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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
Specications



Available Constructions
Type MR95L: 


Type MR95H: 

Type MR95HP: 


Type MR95HT: 



Type MR95LD:󰀨
󰀨




Type MR95HD:󰀨
󰀨


Type MR95HDP:󰀨
󰀨


Body and Orice 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 Di󰀨erential 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󰀨 Classication 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 Coe󰀩cients

Relief Sizing Coe󰀩cients for MR95 Series
Regulators with Reduced Flow Orices

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:

Specications (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

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






󰀩


- 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



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


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
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SWE
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
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


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


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SWE

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



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
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
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
󰀩


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      
K2
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 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







Product Description
󰀨





Pressure Reducing Regulators



.
Dierential Pressure Regulators

󰀨
󰀨


󰀨

Principle of Operation
For Types MR95H, MR95L,
MR95HP and MR95HT
Pressure Reducing Regulators













For Types MR95LD, MR95HD and
MR95HDP Di󰀨erential 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