D103246XUS2
Installation Guide
English – June 2014
Type MR105
www.sherregulators.com
Introduction
This installation guide provides instructions for installation,
startup and adjustment. To receive a copy of the
instruction manual, contact your local Sales Ofce or
view a copy at www.sherregulators.com. For further
information refer to Type MR105 Instruction Manual,
Form 5874, D103246X012.
P.E.D. Category
This product may be used as a pressure accessory with
pressure equipment in the following Pressure Equipment
Directive 97/23/EC categories. It may also be used
outside of the Pressure Equipment Directive using sound
engineering practice (SEP) per table below.
PRODUCT SIZE CATEGORIES
NPS 1 / DN 25 SEP
NPS 2 / DN 50 II
NPS 3 / DN 80 II
NPS 4 / DN 100 II
Specications
Available Constructions
Type MR105 with low-pressure actuator: Direct-
operated large multi-purpose regulator with
5 to 43 psig / 0.35 to 3.0 bar pressure range.
Type MR105 with high-pressure actuator: Direct-
operated large multi-purpose regulator with
25 to 300 psig / 1.7 to 20.7 bar pressure range.
Body Sizes and End Connection Styles
DN 25 and 50 / NPS 1 and 2: NPT, CL125 FF,
CL250 RF, CL150 RF, CL300 RF, CL600 RF and
EN PN 16/25/40 RF
DN 80 and 100 / NPS 3 and 4: CL125 FF, CL250 RF,
CL150 RF, CL300 RF, CL600 RF and EN PN 16 RF
Maximum Inlet Pressures
(1)
Low-Pressure Actuator: 400 psig / 27.6 bar
High-Pressure Actuator: 400 psig / 27.6 bar
Maximum Outlet Pressures
(1)
Low-Pressure Actuator: 70 psig / 4.8 bar
High-Pressure Actuator: 400 psig
(2)
/ 27.6 bar
Maximum Emergency Casing Pressures
(1)
Low-Pressure Actuator: 70 psig / 4.8 bar
High-Pressure Actuator: 400 psig
(2)
/ 27.6 bar
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
Outlet Pressure Ranges
(1)
NPS 1 and 2 / DN 25 and 50:
Low-Pressure Actuator: 5 to 12 psig / 0.35 to 0.83 bar;
10 to 24 psig / 0.69 to 1.6 bar; 14 to 32 psig /
0.96 to 2.2 bar; 18 to 43 psig / 1.2 to 3.0 bar
High-Pressure Actuator: 25 to 60 psig
(3)
/ 1.7 to
4.1 bar; 43 to 100 psig / 3.0 to 6.9 bar; 75 to 175 psig
(4)
/
5.2 to 12.1 bar; 110 to 300 psig
(4)
/ 7.6 to 20.7 bar
NPS 3 and 4 / DN 80 and 100:
Low-Pressure Actuator: 5 to 8 psig / 0.35 to 0.55 bar;
8 to 20 psig / 0.55 to 1.4 bar; 12 to 30 psig / 0.83 to 2.1 bar;
18 to 39 psig / 1.2 to 2.7 bar
High-Pressure Actuator: 39 to 72 psig / 2.7 to 5.0 bar;
71 to 175 psig
(4)
/ 4.9 to 12.1 bar; 110 to 250 psig
(4)
/
7.6 to 17.2 bar
Temperature Capabilities
(1)
Nitrile (NBR): -20 to 180°F / -29 to 82°C
Fluorocarbon (FKM): 20 to 250°F
(5)
/ -7 to 121°C
Ethylene Propylene (EPDM): -20 to 225°F /
-29 to 107°C
(6)
Maximum Differential Pressures
(1)
Liquid Application:
Low-Pressure Actuator:
NPS 1 and 2 / DN 25 and 50: 200 psig / 13.8 bar
NPS 3 and 4 / DN 80 and 100: 225 psig / 15.5 bar
High-Pressure Actuator:
NPS 1 / DN 25: 250 psig / 17.2 bar
NPS 2 / DN 50: 200 psig / 13.8 bar
NPS 3 / DN 80: 225 psig / 15.5 bar
NPS 4 DN 100: 250 psig / 17.2 bar
Other Applications:
Low-Pressure Actuator: 400 psig / 27.6 bar
High-Pressure Actuator: 400 psig / 27.6 bar
Maximum Pressures over Set Pressure to Avoid
Internal Parts Damage
(1)
Low-Pressure Actuator: 20 psig / 1.4 bar
High-Pressure Actuator: 120 psig / 8.3 bar
1. The pressure/temperature limits in this Installation Guide or any applicable limitation should not be exceeded.
2. Maximum Outlet and Emergency Casing Pressures for constructions with Fluorocarbon (FKM) diaphragm are limited to 230 psig / 15.8 bar or the body rating limit, whichever is lower.
3. NPS 2 / DN 50 body size spring range is limited up to 45 psig / 3.1 bar only.
4. Maximum setpoint is limited to 150 psig / 10.3 bar for constructions with Fluorocarbon (FKM) diaphragm.
5. Fluorocarbon (FKM) is limited to 200°F / 93°C hot water.
6. Ethylene Propylene (EPDM) is limited to 20 to 250°F / -7 to 121°C when used with Low Pressure Actuator.
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