Emerson Fisher MR95 Series User manual
MR95 Series
June 2020
MR95 Series Pressure Regulators
TYPE MR95L
TYPE MR95H
PRESSURE REDUCING REGULATORS
Figure 1. Typical MR95 Series Pressure Regulators
Instruction Manual
D103587X012
2
MR95 Series
Specications
Available Constructions
Type MR95L:
Type MR95H:
Type MR95HP:
Type MR95HT:
Type MR95LD:
Type MR95HD:
Type MR95HDP:
Body and Orice Sizes
1/4 NPT body:
1/2 in. / DN 15 body:
3/4 and 1 in. / DN 20 and 25 Body Sizes:
1-1/2 and 2 in. / DN 40 and 50 Body Sizes
(not available for Types MR95L and MR95LD):
End Connection Styles
Outlet and Dierential Pressure Ranges(1)
Maximum Spring Case Loading Pressure for
Types MR95LD, MR95HD and MR95HDP
Maximum Cold Working Pressures of Body Size
and Materials(1)
Pressure Registration
Shuto Classication Per ANSI/FCI 70-3-2004
Metal Seats:
Elastomer Seats:
PTFE:
Maximum Temperature Ranges of Diaphragm,
Trim, Seat and Body Materials(1)(2)(3)
Flow and Sizing Coecients
Relief Sizing Coecients for MR95 Series
Regulators with Reduced Flow Orices
API 614 Compliant
Sour Gas Service Capability
Pressure Setting Adjustment
Adjusting screw:
Handwheel:
Tee handle:
Monel®
®
3
MR95 Series
Approximate Weights
MR95H Series:
1/4 NPT body:
1/2 in. / DN 15 body:
3/4 and 1 in. / DN 20 and 25 Body Sizes:
1-1/2 and 2 in. / DN 40 and 50 Body Sizes:
MR95L Series:
1/4 NPT body:
1/2 in. / DN 15 body:
3/4 and 1 in. / DN 20 and 25 Body Sizes:
Specications (continued)
Table 1. Types MR95L and MR95LD Regulators Body Constructions
BODY SIZE BODY CONSTRUCTION END CONNECTION
BODY MATERIAL
Gray Cast Iron
LCC or WCC Steel(1)
CF8M Stainless Steel(1)
CF3M Stainless Steel(1)
Monel®or Hastelloy®C(1)
SWE
SWE
SWE
Monel®
®
MR95 Series
Table 2. Types MR95H, MR95HD, MR95HDP, MR95HT and MR95HP Regulators Body Constructions
BODY SIZE BODY CONSTRUCTION END CONNECTION
BODY MATERIAL
Gray Cast Iron(1)
LCC or WCC Steel(2)
CF8M Stainless Steel(2)
CF3M Stainless Steel(2)
Monel®or Hastelloy®C(2)
Aluminum-Bronze
SWE
SWE
SWE
- continued -
Monel®
®
5
MR95 Series
Table 2. Types MR95H, MR95HD, MR95HDP, MR95HT and MR95HP Regulators Body Constructions (continued)
BODY SIZE BODY CONSTRUCTION END CONNECTION
BODY MATERIAL
Gray Cast Iron(1)
LCC or WCC Steel(2)
CF8M Stainless Steel(2)
CF3M Stainless Steel(2)
Monel®or Hastelloy®C(2)
Aluminum-Bronze
SWE
SWE
Monel®
®
MR95 Series
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
In. DN psi/psig bar In. mm In. mm
1E392527022
5 to 15
13 to 30
15
5 to 15
13 to 30
20
102 1E398927022
5 to 15 102
13 to 30 102
102 1E3989X0052
5 to 15 Stainless steel
13 to 30 102 Stainless steel
MR95HD
MP95HDP
15 to 30 1E392527022
25 to 75
70 to 150
15
15 to 30
25 to 75
70 to 150
20
15 to 30 102 1E398927022
25 to 75 102
70 to 150 102
15 to 30 102 1E3989X0052
25 to 75 Stainless steel
70 to 150 102 Stainless steel
5 to 80
120 to 150 1P7888X0022
Inconel®
50 to 120 Inconel®
MR95HT
15 to 100 Inconel®
80 to 300 Inconel®
15 15 to 100 Inconel®
80 to 300 Inconel®
20
15 to 100
80 to 300
15 to 100 170
170
MR95HP
15 to 100 Inconel®
Inconel®
15 15 to 100 Inconel®
Inconel®
20
15 to 100
15 to 100 170
170
®
Inconel®
7
MR95 Series
Table 4. Maximum Cold Working Pressures of Body Size and Material(1)(2)
TYPE BODY SIZE BODY MATERIAL MAXIMUM INLET PRESSURE MAXIMUMOUTLETPRESSURE MAXIMUM SPRING CASE
PRESSURE
psig bar psig bar psig bar
250 50 50
300 125 125
300 125 125
300 125 125
300 125 125
Monel 300 125 125
® 300 125 125
MR95HD
250 250 250
300 300 300
300 300 300
300 300 300
300 300 300
Monel 300 300 300
® 300 300 300
300 300 300
MR95HDP
550 550
550 550
Monel 550 550
® 550 550
550 550
MR95HP
1000
1000
1000 550 550
1000 550 550
Monel 1000 550 550
® 1000 550 550
1000 550 550
MR95HT
550 550
550 550
Monel 550 550
® 550 550
550 550
Monel®
®
Monel®
®
8
MR95 Series
Table 5. MR95 Series Temperature Capabilities(1)(2)(5)
TRIM MATERIAL SEAT DIAPHRAGM O-RING DIAPHRAGM
PROTECTOR GASKET TEMPERATURE
°F °C
20 to 275
Metal
BODY MATERIAL TEMPERATURE
°F °C
Stainless steel®®
Table 6. Types MR95LD, MR95HD and MR95HDP Flow and Sizing Coefficient
BODY SIZE WIDE-OPEN COEFFICIENT
(FOR RELIEF SIZING) C1Km
IEC SIZING COEFFICIENT
In. DN CvCgCsXTFDFL
37
15 103
221
700
K2
Table 7. Relief Sizing Coefficients for MR95 Series Regulators with Reduced Flow Orifices(1)
BODY SIZE WIDE-OPEN COEFFICIENT FOR
MR95 SERIES REDUCED FLOW OPTION
WIDE-OPEN COEFFICIENT FOR LEGACY
95 SERIES
In. DN CgCg
28 28
15 70
Monel®
®
!
9
MR95 Series
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
Product Description
Pressure Reducing Regulators
.
Dierential Pressure Regulators
Principle of Operation
For Types MR95H, MR95L,
MR95HP and MR95HT
Pressure Reducing Regulators
For Types MR95LD, MR95HD and
MR95HDP Dierential Pressure Regulators
WARNING
10
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
BACK VIEW OF
1/2 IN. / DN 15 TYPE MR95H
WITH EXTERNAL
PRESSURE REGISTRATION
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)
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
SPRING METAL DIAPHRAGMS
GASKET
SPRING METAL DIAPHRAGM
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)
TYPE MR95L (1/4 NPT, 2 to 6 psi / 0.14 to 0.41 bar RANGE)
WITH METAL DIAPHRAGM
Figure 2. MR95 Series Operational Schematics
Type 95HD Differential Pressure Reducing Regulator
M1006
October 2006 Type 95HD
!
11
MR95 Series
P2111_1
Installation
Personal injury or system damage
may result if this regulator is installed,
without appropriate overpressure
protection, where service conditions
could exceed the limits given in the
Specications 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.
HANDWHEEL
CONTROL SPRING
DIAPHRAGM
PITOT TUBE
STEM
ORIFICE
VALVE PLUG
PRESSURE A*
(SPRING CASE
LOADING PRESSURE)
PRESSURE A*
SPRING SETTING =
PRESSURE B
PRESSURE B
(OUTLET PRESSURE)
FRONT AND INTERNAL VIEW OF TYPES MR95HD AND MR95HDP
WITH INTERNAL PRESSURE REGISTRATION
BACK VIEW OF TYPES MR95HD AND MR95HDP
WITH EXTERNAL PRESSURE REGISTRATION
CONTROL LINE TAP
INLET PRESSURE
OUTLET PRESSURE
LOADING PRESSURE
*PRESSURE A MAY BE SUPPLIED BY ANOTHER PRESSURE SYSTEM OR A MANUAL LOADING REGULATOR.
Figure 2. MR95 Series Operational Schematics (continued)
TYPE MR95LD REGULATOR (ALSO TYPICAL OF TYPES MR95HD AND MR95HDP)
Figure 3. Differential Pressure Regulator Installation Schematics
PLANT AIR
ATMOSPHERE
BLOCK
VALVE
(INLET) VENT (OUTLET) VENT
TYPE 67CFR REGULATOR
WARNING
!
12
MR95 Series
All pressure equipment should be installed
in a non-seismic area; should not be
exposed to re; and should be protected
from thunderbolt (lightning) strikes.
•
•
•
•
•
Overpressure Protection
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
Specications 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.
Startup
Note
The Specications section and Tables 3
and 4 show the maximum inlet, the
dierential and the outlet pressures for
specic constructions. Use pressure
gauges to monitor inlet pressure, outlet
pressure and any loading pressure
during startup.
WARNING
!
!
13
MR95 Series
Adjustment
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.
Types MR95L, MR95H, MR95HP
and MR95HT
Types MR95LD, MR95HD and MR95HDP
Shutdown
Maintenance
To avoid personal injury, property damage
or equipment damage caused by sudden
release of pressure or explosion of
accumulated gas, do not attempt any
maintenance or disassembly without
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 o 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
Emerson 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.
WARNING
WARNING
MR95 Series
Replacement or Maintenance of Orice
and Valve Plug
Flange Cap Screw Torque Inspection
Replacement of Diaphragm
Metal diaphragms have thin sharp
edges. To avoid hand cuts, be careful
when handling the diaphragm and
particularly the diaphragm edge.
For Types MR95L, MR95H, MR95HP and
MR95HT
For Types MR95LD, MR95HD and MR95HDP—
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.
For Types MR95HD and MR95HDP and 1/4 NPT to
1 in. / DN 25 body sizes of Types MR95H, MR95HP
and MR95HT
For Types MR95L and MR95LD
CAUTION
CAUTION
15
MR95 Series
DIAPHRAGM (KEY 12)
GASKET (KEY 19)
GASKET (KEY 19)
DIAPHRAGM (KEY 12)
GASKET (KEY 19)
TYPES MR95L AND MR95H METAL DIAPHRAGM TYPES MR95LD, MR95HD AND MR95HDP 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
LOCKNUT (KEY 31) LOCKNUT (KEY 31)
LOCK WASHER (KEY 28)
LOCK WASHER (KEY 28)
LOWER SPRING SEAT (KEY 8)
LOWER SPRING SEAT (KEY 8)
DIAPHRAGM HEAD (KEY 21) DIAPHRAGM HEAD (KEY 21)
DIAPHRAGM(S) (KEY 12) DIAPHRAGM(S) (KEY 12)
GASKET (KEY 45)
DIAPHRAGM HEAD (KEY 21) DIAPHRAGM HEAD (KEY 21)
GASKET (KEY 29)
GASKET (KEY 29)
PUSHER POST (KEY 10)
COMPOSITION DIAPHRAGM METAL DIAPHRAGM
Table 8. Number of Diaphragms Required
BODY SIZE TYPE SPRING RANGE DIAPHRAGM MATERIAL NUMBER OF DIAPHRAGM
1
1
1
Metal 2
Metal 1
MR95HDP
Metal 2
1
1
1
Metal 2
1
2
1
Figure 5. Diaphragm Assembly for MR95 Series with 1-1/2 and 2 in. / DN 40 and 50 Body Sizes
PUSHER POST (KEY 10)
MR95 Series
Replacement of Packing
(Types MR95LD, MR95HD and
MR95HDP only)
Table 9. Torque Specifications
BODY SIZE SPRING CASE BOLT(1)(2) ORIFICE PLUG GUIDE
In. DN Ft-Lb N•m Ft-Lb N•m Ft-Lb N•m
15
10 to 13
8 to 11
13 to 18
180 to 200
8 to 11
50 to 58
75 to 90
100 to 125
170 to 200
102 to 122
230 to 271
17
MR95 Series
Parts Ordering
Note
In this parts list, parts marked NACE
are intended for corrosion-resistant
service as detailed in the NACE
International Standard MR0175-2002,
MR0103, and/or ANSI/NACE MR0175/
ISO 15156.
Parts List
Key Description Part Number
®
Monel®
®
Monel®
®
Monel®
®
Monel®
Monel®
Monel®
Monel®
Monel®
®
Monel®
Key Description Part Number
18
MR95 Series
®
Monel®
®
Monel®
®
Monel®
®
Monel®
®
Monel®
With control line
®
Monel®
With control line
®
Monel®
With control line
®
Monel®
With control line
With control line
Key Description Part Number Key Description Part Number
®
Monel®
19
MR95 Series
With control line
®
Monel®
®
Monel®
®
Monel®
1E392309012
Stainless steel 1E3923X0012
Steel
Stainless steel 1P7877X0012
Steel
Steel
Steel
Steel
Stainless steel 1P7877X0012
Steel
Steel
Steel 1E398725072
Stainless steel 1E3987X0012
Steel
Steel
Steel
Steel
Steel
®
Monel®
Monel®
Key Description Part Number Key Description Part Number
®
Monel®
20
MR95 Series
®
®
®
Monel®
®
Monel®
®
Monel®
®
Monel®
®
Monel®
Key Description Part Number Key Description Part Number
®
Monel®
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