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.fisher.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 categories. 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
PRODUCT SIZE
CATEGORY
DN 25 / NPS 1
SEP
DN 50 / NPS 2
II
DN 80 / NPS 3
II
DN 100 / NPS 4
II
Specifications
Available Constructions
Type MR105 with low-pressure actuator:
Direct-operated
large multi-purpose regulator with 0.34 to 3.0 bar /
5 to 43 psig pressure range
Type MR105 with high-pressure actuator:
Direct-
operated large multi-purpose regulator with 1.7 to 20.7 bar /
25 to 300 psig 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 PN 16/25/40 RF
DN 80 and 100 / NPS 3 and 4:
CL125 FF, CL250 RF,
CL150 RF, CL300 RF, CL600 RF and PN 16 RF
Maximum Inlet Pressures
(1)
Low-Pressure Actuator:
27.6 bar / 400 psig
High-Pressure Actuator:
27.6 bar / 400 psig
Maximum Outlet Pressures
(1)
Low-Pressure Actuator:
4.8 bar / 70 psig
High-Pressure Actuator
(2)
:
27.6 bar / 400 psig
Maximum Emergency Casing Pressures
(1)
Low-Pressure Actuator:
4.8 bar / 70 psig
High-Pressure Actuator
(2)
:
27.6 bar / 400 psig
Maximum Setpoint
(1)
Low-Pressure Actuator:
3.0 bar / 43 psig
High-Pressure Actuator:
Nitrile (NBR) and Ethylene Propylene (EPDM) Diaphragm:
20.7 bar / 300 psig
Fluorocarbon (FKM) Diaphragm:
10.3 bar / 150 psig
Outlet Pressure Ranges
(1)
DN 25 and 50 / NPS 1 and 2:
Low-Pressure Actuator:
0.34 to 0.83 bar / 5 to 12 psig;
0.69 to 1.6 bar / 10 to 24 psig; 0.96 to 2.2 bar / 14 to 32 psig;
1.2 to 3.0 bar / 18 to 43 psig
High-Pressure Actuator:
1.7 to 4.1 bar / 25 to 60 psig
(3)
;
3.0 to 6.9 bar / 43 to 100 psig; 5.2 to 12.1 bar /
75 to 175 psig
(4)
; 7.6 to 20.7 bar / 110 to 300 psig
(4)
DN 80 and 100 / NPS 3 and 4:
Low-Pressure Actuator:
0.34 to 0.55 bar / 5 to 8 psig;
0.55 to 1.4 bar / 8 to 20 psig; 0.83 to 2.1 bar / 12 to 30 psig;
1.2 to 2.7 bar / 18 to 39 psig
High-Pressure Actuator:
2.7 to 5.0 bar / 39 to 72 psig;
4.9 to 12.1 bar / 71 to 175 psig
(4)
; 7.6 to 17.2 bar /
110 to 250 psig
(4)
Temperature Capabilities
(1)
Nitrile (NBR):
-29 to 82°C / -20 to 180°F
Fluorocarbon (FKM)
(5)
:
-7 to 121°C / 20 to 250°F
Ethylene Propylene (EPDM)
(6)
:
-29 to 107°C / -20 to 225°F
Maximum Differential Pressures
(1)
Liquid Application:
Low-Pressure Actuator:
DN 25 and 50 / NPS 1 and 2:
13.6 bar / 200 psig
DN 80 and 100 / NPS 3 and 4:
15.5 bar / 225 psig
High-Pressure Actuator:
DN 25 / NPS 1:
17.2 bar / 250 psig
DN 50 / NPS 2:
13.6 bar / 200 psig
DN 80 / NPS 3:
15.5 bar / 225 psig
DN 100 / NPS 4:
17.2 bar / 250 psig
Other Applications:
Low-Pressure Actuator:
27.6 bar / 400 psig or maximum
inlet pressure, whichever is lower
High-Pressure Actuator:
27.6 bar / 400 psig or maximum
inlet pressure, whichever is lower
Maximum Pressures over Set Pressure to Avoid Internal
Parts Damage
(1)
Low-Pressure Actuator:
1.4 bar / 20 psig
High-Pressure Actuator:
8.3 bar / 120 psig
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 15.8 bar / 230 psig or the body rating limit, whichever is lower.
3. DN 50 / NPS 2 body size spring range is limited up to 3.1 bar / 45 psig only.
4. Maximum setpoint is limited to 10.3 bar / 150 psig for constructions with Fluorocarbon (FKM) diaphragm.
5. Fluorocarbon (FKM) is limited to 93°C / 200°F hot water.
6. Ethylene Propylene (EPDM) is limited to -7 to 121°C / 20 to 250°F when used with Low Pressure Actuator.
Type MR105
Installation Guide
D103246X014
English - December 2014
