Emerson Fisher MR95 Series, Fisher MR95L, Fisher MR95H, Fisher MR95HT, Fisher MR95HD Installation Manual

Installation Guide
D103587X014

July 2017

MR95 Series

Introduction

This Installation Guide provides instructions for installation, startup
and adjustment. To receive a copy of the Instruction Manual, contact
your local Sales Office or view a copy at www.fisher.com. For further
information refer to MR95 Series Instruction Manual, D103587X012.

PED Category

This product may be used as a safety accessory with pressure
equipment in the following Pressure Equipment Directive. It may
also be used outside of the Pressure Equipment Directive using
Sound Engineering Practice (SEP) per table below. For information
on the current PED revision see Bulletin: D103053X012.

TYPE PRODUCT SIZE BODY MATERIAL CATEGORY

MR95L/

MR95LD

MR95H/

MR95HD

MR95HP/
MR95HT/

MR95HDP

1/4 NPT, DN 15 to 25 /

1/2 to 1 in.

1/4 NPT, DN 15 to 25 /

1/2 to 1 in.

DN 40 and 50 /

1-1/2 and 2 in.

1/4 NPT, DN 15 to 25 /

1/2 to 1 in.

DN 40 and 50 /

1-1/2 and 2 in.

All SEP

All SEP

Cast iron I

Steel and

Stainless steel

All SEP

Steel and

Stainless steel

II

II

Specications

Available Constructions

Type MR95L: Pressure reducing regulator for outlet pressures
from 0.14 to 2.1 bar / 2 to 30 psig. 1/4 to 1 in. body sizes only.

Type MR95H: Pressure reducing regulator for outlet pressures
from 0.34 to 10.3 bar / 5 to 150 psig.

Type MR95HP: Pressure reducing regulator for outlet
pressures from 1.0 to 27.6 bar / 15 to 400 psig (soft-seated).

Type MR95HT: High temperature pressure reducing regulator
for outlet pressures from 1.0 to 20.7 bar / 15 to 300 psig
(metal seat) and up to 343°C / 650°F.

Type MR95LD: Pressure reducing differential regulator for
differential set pressures from 0.14 to 2.1 bar / 2 to 30 psi with
maximum inlet pressure up to 20.7 bar / 300 psi and maximum
outlet pressure up to 8.6 bar / 125 psi. 1/4 to 1 in. body
sizes only.

Type MR95HD: Pressure reducing differential regulator for
differential set pressures from 0.34 to 10.3 bar / 5 to 150 psi
with maximum inlet/outlet pressures up to 20.7 bar / 300 psig.

Type MR95HDP: Pressure reducing differential regulator for
differential set pressures from 0.34 to 10.3 bar / 5 to 150 psi
with maximum inlet/outlet pressures up to 41.4 bar / 600 psi.

Body and Orifice Sizes

1/4 NPT body: 7.22 mm / 0.284 in. orifice

DN 15 / 1/2 in. body: 10.56 mm / 0.416 in. orifice

DN 20 and 25 / 3/4 and 1 in. bodies: 16.02 mm / 0.631 in. orifice

DN 40 and 50 / 1-1/2 and 2 in. bodies (not available for
Types MR95L and MR95LD): 29 mm / 1.142 in. orifice

End Connection Styles

NPT, SWE, Welded and Integral CL150 RF, CL300 RF,
CL600 RF and PN 16/25/40 RF; all sizes are fabricated with
slip-on flanges (for welded end connections) and are EN
flanged 356 mm face-to-face (14 in. face-to-face)

Outlet and Differential Pressure Ranges

(1)

See Table 1

Maximum Spring Case Loading Pressure for
Types MR95LD, MR95HD and MR95HDP

See Table 2

Maximum Cold Working Pressures of
Body Size and Materials

(1)(2)

See Table 2

Pressure Registration

Internal or External

Maximum Temperature Ranges of
Diaphragm and Seat Materials

(1)(2)

See Table 3

Shutoff Classification Per ANSI/FCI 70-3-2004

Metal Seats: Class IV

PTFE: Class IV

Elastomer Seats: Class VI or better

API 614 Compliant

Steel or Stainless steel constructions with Stainless steel trim
meet API 614 Requirements.

Sour Gas Service Capability

Optional materials are available for applications handling sour
gases. These constructions comply with the recommendations
of NACE International Standards MR0175-2002 and MR0103.
Optional materials are available to meet ANSI/NACE
MR0175/ISO 15156.

Installation

WARNING

!

Only qualified personnel shall install or service
a regulator. Regulators should be installed,

operated and maintained in accordance with

international and applicable codes and regulations
and Emerson Process Management Regulator
Technologies, Inc. instructions.

If the regulator vents fluid or a leak develops in the
system, it indicates that service is required. Failure
to take the regulator out of service immediately
may create a hazardous condition.

Personal injury, equipment damage or leakage
due to escaping fluid or bursting of pressure
containing parts may result if this regulator
is overpressured or is installed where service
conditions could exceed the limits given in
the Specifications section or where conditions
exceed any ratings of the adjacent piping or
piping connections.

1. The pressure/temperature limits in this Installation Guide 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.

MR95 Series

Table 1. Outlet and Differential Pressure Ranges

TYPE

DN In. bar psi/psig

BODY SIZE OUTLET OR DIFFERENTIAL PRESSURE RANGE

0.14 to 0.41 2 to 6

MR95L and MR95LD 15, 20 and 25 1/4 NPT, 1/2, 3/4 and 1

0.34 to 1.0 5 to 15

0.90 to 2.1 13 to 30

1.0 to 2.1 15 to 30

15, 20 and 25 1/4 NPT, 1/2, 3/4 and 1

1.7 to 5.2 25 to 75

4.8 to 10.3 70 to 150

0.34 to 5.5 5 to 80

MR95H, MR95HD and MR95HDP

40 and 50 1-1/2 and 2

4.1 to 8.3 60 to 120

6.9 to 9.7 100 to 140

8.3 to 10.3 120 to 150

0.34 to 4.1 5 to 60

3.4 to 8.3 50 to 120

MR95HT

15, 20 and 25 1/4 NPT, 1/2, 3/4 and 1

40 and 50 1-1/2 and 2

15, 20 and 25 1/4 NPT, 1/2, 3/4 and 1

MR95HP

40 and 50 1-1/2 and 2

1. For Types MR95LD, MR95HD and MR95HDP 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.

Table 2. Maximum Cold Working Pressures of Body Size and Material

MAXIMUM INLET

TYPE BODY SIZE BODY MATERIALS

MR95L/

MR95LD

MR95H/

MR95HD

MR95HDP All available sizes

MR95HP All available sizes

MR95HT

1. The pressure/temperature limits in this Installation Guide 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. Not available for 1/4 NPT body size.

All available sizes

All available sizes

1/4 NPT and DN 15 to 25 /

1/2 to 1 in.

DN 40 and 50 /

1-1/2 and 2 in.

WCC/LCC Steel; CF8M/CF3M Stainless Steel;

WCC/LCC Steel; CF8M/CF3M Stainless Steel;

Monel

CF8M/CF3M Stainless Steel; Monel

CF8M/CF3M Stainless Steel; Monel

CF8M/CF3M Stainless Steel; Monel

WCC/LCC Steel; CF8M/CF3M Stainless Steel;

Monel

Gray Cast Iron 17.2 250 3.4 50 3.4 50

Monel

®(3)

; Hastelloy® C

(3)

Gray Cast Iron 17.2 250 17.2 250 17.2 250

®(3)

; Hastelloy® C

Hastelloy® C

Hastelloy® C

Hastelloy® C

®

; Hastelloy® C; Aluminum-Bronze

(3)

; Aluminum-Bronze

WCC/LCC Steel 41.4 600 41.4 600 41.4 600

(3)

; Aluminum-Bronze

WCC/LCC Steel 68.9 1000 41.4 600 41.4 600

(3)

; Aluminum-Bronze

WCC/LCC Steel 41.4 600 41.4 600 41.4 600

(3)

; Aluminum-Bronze

(3)

®(3)

;

(3)

®(3)

;

(3)

®(3)

;

(3)

PRESSURE

bar psig bar psig bar psig

20.7 300 8.6 125 8.6 125

20.7 300 20.7 300 20.7 300

41.4 600 37.9 550 37.9 550

68.9 1000 37.9 550 37.9 550

41.4 600 37.9 550 37.9 550

41.4 600 31.0 450 31.0 450

Table 3. MR95 Series Temperature Capabilities

TRIM MATERIAL SEAT DIAPHRAGM O-RING

Nitrile (NBR)

Neoprene (CR)

Fluorocarbon (FKM)

(3)

Ethylenepropylene (EPDM)

Peruoroelastomer (FFKM)

PTFE

Metal

 



  

  
 
 
 

Composition

Graphite

DIAPHRAGM
PROTECTOR

GASKET





1.0 to 6.9 15 to 100

5.5 to 20.7 80 to 300

1.0 to 6.9 15 to 100

4.1 to 17.9 60 to 260

1.0 to 6.9 15 to 100

5.5 to 27.6 80 to 400

1.0 to 6.9 15 to 100

4.1 to 20.7 60 to 300

(1)(2)

MAXIMUM OUTLET

(1)(2)

PRESSURE

MAXIMUM SPRING

CASE PRESSURE

TEMPERATURE

°C °F

-40 to 82 -40 to 180

-40 to 82 -40 to 180

-18 to 149,

Limited to 93°C for hot water

Limited to 200°F for hot water

-7 to 135 20 to 275

-18 to 218 0 to 425

-40 to 204 -40 to 400

-40 to 343 -40 to 650

-40 to 204,

Limited to 149°C for steam

Limited to 300°F for steam

-40 to 343 -40 to 650

(1)

0 to 300,

-40 to 400,

BODY MATERIAL

Stainless steel

Gray cast iron -29 to 208 -20 to 406

WCC Steel

(4)

(4)

LCC Steel

(4)

, Monel® or Hastelloy® C -40 to 288 -40 to 550

-29 to 343 -20 to 650

-40 to 343 -40 to 650

TEMPERATURE

°C °F

Aluminum-Bronze -40 to 260 -40 to 500

1. The pressure/temperature limits in this Installation Guide and any applicable standard limitation should not be exceeded.

2. The temperature limits given are based on the body size and body materials only. Actual temperature limits of the assembled regulator may decrease and vary depending on the body end
connection, diaphragm, seat and/or trim material of the regulator.

3. Not for use on steam service.

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

MR95 Series

To avoid such injury or damage, provide
pressure-relieving or pressure-limiting devices
(as required by the appropriate code, regulation
or standard) to prevent service conditions from
exceeding limits.

Additionally, physical damage to the regulator
could result in personal injury and property
damage due to escaping fluid. To avoid such
injury and damage, install the regulator in a
safe location.

Clean out all pipelines before installation of the regulator and check
to be sure the regulator has not been damaged or has collected
foreign material during shipping. For NPT bodies, apply pipe
compound to the external pipe threads. For flanged bodies, use
suitable line gaskets and approved piping and bolting practices.
Install the regulator in any position desired, unless otherwise
specified, but be sure flow through the body is in the direction
indicated by the arrow on the body.

Note

It is important that the regulator be installed
so that the vent hole in the spring case
is unobstructed at all times. For outdoor
installations, the regulator should be located away
from vehicular traffic and positioned so that water,
ice and other foreign materials cannot enter the
spring case through the vent. Avoid placing the
regulator beneath eaves or downspouts and be
sure it is above the probable snow level.

Overpressure Protection

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. Overpressure protection should also be
provided if the regulator inlet pressure is greater than the safe
working pressure of the downstream equipment.

Regulator operation below the maximum pressure limitations does
not preclude the possibility of damage from external sources or
debris in the line. The regulator should be inspected for damage
after any overpressure condition.

Startup

The regulator is factory set at approximately the midpoint of the
spring range or the pressure requested, so an initial adjustment
may be required to give the desired results. With proper installation
completed and relief valves properly adjusted, slowly open the
upstream and downstream shutoff valves.

Adjustment

To change the outlet pressure, loosen the jam nut and turn
the adjusting screw clockwise to increase outlet pressure or
counterclockwise to decrease it. Monitor the outlet pressure with a
test gauge during the adjustment. Tighten the jam nut to maintain
the desired setting.

Taking Out of Service (Shutdown)

WARNING

!

To avoid personal injury resulting from sudden
release of pressure, isolate the regulator from all
pressure before attempting disassembly.

Parts List

Key Description

1 Body
2 Spring Case
3* Orifice
4* Valve Plug, Metal seat
4* Disk Holder Assembly, Composition seat
4a Disk Holder
4b Disk
4c O-ring, Type MR95HP only (not shown)
5 Valve Plug Guide
6 Stem/Stem Assembly
6a Stem
6b Pusher Plate
6b O-ring
6c O-ring
7 Stem Guide Bushing
8 Lower Spring Seat
9 Upper Spring Seat
10 Pusher Post, (not shown)
11 Control Spring
12* Diaphragm
13 Nameplate
14* Diaphragm Protector (not shown)
15 Adjusting Screw
16 Cap Screw
17 Jam Nut
18 Nameplate Drive Screw
19* Diaphragm Gasket
20 Pitot Tube (for constructions without control line)
21 Diaphragm Head Assembly,Types MR95L and MR95LD only

(not shown)
21a Diaphragm Head
21b Lower Spring Seat
21c Screw
21 Diaphragm Head (not shown)
22 Adjusting Screw Assembly (Tee Handle Adjustment)
23 Handwheel (not shown)
26 Inner Valve Spring
27 Inner Valve Base (not shown)
27 Inner Valve Base Assembly, Type MR95HP only (not shown)
29* Gasket (not shown)
31 Locknut (not shown)
32 Stuffing Box
33 Adjusting Screw
34 Packing Follower
35 Stuffing Box Nut
36 Packing
37* Stuff Box Gasket
38 Handwheel/Handle
39 Internal Adaptor
40 External Adaptor
41 Machine Screw
41 Jam Nut, Types MR95HD and MR95HDP only
42 Spring
43 Washer
44 Washer
45* O-ring, Types MR95HD and MR95HDP only (not shown)
47 NACE Tag (not shown)
48 Tag Wire (not shown)
49 Lockwasher (not shown)
50* Sealing Washer
51 Vent, Type Y602-12 (not shown)
52 Plug
62 Adaptor, Types MR95L and MR95LD only (not shown)
63* Bottom Plug Seal
64 Flow Arrow
65 Pipe Plug (not shown)
66 Inlet Pressure Gauge (not shown)
67 Outlet Pressure Gauge (not shown)
69 ATEX Tag (not shown)
70 PED Tag (not shown)

*Recommended Spare Part

1. Only one metal diaphragm is needed for Types MR95L and MR95LD with 1/4 NPT body

size and 0.14 to 0.41 bar / 2 to 6 psi spring range.

(1)

3

MR95 Series

50

L2

L2

OR

L1

L4

15

2

11

21B

(2)

16

7

4

26

(3)

63

13

6

18

17

9 L2

21C

21A

3

5

SEALED ADJUSTING

SCREW OPTION

T

12

TEE-HANDLE OPTION

1

20

L2

L2

COMPOSITE SEAT OPTION

6B

52

6C

22

4B

4A

L1

L2

L2

L3 36

43

L1

11

L2

7

L1

OR

L4

6A

CONTROL LINE OPTION

12

64

GF04915

APPLY LUBRICANT OR SEALANT
T = THREAD LOCKER
L1 = GENERAL PURPOSE PTFE OR LITHIUM GREASE
L2 = ANTI-SEIZE COMPOUND
L4 = GRAPHITE SEALANT

1. Lubricants and sealants must be selected such that they meet the temperature requirements.

2. Apply L2 (anti-seize compound) on key 16 for Stainless steel bolts.

3. Apply L4 (graphite sealant) instead of L1 (general purpose PTFE or lithium grease) on key 63 for graphite ring.

18

METAL DIAPHRAGM OPTION

(1)

:

19

GF04918

41

33

44

38

34

35

32

37

42

2

(2)

16

39

40

9

L2

8

12

1

4

26

(3)

63

4B

4A

20

METAL DIAPHRAGM OPTION

6

L2

3

L2

5

6B

6A

CONTROL LINE OPTIONCOMPOSITION SEAT OPTION

APPLY LUBRICANT

L1 = GENERAL PURPOSE PTFE OR LITHIUM GREASE

L2 = ANTI-SEIZE COMPOUND
L4 = GRAPHITE SEALANT

(1)

:

19

12

52

L1

6C

Figure 1. Type MR95L, 1/4 NPT and DN 15 to 25 /

1/2 to 1 In. Body Sizes Assembly

[e-mail]

Fisher.com

Emerson Automation Solutions

Americas
McKinney, Texas 75070 USA
T [phone]

[phone]

Europe
Bologna 40013, Italy
T [phone]

For further information on the current
PED revision see Bulletin: D103053X012
or scan the QR code.

The distinctive diamond shape cast into every spring
case uniquely identifies the regulator as part of the
Fisher™ brand and assures you of the highest-quality
engineering, durability, performance, and support.

Facebook.com/EmersonAutomationSolutions

LinkedIn.com/company/emerson-automation-solutions

Twitter.com/emr_automation

Asia Pacic

Singapore 128461, Singapore
T [phone]

Middle East and Africa

Dubai, United Arab Emirates
T [phone]

Figure 2. Types MR95HD and MR95HDP,

1/4 NPT and DN 15 to 50 / 1/2 to 2 In. Body Sizes Assembly

D103587X014 © 2014, 2019 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 01/19.
The Emerson logo is a trademark and service mark of Emerson
Electric Co. All other marks are the property of their prospective owners.
Fisher™ is a mark owned by Fisher Controls International LLC, a
business of Emerson Automation Solutions.

The contents of this publication are presented for information purposes
only, and while effort has been made to ensure their accuracy, they are
not to be construed as warranties or guarantees, express or implied,
regarding the products or services described herein or their use or
applicability. All sales are governed by our terms and conditions, which
are available on request. We reserve the right to modify or improve the

designs or specications of our products at any time without notice.

Emerson Process Management Regulator Technologies, Inc does not
assume responsibility for the selection, use or maintenance of any
product. Responsibility for proper selection, use and maintenance of any
Emerson Process Management Regulator Technologies, Inc. product
remains solely with the purchaser.