Emerson MR98 Series User manual

Installation Guide

D104615X014

April 2022

MR98 Series AD2000 Compliant

D-A-CH Region Only

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.emerson.

com. For further information, refer to MR98 Series

Backpressure Regulators and Relief valves Instruction

Manual, D104615X012 (D.A.CH. Region Only).

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 (D.A.CH. Region Only).

Specifications

Available Constructions

Type MR98H: Backpressure regulator/relief valve

for spring settings range from 0.34 to 13.8 bar /

5 to 200 psig.

Type MR98HH: Backpressure regulator/relief

valve for spring settings range from 10.3 to

25.9 bar / 150 to 375 psig.

Body and Orifice Sizes

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:

29 mm / 1.142 in. orifice

End Connection Styles

G Thread and Integral PN 16/25/40 RF; all

flanged sizes are fabricated with a 356 mm / 14 in.

face-to-face dimension.

Set Pressure Ranges(1)

See Table 1

Maximum Cold Working Pressures of Body Size

and Materials(1)(6)

See Table 2

Maximum Inlet, Outlet and Spring Case

Pressure Ratings(1)

See Table 2

Temperature Capabilities of Body Materials(1)(2)

Temperature Capabilities of Trim Materials(1)(2)

Flow Coefficients

IEC Sizing Coefficients

Pressure Registration

Internal or External

Shutoff Classification Per ANSI/FCI 70-3-2004

Metal Seats: Class IV

PTFE: Class IV

Elastomer Seats: Class IV or better

TYPE PRODUCT SIZE BODY

MATERIAL CATEGORY

MR98H/

MR98HH

DN 15 to 25 /

1/2 to 1 in. Stainless steel SEP

MR98H DN 40 and 50 /

1-1/2 and 2 in. Stainless steel II

BODY MATERIAL TEMPERATURE RANGE

Stainless steel(4) -40 to 232°C / -40 to 450°F

TRIM MATERIAL

PART TEMPERATURE RANGE

Seat

Diaphragm

O-ring

Diaphragm

Protector

°C °F

Nitrile (NBR)   -40 to 82 -40 to 180

Neoprene (CR) -40 to 82 -40 to 180

Fluorocarbon (FKM)(3)  -18 to 149(5) 0 to 300(5)

Ethylenepropylene

(EPDM)  -7 to 135 20 to 275

Peruoroelastomer

(FFKM)   -18 to 218 0 to 425

Polytetrauoroethylene

(PTFE) -40 to 204 -40 to 400

Metal   -40 to 450 -40 to 232

BODY SIZE CVCgC1

DN In.

15 1/2 3.4 120 35.3

20 and 25 3/4 and 1 6.5 250 38.5

40 and 50 1-1/2 and 2 20.0 780 39.0

BODY SIZE XTFdFLKm

DN In.

15 1/2 0.787 0.78 0.94 0.88

20 and 25 3/4 and 1 0.935 0.70 0.91 0.83

40 and 50 1-1/2 and 2 0.961 0.69 0.94 0.88

1. The pressure/temperature limits in this Installation Guide 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. Not for use on steam service.

4. Meets API 614 Requirements (with stainless steel trim).

5. Limited to 93°C / 200°F for hot water.

6. Temperature, trim material and/or the body end connection may decrease these maximum pressures.

MR98 Series AD2000 Compliant

D-A-CH Region Only

Table 1. MR98 Series Body Sizes and Pressure Ranges

TYPE BODY SIZE CONTROL PRESSURE RANGE(1)

DN In. bar psig

MR98H

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

1.0 to 2.4 15 to 35

1.7 to 5.2 25 to 75

4.8 to 9.7 70 to 140

9.0 to 13.8 130 to 200

40 and 50 1-1/2 and 2

0.34 to 2.4 5 to 35

1.4 to 4.5 20 to 65

3.4 to 6.9 50 to 100

5.2 to 11.7 75 to 170

MR98HH 15 1/2 10.3 to 25.9 150 to 375

20 and 25 3/4 and 1 10.3 to 23.1 150 to 335

1. All springs may be backed o󰀨 to 0 bar / 0 psig. However, highest capacities and best performances are obtained by using these springs in their recommended ranges.

Table 2. Maximum Cold Working Pressures of Body Size and Materials(1)(2)

REGULATOR

TYPE

BODY SIZE BODY AND SPRING

CASE MATERIAL

MAXIMUM INLET

PRESSURE(3)

MAXIMUM

OUTLET PRESSURE

MAXIMUM SPRING

CASE PRESSURE

DN In. bar psig bar psig bar psig

MR98H 15, 20, 25,

40, 50

1/2, 3/4, 1,

1-1/2, 2 Stainless Steel(4) 20.7 300 20.7 300 20.7 300

MR98HH 15 1/2 Stainless Steel(4) 27.6 400 27.6 400 27.6 400

20, 25 3/4, 1 23.4 340 23.4 340 23.4 340

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

2. Temperature, trim material and/or the body end connection may decrease these maximum pressures.

3. Maximum inlet pressure equals set pressure plus build-up.

4. Meets API 614 Requirements (with stainless steel trim).

MR98 Series AD2000 Compliant

D-A-CH Region Only

Installation

▲ WARNING

Only qualified personnel shall install or

service a relief valve or backpressure

regulator. Relief valve or backpressure

regulator should be installed, operated

and maintained in accordance with

international and applicable codes

and regulations and Emerson Process

Management Regulator Technologies,

Inc. instructions.

If using a relief valve or backpressure

regulator on a hazardous or flammable

fluid service, personal injury and

property damage could occur due to

fire or explosion of vented fluid that

may have accumulated. To prevent

such injury or damage, provide

piping or tubing to vent the fluid

to a safe, well- ventilated area or

containment vessel.

Also, when venting a hazardous fluid,

the piping or tubing should be located

far enough away from any buildings

or windows so to not create a further

hazard and the vent opening should be

protected against anything that could

clog it.

Personal injury, equipment damage

or leakage due to escaping fluid

or bursting of pressure-containing

parts may result if this relief valve or

backpressure 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.

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

relief valve or backpressure regulator

could result in personal injury and

property damage due to escaping fluid.

To avoid such injury and damage,

install the relief valve or backpressure

regulator in a safe location.

Clean out all pipelines before installation of the relief

valve or backpressure regulator and check to be

sure the relief valve or backpressure has not been

damaged or has collected foreign material during

shipping. For G bodies, apply pipe compound to

the external pipe threads. For flanged bodies, use

suitable line gaskets and approved piping and bolting

practices. Install the relief valve or backpressure

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 relief valve or

backpressure regulator be installed

so that the vent hole in the spring

case is unobstructed at all times. For

outdoor installations, the relief valve

or backpressure 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

relief valve or backpressure regulator

beneath eaves or downspouts and be

sure it is above the probable snow level.

Overpressure Protection

Maximum inlet pressure depends upon body material

and temperatures. See Specifications section or the

maximum inlet pressure of the valve. The valve should

be inspected for damage after any overpressure

condition. Fisher™ relief valve or backpressure

regulators are NOT ASME safety relief valves.

MR98 Series AD2000 Compliant

D-A-CH Region Only

Startup

The relief valve or backpressure 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 (if applicable).

Adjustment

To change the control pressure, remove closing

cap or loosen the jam nut and turn the adjusting

screw clockwise to increase control pressure or

counterclockwise to decrease pressure. Monitor

the control pressure with a test gauge during the

adjustment. Replace closing cap or 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* Orice

4* Valve Plug

5 Bottom Plug

7 Valve Plug Guide

8 Lower Spring Seat

9 Upper Spring Seat

10 Pusher Post

11 Control Spring

12* Diaphragm (2 required for metal, Fluorocarbon (FKM) and

Ethylenepropylene (EPDM) diaphragms)

13 Nameplate

14 Diaphragm Protector (not shown)

15 Adjusting Screw

16 Cap Screws

Types MR98H, MR98HH:

DN 15 to 50 / 1/2 to 2 in. bodies - 8 required

17 Jam Nut

18 Drive Screw (4 required)

19* Diaphragm Gasket (2 required for pressure loaded spring case)

24 Machine Screw

25 O-ring Retainer

25 Seat Retainer

28 Lockwasher

29* Gasket

31 Locknut

45* O-ring

47 NACE Tag (not shown)

48 Tag Wire (not shown)

52 Plug

53* Valve Plug O-ring

57 Jam Nut (not shown)

58 Washer

59* O-ring

59* L-ring

62 Adaptor (not shown)

63* Bottom Plug Seal

64 Flow Arrow

65 Pipe Plug (not shown)

66 Pressure Gauge (not shown)

68 Restriction (not shown)

69 ATEX Tag (not shown)

70 PED Tag (not shown)

*Recommended spare part

MR98 Series AD2000 Compliant

24T

53 L1

9 L2

7 L2

3 L2

5 L2

15L2

10L2

L2(2)

GF04916

D-A-CH Region Only

Figure 1. Type MR95H Assembly

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.

Note: Use key 69 or 71 only when specied.

APPLY(1):

T = THREAD LOCKER

L1 = GENERAL PURPOSE PTFE OR LITHIUM GREASE FOR O-RINGS

L2 = ANTI - SEIZE COMPOUND

L4 = GRAPHITE SEALANT FOR GRAPHITE RING

NAMEPLATE AND FLOW ARROW

METAL DIAPHRAGM OPTION

COMPOSITE SEAT OPTION

CONTROL LINE OPTION

SEALED ADJUSTING

SCREW OPTION

OR(3)

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[email protected]

Emerson Automation Solutions

MR98 Series AD2000 Compliant

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.

Fisher.com

Americas

McKinney, Texas 75070 USA

T +1 800 558 5853

+1 972 548 3574

Europe

Bologna 40013, Italy

T +39 051 419 0611

Katzbergstr. 1

D-40764 Langenfeld

Deutschland

T +49-2173-3348-0

Asia Pacic

Singapore 128461, Singapore

T +65 6777 8211

Middle East and Africa

Dubai, United Arab Emirates

T +971 4 811 8100

D-A-CH Region Only

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 informational purposes

only, and while every e󰀨ort 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 upon request. We reserve the right to modify or

improve the designs or specications of such 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.

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