Installation Guide
English – May 2002
61 Series
Introduction
This installation guide provides instructions for installation,
startup, and adjustment. For further information refer to:
Type 1098-EGR Instruction Manual, form 5084,
D100339X012, or Type 99 Instruction Manual, form 589,
D100260X012, or www.FISHERregulators.com.
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.
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Specifications
Available Configurations
61L:
Low pressure pilot for 0,02 to 1,38 bar (0.25 to
20 psig set points
61LD:
Low pressure, narrow proportional band pilot
for 0,02 to 1,38 bar (0.25 to 20 psig)
61LE:
Low pressure, wide proportional band pilot for
0,02 to 1,38 bar (0.25 to 20 psig)
61H:
high pressure pilot for set pressures from 0,69
to 4,48 bar (10 to 65 psig)
61HP:
high pressure pilot for set pressures from
1,03 to 20,7 bar (15 to 300 psig)
Maximum Inlet Pressure
61L, 61LE, 61H:
61LD:
11 bar (160 psig)
61HP:
41,4 bar (600 psig)
20,7 bar (300 psig)
Outlet Pressure Ranges
61L, 61LD, 61LE:
0,07 to 0,35 bar (1 to 5 psig); 0,14 to 0,69 bar (2 to 10
psig); 0,35 to 1,03 bar (5 to 15 psig); 0,69 to 1,38 bar
(10 to 20 psig)
61H:
0,69 to 4,48 bar (10 to 65 psig)
61HP:
1,03 to 3,10 bar (15 to 45 psig); 2,41 to 6,90 bar
(35 to 100 psig); 6,90 to 20,68 bar (100 to 300 psig)
Maximum Spring Case Pressure for Pressure
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(1)
61L, 61LD, 61LE:
61H:
5,0 bar (72 psig)
61HP:
6,9 bar (100 psig)
Proof Test Pressure
All Pressure Retaining Components have been
proof tested per Directive 97/23/EC - Annex 1,
Section 7.4
(1)
(1)
0,02 to 0,14 bar (0.25 to 2 psig);
1,7 bar (25 psig)
Temperature Capabilities
Nitrile/Neoprene:
Fluoroelastomer:
limited to 82°C (180°F)
-40 to 82°C (-40 to 180°F)
-18 to 149°C (0 to 300°F) hot water
Installation
Only qualified personnel should install or service
a regulator. Regulators should be installed,
operated, and maintained in accordance with
international and applicable codes and
regulations, and Fisher instructions.
If the regulator vents fluid 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 fluid or bursting of pressurecontaining parts may result if this regulator is
overpressured or is installed where service
conditions could exceed the limits given in the
Specifications section, or where conditions
exceed any ratings of the adjacent piping or piping
connections.
To avoid such injury or damage, provide pressurerelieving 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 fluid. 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 male pipe threads. For
flanged bodies, use suitable line gaskets and approved
piping and bolting practices. Install the regulator in any
position desired, unless otherwise specified, but be sure
flow through the body is in the direction indicated by the
arrow on the body.
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 traffic 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.
1. The pressure/temperature limits in this installation guide and any applicable
standard or code limitation should not be exceeded.
www.FISHERregulators.com
D400018XENG
61 Series
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)
To avoid personal injury resulting from sudden
release of pressure, isolate the regulator from all
pressure before attempting disassembly.
Parts List
Key Description
1 Relay Spring Case
2 Relay Valve Body
3 Bottom Cover
4 Relay Yoke
5 Closing Cap Assembly
6 Adjusting Screw
7 Control Spring
8 Relay Orifice
9 Disc Holder Assembly
10 Bleed Orifice
11 Diaphragm Nut
12 O-ring Seal
13 Relay Spring
14 Upper Relay Diaphragm
15 Lower Relay Diaphragm
16 Upper Relay Head
17 Lower Relay Head
18 Spring Seat
19 Hex Nut
20 Cap Screw
23 Pipe Plug or
Vent Assembly
24 Pipe Nipple
25 Filter Assembly
26 Bleed Valve
27 Nameplate
28 Gasket
30 Pipe Plug
33 Handwheel
34 Hex Nut
35 Spring Seat
40 O-ring
41 Adaptor
42 Yoke Cap
43 Lockwasher
44 Machine Screw
45 Valve Spring Seat
46 Cap Screw
47 Machine Screw
48 Cap Screw
50 Drive Screw
51 Diaphragm Insert
52 Lower Yoke Cap
53 Bleed Plug
54 Vent Assembly
20A6328
DETAIL OF CAPPED ADJUSTING SCREW
OPTION
20A6326
TYPE 61L, 61LD, AND 61LE PILOT
30A6327
DETAIL HANDWHEEL OPTION
Figure 1. Type 61L, 61LD, and 61LE Pilot Assemblies
2
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