Emerson MR105 Installation Guide
Installation Guide
English – June 2014
Type MR105
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
Low-Pressure Actuator: 400 psig / 27.6 bar
High-Pressure Actuator: 400 psig / 27.6 bar
Maximum Outlet Pressures
Low-Pressure Actuator: 70 psig / 4.8 bar
High-Pressure Actuator: 400 psig
(1)
(1)
(2)
/ 27.6 bar
Maximum Emergency Casing Pressures
(1)
Low-Pressure Actuator: 70 psig / 4.8 bar
High-Pressure Actuator: 400 psig
Maximum Setpoint
(1)
(2)
/ 27.6 bar
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
4.1 bar; 43 to 100 psig / 3.0 to 6.9 bar; 75 to 175 psig
5.2 to 12.1 bar; 110 to 300 psig
(4)
(3)
/ 1.7 to
/ 7.6 to 20.7 bar
(4)
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
Ethylene Propylene (EPDM): -20 to 225°F /
-29 to 107°C
(6)
Maximum Differential Pressures
(5)
/ -7 to 121°C
(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.
www.sherregulators.com
D103246XUS2
Type MR105
Installation
WARNING
!
Only qualied personnel should install
or service a regulator. Regulators should
be installed, operated and maintained
in accordance with international and
applicable codes and regulations and
Emerson Process Management Regulator
Technologies, Inc. instructions.
If the regulator vents uid or a leak
develops in the system, it indicates that
service is required. Failure to take the
regulator out of service immediately may
create a hazardous condition.
Personal injury, equipment damage or
leakage due to escaping uid or bursting of
pressure-containing parts may result if this
regulator is overpressured or is installed
where service conditions could exceed the
limits given in the Specications section or
where conditions exceed any ratings of the
adjacent piping or piping connections.
To avoid such injury or damage, provide
pressure-relieving or pressure-limiting
devices (as required by the appropriate
code, regulation or standard) to prevent
service conditions from exceeding limits.
Additionally, physical damage to the
regulator could result in personal injury
and property damage due to escaping uid.
To avoid such injury and damage, install
the regulator in a safe location.
Clean out all pipelines before installation of the regulator
and check to be sure the regulator has not been damaged
or has collected foreign material during shipping. For
NPT bodies, apply pipe compound to the external pipe
threads. For anged bodies, use suitable line gaskets and
approved piping and bolting practices.
Vertical installation with the actuator oriented up or down
is recommended. The unit will operate in horizontal
installation with actuator on the side, however, this could
result in premature wear of parts. Make sure that ow will
be in the same direction as that indicated by the body
arrow. Orientation of the two vents should always be down.
Vents may be rotated after regulator installation so that the
vent screens are down.
A control line must be installed to allow outlet pressure to
register on the actuator’s diaphragm. It should be installed
four to eight pipe diameters downstream of the regulator
and in an area of pipe that is free of turbulence.
Note
It is important that the regulator be installed
so that the vent hole in the spring case
is unobstructed at all times. For outdoor
installations, the regulator should be
located away from vehicular trafc and
positioned so that water, ice and other
foreign materials cannot enter the spring
case through the vent. Avoid placing the
regulator beneath eaves or downspouts and
be sure it is above the probable snow level.
Overpressure Protection
The recommended pressure limitations are stamped
on the regulator nameplate. Some type of overpressure
protection is needed if the actual inlet pressure exceeds the
maximum operating outlet pressure rating. Overpressure
protection should also be provided if the regulator inlet
pressure is greater than the safe working pressure of the
downstream equipment.
Regulator operation below the maximum pressure
limitations does not preclude the possibility of damage
from external sources or debris in the line. The
regulator should be inspected for damage after any
overpressure condition.
Startup
The regulator is set at the factory for the setpoint specied
on the order or at the midpoint of the spring range. The
allowable spring range is stamped on the nameplate. If a
pressure setting other than specied is desired, be sure to
change the pressure setting by following the Adjustment
section. With proper installation completed and relief
valves properly adjusted, slowly open the upstream and
downstream shutoff valves (if applicable).
Adjustment
To change the outlet pressure, loosen the locknut and
turn the adjusting screw clockwise to increase pressure or
counterclockwise to decrease pressure. Monitor the outlet
pressure with a test gauge during the adjustment. Tighten the
locknut to maintain the desired setting.
Taking Out of Service (Shutdown)
WARNING
!
To avoid personal injury resulting from
sudden release of pressure, isolate
the regulator from all pressure before
attempting disassembly.
2
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