-1/2 and 2-inch / DN 40 and 50 Body Sizes GF05522X012
Stainless Steel Square Head Adjustment
1/4 NPT Body Size GF05533X022
1/2-inch / DN 15 Body Size GF05553X022
3/4 and 1-inch / DN 20 and 25 Body Sizes GF05543X022
1-1/2 and 2-inch / DN 40 and 50 Body Sizes GF05522X022
Sealed Square Head Adjustment
1/2-inch / DN 15 Body Size GF05553X012
3/4 and 1-inch / DN 20 and 25 Body Sizes GF05543X012
1-1/2 and 2-inch / DN 40 and 50 Body Sizes GF05522X012
Handwheel Adjustment
1/2-inch / DN 15 Body Size ERAA02331A0
16 Cap Screw, NACE(1)
Types MR95L and MR95LD
1/4 NPT Body Size
Steel (10 required) ERCA00651A0
Stainless Steel (10 required) ERCA00651A1
1/2-inch / DN 15 Body Size
Steel (10 required) ERCA00100A0
Stainless Steel (10 required) ERCA00100A1
3/4 and 1-inch / DN 20 and 25 Body Sizes
Steel (12 required) GF05446X012
Stainless Steel (12 required) GF05446X022
Types MR95H and MR95HD
1/4 NPT Body Size
Steel (6 required) ERCA04149A0
Stainless Steel (6 required) ERCA04149A1
1/2-inch / DN 15 Body Size
Steel (8 required) ERCA00100A0
Stainless Steel (8 required) ERCA00100A1
Key Description Part Number Key Description Part Number

MR95 Series
20
16 Cap Screw, NACE(1) (continued)
Types MR95H and MR95HD (continued)
3/4 and 1-inch / DN 20 and 25 Body Sizes
Steel (8 required) GF05446X012
Stainless Steel (8 required) GF05446X022
1-1/2 and 2-inch / DN 40 and 50 Body Sizes
Steel (8 required) ERCA00601A0
Stainless Steel (8 required) ERCA00601A3
Types MR95HP and MR95HT
1/4 NPT Body Size
Steel (6 required) ERCA04149A2
Stainless Steel (6 required) ERCA04149A3
1/2-inch / DN 15 Body Size
Steel (8 required) ERCA00100A2
Stainless Steel (8 required) ERCA00100A3
3/4 and 1-inch / DN 20 and 25 Body Sizes
Steel (8 required) GF05446X032
Stainless Steel (8 required) GF05446X042
1-1/2 and 2-inch / DN 40 and 50 Body Sizes
Steel (8 required) ERCA00601A2
Stainless Steel (8 required) ERCA00601A3
17 Jam Nut, NACE(1)
Square Head Adjustment
1/4 NPT Body Size ERCA00652A0
1/2-inch / DN 15 Body Size ERCA00380A0
3/4 and 1-inch / DN 20 and 25 Body Sizes GF05453X012
1-1/2 and 2-inch / DN 40 and 50 Body Sizes ERCA00633A0
Stainless Steel Square Head Adjustment
1/4 NPT Body Size ERCA00652A1
1/2-inch / DN 15 Body Size ERCA00380A1
3/4 and 1-inch / DN 20 and 25 Body Sizes GF05453X022
1-1/2 and 2-inch / DN 40 and 50 Body Sizes ERCA00633A1
Sealed Square Head Adjustment
1/2-inch / DN 15 Body Size ERCA00380A0
3/4 and 1-inch / DN 20 and 25 Body Sizes GF05453X012
1-1/2 and 2-inch / DN 40 and 50 Body Sizes ERCA00633A0
Tee Handle Adjustment
1/4 NPT Body Size ERCA00652A0
3/4 and 1-inch / DN 20 and 25 Body Sizes GF05453X012
1-1/2 and 2-inch / DN 40 and 50 Body Sizes ERCA00633A0
Handwheel Adjustment
1/2-inch / DN 15 Body Size ERCA00380A0
18 Nameplate Drive Screw, Stainless Steel
(4 required) ERAA01884A0
19* Diaphragm Gasket
(2 required for pressure loaded spring case)
For 302 Stainless Steel Diaphragm
Types MR95L and MR95LD
1/4 NPT Body Size ERCA00655A0
1/2-inch / DN 15 Body Size ERCA00491A0
3/4 and 1-inch / DN 20 and 25 Body Sizes ERCA00556A0
Types MR95H and MR95HD
1/4 NPT Body Size 1E393104022
1/2-inch / DN 15 Body Size ERCA00485A0
3/4 and 1-inch / DN 20 and 25 Body Sizes ERCA00510A0
1-1/2 and 2-inch / DN 40 and 50 Body Sizes ERCA00526A0
For 302 Stainless Steel Steam Service,
Monel®, and Hastelloy® C Diaphragms
Types MR95L and MR95LD
1/4 NPT Body Size ERCA00655A1
1/2-inch / DN 15 Body Size ERCA00491A1
3/4 and 1-inch / DN 20 and 25 Body Sizes ERCA00556A1
Types MR95H, MR95HT, and MR95HD
1/4 NPT Body Size 1E3931X0012
1/2-inch / DN 15 Body Size ERCA00485A1
3/4 and 1-inch / DN 20 and 25 Body Sizes ERCA00510A1
1-1/2 and 2-inch / DN 40 and 50 Body Sizes ERCA00526A1
19* Diaphragm Gasket (continued)
(2 required for pressure loaded
spring case) (continued)
For Stainless Steel Oxygen Service Diaphragm
Type MR95L
1/4 NPT Body Size ERCA00655A2
1/2-inch / DN 15 Body Size ERCA00491A2
3/4 and 1-inch / DN 20 and 25 Body Sizes ERCA00556A2
Type MR95H
1/4 NPT Body Size 1E3931X0022
1/2-inch / DN 15 Body Size ERCA00485A2
3/4 and 1-inch / DN 20 and 25 Body Sizes ERCA00510A2
1-1/2 and 2-inch / DN 40 and 50 Body Sizes ERCA00526A2
20 Pitot Tube (for constructions without control line)
1/4 NPT Body Size
Copper, Oxygen Service ERCA04393A0
304 Stainless Steel ERCA04393A1
316 Stainless Steel, NACE(1) ERCA04393A2
Hastelloy® C ERCA04393A4
Monel® ERCA04393A3
1/2-inch / DN 15 Body Size
Copper, Oxygen Service ERCA04277A0
304 Stainless Steel ERCA04277A1
316 Stainless Steel, NACE(1) ERCA04277A2
Hastelloy® C ERCA04277A4
Monel® ERCA04277A3
3/4 and 1-inch / DN 20 and 25 Body Sizes
Copper, Oxygen Service GF05550X012
304 Stainless Steel GF05550X022
316 Stainless Steel, NACE(1) GF05550X032
Hastelloy® C GF05550X052
Monel® GF05550X042
1-1/2 and 2-inch / DN 40 and 50 Body Sizes
Copper, Oxygen Service ERCA00381A0
304 Stainless Steel ERCA00381A1
316 Stainless Steel, NACE(1) ERCA00381A2
Hastelloy® C ERCA00381A4
Monel® ERCA00381A3
21 Diaphragm Head Assembly, NACE(1)
(Types MR95L and MR95LD only)
1/4 NPT Body Size
Aluminum/Steel ERCA00641A0
Stainless Steel ERCA00641A1
1/2-inch / DN 15 Body Size
Aluminum/Steel ERCA00642A0
Stainless Steel ERCA00642A1
3/4 and 1-inch / DN 20 and 25 Body Sizes
Aluminum/Steel ERCA00643A0
Stainless Steel ERCA00643A1
21a Diaphragm Head - - - - - - - - - - -
21b Lower Spring Seat - - - - - - - - - - -
21c Screw - - - - - - - - - - -
21 Diaphragm Head, 1-1/2 and 2-inch /
DN 40 and 50 Sizes (2 required)
Plated Steel ERCA00578A0
316 Stainless Steel, NACE(1) and
Oxygen Service ERCA00578A1
Hastelloy® C, Types MR95H and MR95HD only ERCA00578A3
Monel®, Types MR95H and MR95HD only ERCA00578A2
22 Adjusting Screw Assembly
Tee Handle Adjustment
1/4 NPT Body Size, NACE(1) ERAA01707A0
3/4 and 1-inch / DN 20 and 25 Body Sizes ERAA01716A0
1-1/2 and 2-inch / DN 40 and 50 Body Sizes ERAA01694A0
23 Handwheel ERAA02088A0
Key Description Part Number Key Description Part Number
1. NACE MR0175-2002 and MR0103.
*Recommended spare part
Hastelloy® C is a mark owned by Haynes International, Inc.
Monel® is a mark owned by Special Metals Corporation.