Product Description; Pressure Reducing Regulators; Differential Pressure Regulators - Fisher MR95L Instruction Manual

WARNING
!
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,
fire 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 unqualified
personnel may result in improper
adjustment and unsafe operation. Either
condition may result in equipment
damage or personal injury. Only a
qualified person shall install or service
the MR95 Series regulator.
Introduction
Scope of the Manual
This manual provides instructions for the installation,
adjustment, maintenance and parts ordering for
MR95 Series pressure regulators. These regulators
are usually shipped separately for line or panel
mounting or installed on other equipment. Instructions
and parts lists for other equipment are found in
separate manuals.

Product Description

MR95 Series regulators are suitable for steam, air,
gas, water, oil and similar fluids. Types MR95L,
MR95H, MR95HP and MR95HT are direct-operated
pressure reducing regulators for pressure control
requiring constant outlet pressures between
2 and 400 psig / 0.14 and 27.6 bar. Types MR95LD
Monel ® is a mark owned by Special Metals Corporation.
Hastelloy C is a mark owned by Haynes International, Inc.
®
and MR95HD are small-size, large-capacity,
differential pressure regulators. The differential
pressure range is from 2 to 150 psi / 0.14 to 10.3 bar.
Typical MR95 Series regulators are shown in Figure 1.

Pressure Reducing Regulators

Type MR95L—Pressure reducing regulator suitable
for controlling many gases and liquids. Gray Cast Iron,
Steel, Stainless steel, Hastelloy
are available. Outlet pressure range is from 2 to
30 psig / 0.14 to 2.1 bar with three different springs
available. Body sizes are available from 1/4 NPT and
1/2 through 1 in. / DN 15 through 25 with a variety
of end connections. The standard orifice sizes are
0.284, 0.416 and 0.631 in. / 7.22, 10.56 and 16.02 mm
diameter, dependent on body sizes.
Type MR95H—Basically the same as Type MR95L,
but permits higher outlet pressure ranges from
15 to 150 psig / 1.0 to 10.3 bar for the 1/4 NPT and
1/2, 3/4 and 1 in. / DN 15, 20 and 25 sizes. Also
available in 1-1/2 and 2 in. / DN 40 and 50 sizes with a
1.142 in. / 29 mm orifice to give outlet pressure ranges
from 5 to 150 psig / 0.34 to 10.3 bar.
Type MR95HP—Basically the same as Type MR95H,
but permits even higher outlet pressure ranges from
15 to 400 psig / 1.0 to 27.6 bar.
Type MR95HT—Basically the same as Type MR95H,
but permits higher outlet pressures at higher
temperatures. Outlet pressure ranges are available
from 15 to 300 psig / 1.0 to 20.7 bar and temperatures
up to 650°F / 343°C.

Differential Pressure Regulators

Type MR95LD—Small-size, large-capacity, differential
pressure regulators. Typical applications include use
on testing fixtures, wash tanks, sterilizers, steam
tables, fuel lines and plant air supplies. Gray Cast
Iron, Steel, Stainless steel, Hastelloy
bodies are available. Differential pressure range is
from 2 to 30 psi / 0.14 to 2.1 bar with three different
spring ranges.
Type MR95HD—Basically the same as Type MR95LD,
but permits higher differential pressure ranges from
5 to 150 psi / 0.34 to 10.3 bar with seven different
spring ranges.
MR95 Series
C and Monel bodies
® ®
C and Monel
® ®
3