Installation Guide
English – September 2009
Types 161 and 161M
Introduction
This installation guide provides instructions for
installation, startup, and adjustment of the Types 161
and 161M pilot regulators.
P.E.D. Categories
This product may be used as a safety 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
1/4 NPT SEP
Specications
Maximum Inlet Pressures
Aluminum Body: 27,6 bar (400 psig)
Stainless Steel Body: 103 bar (1500 psig)
Maximum Outlet Pressures
Aluminum Body: 22,7 bar (330 psig)
Stainless Steel Body: 51,7 bar (750 psig)
Outlet Pressure Ranges
0,3 to 1,0 bar (5 to 15 psig),
0,7 to 8,6 bar (10 to 125 psig),
8,3 to 20,7 bar (120 to 300 psig), and
17,2 to 41,4 bar (250 to 600 psig)
Temperature Capabilities
Nitrile (NBR)/Neoprene (CR): -40° to 66°C
(-40° to 150°F)
Fluorocarbon (FKM): -18° to 149°C (0° to 300°F)
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Installation
WARNING
!
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 pressurelimiting 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. Install the regulator
in any position desired, unless otherwise specied,
but be sure ow through the body is in the direction
indicated by the arrow on the body.
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
1. The pressure/temperature limits in this installation guide and any applicable standard or code limitation should not be exceeded.
2. Type 161M monitor pilot maximum outlet pressure is 103 bar (1500 psig).
3. 17,2 to 41,4 bar (250 to 600 psig) outlet pressure range is only available for stainless steel bodies.
www.emersonprocess.com/regulators
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
Note
D103084XUS2
2
Types 161 and 161M
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 factory set at approximately
the midpoint of the spring range or the pressure
requested, so an initial adjustment may be
required to give the desired results. With
proper installation completed and relief valves
properly adjusted, slowly open the upstream and
downstream shutoff valves.
Adjustment
To change the outlet pressure, remove the closing
cap or loosen the locknut and turn the adjusting
screw clockwise to increase outlet pressure or
counterclockwise to decrease pressure. Monitor
the outlet pressure with a test gauge during the
adjustment. Replace the closing cap or 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.
Parts List
Key Description
1 Body Assembly
2 Spring Case
3 Body Plug
4 Valve Plug
7 Diaphragm Assembly
8 Upper Spring Seat
9 Spring
10 Diaphragm Limiter
11 Adjusting Screw
13 Machine Screw
14 Pipe Plug (Type 161 Only)
15 O-ring
16 Closing Cap
17 Gasket
18 Vent
19 Solid Stem Guide Assembly
22 O-ring
23 O-ring
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