Data Sheet

Bulletin 71.1:MR105
2
Introduction
The Type MR105 regulators are direct-operated, pressure
reducing, high-capacity, multi-purpose regulators.
They are designed to handle pressures up to 400 psig /
27.6 bar and temperatures up to 250°F / 121°C.
This product provides a simple, fast, reliable and
economical way to control and reduce pressure in multi-
purpose applications suitable for different ow media
such as liquid, air and gas. Applications include lube oil
Specications
The Specications section on this page provides the ratings and other specications for the Type MR105. The
following information is stamped on the nameplate fastened on the regulator at the factory: type; body size;
maximum inlet, outlet and differential pressure; maximum pressure above setpoint; maximum casing pressure;
maximum temperature; spring range; cage type; and trim and diaphragm material.
Body Sizes and End Connection Styles
See Table 1
Shutoff Classication per ANSI/FCI 70-3-2004
Class VI (Soft Seat)
Maximum Inlet, Outlet and Emergency Casing
Pressure
(1)
See Table 3
Outlet Pressure Ranges
(1)
5 to 300 psig / 0.34 to 20.7 bar; see Table 2
Maximum Setpoint
(1)
Low-Pressure Actuator: 43 psig / 3.0 bar
High-Pressure Actuator:
Nitrile (NBR) and Ethylene Propylene (EPDM)
Diaphragm: 300 psig / 20.7 bar
Fluorocarbon (FKM) Diaphragm:
150 psig / 10.3 bar
Construction Materials
See Table 6
Maximum Differential Pressures
(1)
See Table 4
Flow and Sizing Coefcients
See Table 5
Temperature Capabilities
(1)
Nitrile (NBR): -20 to 180°F / -29 to 82°C
Fluorocarbon (FKM): 20 to 250°F / -7 to 121°C
(2)
Ethylene Propylene (EPDM)
(3)
: -20 to 225°F /
-29 to 107°C
Pressure Registration
External
Downstream Control Line Connection Size
1/2 NPT
Maximum Pressure Over Setpoint to Avoid Internal
Parts Damage
(1)
Low-Pressure Actuator: 20 psig / 1.4 bar
High-Pressure Actuator: 120 psig / 8.3 bar
Spring Case Vent
Type Y602-12
Pressure-Loaded Spring Case Vent Connection
1/2 NPT
Approximate Weights
For Type MR105 with Low-Pressure Actuator
NPS 1 / DN 25: 86 lbs / 39 kg
NPS 2 / DN 50: 116 lbs / 53 kg
NPS 3 / DN 80: 165 lbs / 75 kg
NPS 4 / DN 100: 174 lbs / 79 kg
For Type MR105 with High-Pressure Actuator
NPS 1 / DN 25: 76 lbs / 34 kg
NPS 2 / DN 50: 105 lbs / 48 kg
NPS 3 / DN 80: 155 lbs / 70 kg
NPS 4 / DN 100: 164 lbs / 74 kg
Options
• Visual Travel Indicator
• Drain Valve
• Pressure-Loaded Actuator
• NACE Construction
• Bleed Valve (for High-Pressure Actuator Only)
• Ethylene Propylene (EPDM) Elastomer
Trim Parts
1. The pressure/temperature limits in this Bulletin or any applicable standard limitation should not be exceeded.
2. Fluorocarbon (FKM) is limited to 200°F / 93°C in hot water.
3. Ethylene Propylene (EPDM) is limited to 20 to 250°F / -7 to 121°C when used with Low Pressure Actuator.
systems and any application where speed of response is
critical, minimum differential pressure is a concern or uid
is not free of impurities. Type MR105 regulator with a
low-pressure actuator can be set up to 43 psig / 3.0 bar
and the high-pressure actuator version can be set up
to 300 psig / 20.7 bar.
The units are available in 4 sizes, NPS 1 through 4 /
DN 25 through 100 and are available in several
end connection congurations to meet demands on
application requirements.