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 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.
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
Relay Spring Case
2
Relay Valve Body
3
Bottom Cover
4
Relay Yoke
5
Closing Cap Assembly, 61 Series except Type 61HP
6
Adjusting Screw
7
Control Spring
8
Relay Orifice, 61 Series except Type 61HP
Fast close and open, open only or close only (Types 61L and
61LD only)
Special orifice, fast open only application (Types 61L and 61LD only)
9*
Disc Holder Assembly, 61 Series except Type 61HP
10* Bleed Orifice, 61 Series except Type 61HP
Capped bleed (Types 61L and 61LD only)
11
Diaphram Nut, 61 Series except Type 61HP
12* O-ring Seal, 61 Series except Type 61HP
13
Relay Spring
14* Upper Relay Diaphragm
15* Lower Relay Diaphragm
16
Upper Relay Head, 61 Series except Type 61HP
Diaphragm Plate, Type 61HP only
17
Lower Relay Head, 61 Series except Type 61HP
18
Spring Seat, 61 Series except Type 61HP
19
Hex Nut
20
Cap Screw, 61 Series except Type 61HP
23
Pipe Plug, Types 61L, 61LD and 61LE only, or
Vent Assembly, Type 61H only
24
Pipe Nipple
25
Filter Assembly
26
Bleed Valve
27 Nameplate
28* Gasket, 61 Series except Type 61HP
30
Pipe Plug, 61 Series except Type 61HP
32
Bleed Orifice Cap, Types 61L and 61LD with capped bleed only
33
Handwheel, Types 61L, 61LD and 61LE only
34
Hex Nut
35
Spring Seat
40* O-ring, Types 61L, 61LD and 61LE only
41
Adaptor, Type 61H only
42
Yoke Cap, Type 61HP only
43
Lockwasher, Types 61L, 61LD and 61LE only
44
Machine Screw, Types 61L, 61LD and 61LE only
45
Valve Spring Seat, Type 61HP only
46
Cap Screw, Type 61HP only
47
Machine Screw, Type 61HP only
48
Cap Screw, Type 61HP only
50
Drive Screw
51* Diaphragm Insert, Type 61HP only
52
Lower Yoke Cap, Type 61HP only
53
Bleed Plug, Type 61HP only
*Recommended spare part.
61 Series
2