Emerson MR95 Instruction Manual
Instruction Manual
February 2015
MR95 Series Pressure Regulators
MR95 Series
P1757
TYPE MR95L
P1753
TYPE MR95H
PRESSURE REDUCING REGULATORS
Figure 1. Typical MR95 Series Pressure Regulators
www.fisherregulators.com
D103587X012
MR95 Series
Specications
This section lists the specications for the MR95 Series regulators. Factory specication such as type, maximum
inlet pressure, maximum temperature, maximum outlet pressure, spring range, orice 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)
Maximum Temperature Ranges of Diaphragm and
Seat Materials
Fluorocarbon (FKM)
Ethylenepropylene (EPDM)
Peruoroelastomer (FFKM)
Polytetrauoroethylene (PTFE)
Stainless steel (SST)
(1)(2)
MATERIAL TEMPERATURE RANGE
Nitrile (NBR)
Neoprene (CR)
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
Maximum Temperature Ranges of Body Materials
BODY AND SPRING CASE MATERIAL TEMPERATURE RANGE
Gray Cast Iron
Stainless steel
Aluminum-Bronze
WCC Steel
LCC Steel
Monel
Hastelloy® C
(4)
(4)
®
differential pressures
Body and Orice Sizes
1/4 NPT body: 0.284 in. / 7.22 mm orice
1/2 in. / DN 15 body: 0.416 in. / 10.56 mm orice
3/4 and 1 in. / DN 20 and 25 Body Sizes:
0.631 in. / 16.02 mm orice
1-1/2 and 2 in. / DN 40 and 50 Body Sizes
(not available for Types MR95L and MR95LD):
1.142 in. / 29 mm orice
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 in.
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 Classication Per ANSI/FCI 70-3-2004
Metal Seats: Class IV
Elastomer Seats: Class VI or better
PTFE: Class IV
Flow and Sizing Coefcients
Relief Sizing Coefcients for MR95 Series
Regulators with Reduced Flow Orices
See Table 6
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 in. / DN 15 body size of
Types MR95L, MR95H, MR95HP and MR95HT
Tee handle:
Optional for other body sizes (except 1/2 in. /
DN 15) of Types MR95L, MR95H, MR95HP
and MR95HT
Approximate Weights
MR95H Series:
1/4 NPT body: 5 lbs / 2.3 kg
1/2 in. / DN 15 body: 10 lbs / 4.5 kg
3/4 and 1 in. / DN 20 and 25 Body Sizes:
22 lbs / 10 kg
1-1/2 and 2 in. / DN 40 and 50 Body Sizes:
55 lbs / 25 kg
MR95L Series:
1/4 NPT body: 7 lbs / 3.2 kg
1/2 in. / DN 15 body: 15 lbs / 6.8 kg
3/4 and 1 in. / DN 20 and 25 Body Sizes:
35 lbs / 16 kg
See Table 5
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.
4. Meets API 614 requirements (with Stainless steel trim).
Monel® is a mark owned by Special Metals Corporation.
Hastelloy® C is a mark owned by Haynes International, Inc.
2
-40 to 180°F / -40 to 82°C
(3)
(4)
-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
-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
(1)(2)
MR95 Series
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. (Emerson™) 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 unqualied
personnel may result in improper
adjustment and unsafe operation. Either
condition may result in equipment
damage or personal injury. Only a
qualied person shall install or service
the MR95 Series regulator.
Introduction
Scope of the Manual
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 to 2.1 bar with three different springs
available. Body sizes are available from 1/4 NPT and
1/2 through 1 in. / DN 15 through 25 with a variety
of end connections. The standard orice sizes are
0.284, 0.416 and 0.631 in. / 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 in. / DN 15, 20 and 25 sizes. Also
available in 1-1/2 and 2 in. / DN 40 and 50 sizes with a
1.142 in. / 29 mm orice 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.
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
Monel® is a mark owned by Special Metals Corporation.
Hastelloy® C is a mark owned by Haynes International, Inc.
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.
3
MR95 Series
ADJUSTING SCREW
CONTROL SPRING
DIAPHRAGM
PITOT TUBE
STEM
VALVE PLUG
CONTROL LINE TAP
FRONT AND INTERNAL VIEW OF
TYPE MR95H WITH INTERNAL
PRESSURE REGISTRATION
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
SPRING
GASKET
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)
METAL DIAPHRAGMS
Figure 2. MR95 Series Operational Schematics
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.
BACK VIEW OF
1/2 IN. / DN 15 TYPE MR95H
WITH EXTERNAL
PRESSURE REGISTRATION
SPRING
TYPE MR95L (1/4 NPT, 2 to 6 psi / 0.14 to 0.41 bar RANGE)
WITH METAL DIAPHRAGM
SIDE AND INTERNAL VIEW OF
3/4 TO 2 IN. / DN 20 TO 50
TYPE MR95H WITH EXTERNAL
PRESSURE REGISTRATION
(ALSO TYPICAL OF TYPE MR95L,
1/2 TO 2 IN. / DN 15 TO 50 BODY SIZES)
METAL DIAPHRAGM
GASKET
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 orice 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 orice. This allows uid ow through the body
to the downstream system.
4
Type 95HD Differential Pressure Reducing Regulator
M1006
October 2006
Type 95HD
HANDWHEEL
CONTROL SPRING
PRESSURE A*
(SPRING CASE
LOADING
PRESSURE)
MR95 Series
DIAPHRAGM
PITOT TUBE
STEM
ORIFICE
VALVE PLUG
TYPE MR95HD WITH INTERNAL PRESSURE REGISTRATION
INLET PRESSURE
OUTLET PRESSURE
LOADING PRESSURE
*PRESSURE A MAY BE SUPPLIED BY ANOTHER PRESSURE SYSTEM OR A MANUAL LOADING REGULATOR.
FRONT AND INTERNAL VIEW OF
Figure 2. MR95 Series Operational Schematics (continued)
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
PRESSURE A*
SPRING SETTING =
PRESSURE B
PRESSURE B
(OUTLET
PRESSURE)
TYPE MR95HD WITH EXTERNAL PRESSURE REGISTRATION
BACK VIEW OF
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 orice. 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.
CONTROL LINE TAP
5
MR95 Series
Table 1. Types MR95L and MR95LD Regulators Body Constructions
BODY SIZE BODY CONSTRUCTION END CONNECTION
1/4 NPT Without Control Line and Gauge Port NPT
Without Control Line and Gauge Port
1/2 in. / DN 15
With Control Line but Without Gauge Port
Without Control Line and Gauge Port
3/4 in. / DN 20
1 in. / DN 25
- Shaded areas indicate that the construction is available.
- Blank areas indicate that you need to contact your local Sales Ofce for the availability of the constructions.
With Control Line but Without Gauge Port
With Gauge Port but Without Control Line
Without Control Line and Gauge Port
With Control Line but Without Gauge Port
With Gauge Port but Without Control Line
NPT
SWE
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
NPT
SWE
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
NPT
SWE
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
BODY MATERIAL
Gray Cast Iron
LCC or WCC Steel
CF8M Stainless Steel
®
®
CF3M Stainless Steel
C
or Hastelloy
Monel
Monel® is a mark owned by Special Metals Corporation.
Hastelloy® C is a mark owned by Haynes International, Inc.
6
Table 2. Types MR95H, MR95HD, MR95HT and MR95HP Regulators Body Constructions
BODY SIZE BODY CONSTRUCTION END CONNECTION
1/4 NPT Without Gauge Port and Control Line NPT
Without Control Line and Gauge Port
1/2 in. / DN 15
With Control Line but Without Gauge Port
Without Gauge Port and Control Line
3/4 in. / DN 20
With Control Line but Without Gauge Port
With Gauge Port but Without Control Line
1 in. / DN 25 Without Gauge Port and Control Line
- Shaded areas indicate that the construction is available.
- Blank areas indicate that you need to contact your local Sales Ofce for the availability of the constructions.
1. Gray cast iron body material is available for Types MR95H and MR95HD only.
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
NPT
Welded CL150 RF
Welded CL300 RF
Welded CL600 RF
Welded PN 16/25/40 RF
NPT
SWE
Welded CL150 RF
Welded CL300 RF
Welded CL600 RF
Welded PN 16/25/40 RF
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
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
MR95 Series
BODY MATERIAL
C
(1)
Gray Cast Iron
LCC or WCC Steel
®
or Hastelloy
®
CF8M Stainless Steel
CF3M Stainless Steel
Monel
Aluminum-Bronze
Monel® is a mark owned by Special Metals Corporation.
Hastelloy® C is a mark owned by Haynes International, Inc.
- continued -
7
MR95 Series
Table 2. Types MR95H, MR95HD, MR95HT and MR95HP Regulators Body Constructions (continued)
BODY SIZE BODY CONSTRUCTION END CONNECTION
With Control Line but Without Gauge Port
1 in. / DN 25
With Gauge Port but Without Control Line
Without Gauge Port and Control Line
1-1/2 in. / DN 40
With Control line but Without Gauge Port
With Gauge Port but Without Control Line
Without Gauge Port and Control Line
2 in. / DN 50
With Control Line but Without Gauge Port
With Gauge Port but Without Control Line
- Shaded areas indicate that the construction is available.
- Blank areas indicate that you need to contact your local Sales Ofce for the availability of the constructions.
1. Gray cast iron body material is available for Types MR95H and MR95HD only.
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
NPT
SWE
Welded CL150 RF
Welded CL300 RF
Welded CL600 RF
Welded PN 16/25/40 RF
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
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
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
NPT
Welded CL150 RF
Welded CL300 RF
Welded PN 16/25/40 RF
BODY MATERIAL
(1)
Gray Cast Iron
LCC or WCC Steel
CF8M Stainless Steel
C
®
or Hastelloy
®
Aluminum-Bronze
CF3M Stainless Steel
Monel
Monel® is a mark owned by Special Metals Corporation.
Hastelloy® C is a mark owned by Haynes International, Inc.
8
MR95 Series
Table 3. MR95 Series Outlet and Differential Pressure Ranges and Spring Information
TYPE
BODY SIZE
OUTLET OR DIFFERENTIAL
PRESSURE RANGE
In. DN psi/psig bar In. mm In. mm
2 to 6 0.14 to 0.41 0.148 3.76 2.00 50.8 Zinc-plated steel 1E392527022 Yellow
1/4 - - - -
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
2 to 6 0.14 to 0.41 0.207 5.26 2.50 63.5 Powder-coated steel ERCA04288A0 Yellow
MR95L
and
MR95LD
1/2 15
3/4
and 1
and 25
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
2 to 6 0.14 to 0.41 0.306 7.77 4.00 102 Powder-coated steel 1E398927022 Yellow
20
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
2 to 6 0.14 to 0.41 0.306 7.77 4.00 102 Powder-coated Stainless steel 1E3989X0052 Yellow
3/4
20
and 1
and 25
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
15 to 30 1.0 to 2.1 0.148 3.76 2.00 50.8 Zinc-plated steel 1E392527022 Yellow
1/4 - - - -
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
15 to 30 1.0 to 2.1 0.207 5.26 2.50 63.5 Powder-coated steel ERCA04288A0 Yellow
1/2 15
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
15 to 30 1.0 to 2.1 0.306 7.77 4.00 102 Powder-coated steel 1E398927022 Yellow
3/4
20
MR95H
and
MR95HD
and 1
3/4
and 1
and 25
and 25
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
15 to 30 1.0 to 2.1 0.306 7.77 4.00 102 Powder-coated Stainless steel 1E3989X0052 Yellow
20
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
5 to 80 0.34 to 5.5 0.500 12.7 6.50 165 Powder-coated steel ERCA04290A0
1-1/2
40
and 2
and 50
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 1P7888X0022 Black
1/4 - - - -
1/2 15
MR95HT
3/4
and 1
and 25
1-1/2
and 2
and 50
1/4 - - - -
1/2 15
MR95HP
3/4
and 1
and 25
1-1/2
and 2
and 50
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
15 to 100 1.0 to 6.9 0.192 4.88 2.00 50.8 Inconel
80 to 300 5.5 to 20.7 0.281 7.14 2.00 50.8 Inconel
15 to 100 1.0 to 6.9 0.281 7.14 2.50 63.5 Inconel
80 to 300 5.5 to 20.7 0.375 9.53 2.60 66.0 Inconel
15 to 100 1.0 to 6.9 0.437 11.1 4.08 104 17-4 PH Stainless steel ERCA04295A0 Unpainted
20
80 to 300 5.5 to 20.7 0.562 14.3 4.08 104 17-4 PH Stainless steel ERCA04296A0 Unpainted
15 to 100 1.0 to 6.9 0.625 15.9 6.70 170 17-4 PH Stainless steel
40
60 to 260 4.1 to 17.9 0.812 20.6 6.70 170 17-4 PH Stainless steel ERCA04298A0 Unpainted
15 to 100 1.0 to 6.9 0.192 4.88 2.00 50.8 Inconel
80 to 400 5.5 to 27.6 0.281 7.14 2.00 50.8 Inconel
15 to 100 1.0 to 6.9 0.281 7.14 2.50 63.5 Inconel
80 to 400 5.5 to 27.6 0.375 9.53 2.60 66.0 Inconel
15 to 100 1.0 to 6.9 0.437 11.1 4.08 104 17-4 PH Stainless steel ERCA04295A0 Unpainted
20
80 to 400 5.5 to 27.6 0.562 14.3 4.08 104 17-4 PH Stainless steel ERCA04296A0 Unpainted
15 to 100 1.0 to 6.9 0.625 15.9 6.70 170 17-4 PH Stainless steel ERCA04297A0 Unpainted
40
60 to 300 4.1 to 20.7 0.812 20.6 6.70 170 17-4 PH Stainless steel ERCA04298A0 Unpainted
(1)
SPRING WIRE
DIAMETER
SPRING FREE
LENGTH
SPRING
MATERIAL
(2)
®
®
®
®
SPRING PART
NUMBER
Black with
Light Blue Stripe
ERCA04292A0 Unpainted
ERCA04291A0 Unpainted
ERCA04294A0 Unpainted
ERCA04293A0 Unpainted
ERCA04297A0 Unpainted
®
®
®
®
ERCA04292A0 Unpainted
ERCA04291A0 Unpainted
ERCA04294A0 Unpainted
ERCA04293A0 Unpainted
SPRING
COLOR
®
Inconel
is a mark owned by Special Metals Corporation.
9
MR95 Series
Table 4. Maximum Cold Working Pressures of Body Size and Material
TYPE BODY SIZE BODY MATERIAL
MAXIMUM INLET
PRESSURE
MAXIMUM OUTLET
PRESSURE
(1)(2)
MAXIMUM SPRING CASE
PRESSURE
psig bar psig bar psig bar
Gray cast iron 250 17.2 50 3.4 50 3.4
WCC Steel 300 20.7 125 8.6 125 8.6
MR95L and
MR95LD
All available
(3)
sizes
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
Hastelloy
®(4)
® C(4)
300 20.7 125 8.6 125 8.6
300 20.7 125 8.6 125 8.6
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
MR95H and
MR95HD
All available
(3)
sizes
CF8M Stainless steel 300 20.7 300 20.7 300 20.7
CF3M Stainless steel 300 20.7 300 20.7 300 20.7
Aluminum-Bronze
Monel
Hastelloy
®(4)
® C(4)
300 20.7 300 20.7 300 20.7
(4)
300 20.7 300 20.7 300 20.7
300 20.7 300 20.7 300 20.7
WCC Steel 1000 68.9 600 41.4 300 20.7
LCC Steel 1000 68.9 600 41.4 300 20.7
MR95HP
All available
(3)
sizes
CF8M Stainless steel 1000 68.9 550 37.9 300 20.7
CF3M Stainless steel 1000 68.9 550 37.9 300 20.7
Aluminum-Bronze
Monel
Hastelloy
®(4)
® C(4)
1000 68.9 550 37.9 300 20.7
(4)
1000 68.9 550 37.9 300 20.7
1000 68.9 550 37.9 300 20.7
WCC Steel 600 41.4 600 41.4 300 20.7
LCC Steel 600 41.4 600 41.4 300 20.7
1/4 NPT and
1/2 to 1 in. /
DN 15 to 25
MR95HT
CF8M Stainless steel 600 41.4 550 37.9 300 20.7
CF3M Stainless steel 600 41.4 550 37.9 300 20.7
Aluminum-Bronze
Monel
Hastelloy
®(4)
® C(4)
600 41.4 550 37.9 300 20.7
(4)
600 41.4 550 37.9 300 20.7
600 41.4 550 37.9 300 20.7
WCC Steel 600 41.4 450 31.0 300 20.7
LCC Steel 600 41.4 450 31.0 300 20.7
1-1/2 and 2 in. /
DN 40 and 50
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
Hastelloy
®
®
C 600 41.4 450 31.0 300 20.7
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.
Table 5. Types MR95LD and MR95HD Flow and Sizing Coefficient
BODY SIZE
In. DN C
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
2
Km = F
L
Table 6. Relief Sizing Coefficients for MR95 Series Regulators with Reduced Flow Orifices
In. DN C
1/4 - - - - 28 28
1/2 15 70 67
3/4 and 1 20 and 25 156 156
1-1/2 and 2 40 and 50 482 475
1. The reduced ow orice option offers similar ow capacity as the equivalent 95 Series conguration.
®
is a mark owned by Special Metals Corporation.
Monel
Hastelloy® C is a mark owned by Haynes International, Inc.
10
WIDE-OPEN COEFFICIENT
(FOR RELIEF SIZING)
v
BODY SIZE
C
C
g
C
s
1
K
m
WIDE-OPEN COEFFICIENT FOR
MR95 SERIES REDUCED FLOW OPTION
g
IEC SIZING COEFFICIENT
X
T
F
D
(1)
WIDE-OPEN COEFFICIENT FOR
LEGACY 95 SERIES
C
g
F
L
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