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Bulletin 71.1:MR95

Introduction

The MR95 Series regulators are compact, large-capacity,

direct-operated pressure regulators (see Figure 1). The units

are available in 1/4 NPT through 2 in. / DN 50 sizes and are

offered in several different end connection congurations.

They are designed to handle pressures up to 1000 psig /

68.9 bar and temperatures up to 650°F / 343°C.

These products can help solve the toughest pressure control

applications. Typical applications include superheated steam,

steam injection, steam tracing, nitrogen purging, boiler feed

water, process chemicals, cooling water, test xtures, wash

tanks, sterilizers/autoclaves, fuel lines, pneumatic supply and

many others.

Features

• Handwheels/Tee Handles—Allow easy pressure

setting changes and are standard on Types MR95LD

and MR95HD, and optional on the Types MR95L,

MR95H, MR95HP and MR95HT regulators.

• Versatile—Can be used with all process media

including air, steam, gas, water, liquids (oils and

process chemicals) and oxygen.

• Tight Shutoff With Elastomer Seats—Metal seats

available for high temperatures.

• Direct-Operated—Design maximizes speed

of response.

• Robust—Up to 1000 psig / 68.9 bar inlet pressure.

• P

= P

—Inlet equals outlet rating in Types MR95H and

MR95HD up to 300 psig / 20.7 bar.

• Rugged Construction—Available in a variety of body

and spring case materials to address the toughest service

conditions. Severe service elastomers and corrosion

resistant trims are also available and provide excellent

uid compatibility.

Specications (continued)

Main Valve Construction Materials

See Table 8

Trim Materials

See Table 7

Product Dimension

See Figure 3

Common Services and Material Compatibility

See Table 9

• Differential Pressure Capability—Spring-loaded

Polytetrauoroethylene (PTFE) packing and

tapped connections permit pressure loading of the

Types MR95LD and MR95HD spring cases.

• Special Service Capabilities—Optional materials

are available for applications handling sour gases,

cryogenics and superheated steam.

• Large Turndown Ratio—No need for low C

trims at

low ows.

• Graphite Gaskets—For high temperature applications

up to 650°F / 343°C (optional).

• Set Pressures up to 400 psig / 27.6 bar

• Multiple End Connection Options—To match

your application.

• Easy Maintenance—Seating parts are easily accessible

by removing the plug on the bottom of the regulator.

• API 614 Compliant—Steel and Stainless steel

constructions meet API 614 requirements.

Principle of Operation

The MR95 Series (refer to Figure 2) is a direct-operated

regulator. Downstream pressure is registered internally

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 orice,

restricting uid 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 orice. This allows uid ow through the body to

the downstream system. Types MR95H, MR95L, MR95HP

and MR95HT use spring force to regulate outlet pressure.

Types MR95HD and MR95LD use spring force to maintain

a differential pressure between spring case loading

pressure and outlet pressure.

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 bodies:

22 lbs / 10 kg

1-1/2 and 2 in. / DN 40 and 50 bodies:

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 bodies:

35 lbs / 16 kg

1 2 3 4 5 6 7 8 ... 31 32

Bulletin 71.1:MR95 1

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