Type 289P
4
Before installing, inspect the main valve and pilot for
any shipment damage and any foreign material. Make
sure that the valve is oriented so that pipeline ow
enters the port labeled inlet. Apply pipe compound on
the pipe threads, but not on the body threads.
The typical pilot mounting position is shown in
Figures 1 and 2. To achieve other desired connections,
the pilot may be rotated on the pipe nipple.
The Type 289P requires a control line attached to the
1/4 NPT control connection. The control line should
be 3/8-inch (9,5 mm) outer diameter pipe or tubing or
larger and connected to a straight run of inlet piping.
If the pipeline contains dirt, install a lter in the control
line and/or upstream piping.
If venting gas will accumulate and be
an explosion hazard under enclosed
conditions, such as in pit or underground
installations, make sure the installation
is remotely vented to a safe location.
To avoid possible injury or equipment
damage, never adjust the pilot control
spring to produce a set pressure higher
than the upper limit of the set pressure
range for that particular spring.
If it is necessary to vent the unit, install a 3/8-inch
(9,5 mm) exhaust line into the 3/8 NPT pilot exhaust
connection. This exhaust line may be vented directly
into the main valve outlet or separately to atmosphere.
In either case, the vent line or stack diameter should be
as large as practical with a minimum number of bends or
other restrictions.
A vent line or stack must be located to avoid venting
gas near buildings, air intakes, or any hazardous
location. The line or stack opening must be protected
against debris, weather, condensation, insects, or
anything else that might clog it.
Note
Do not adjust the main valve spring.
Startup and Shutdown
With proper installation complete, slowly open
the upstream shutoff valve while using a gauge to
monitor inlet pressure to startup the relief valve or
backpressure regulator. If set pressure adjustment is
necessary, see the Pilot Adjustment section.
To shutdown, slowly close the upstream shutoff valves.
Release all pressure from the main valve and pilot by
opening a vent valve.
Pilot Adjustment (See Figure 6 or 7)
If outlet pressure adjustment is necessary, monitor relief
(inlet) pressure with a gauge during the adjustment
procedure. Remove the pilot closing cap (key 12)
and loosen the locknut (key 11). Turn the adjusting
screw (key 10) into the spring case to increase the set
pressure. Turn the adjusting screw out of the spring
case to decrease the set pressure. When adjustment
is completed, tighten the locknut to lock the adjusting
screw in position and replace the pilot closing cap.
Maintenance
Relief valve parts are subject to normal wear and must
be inspected and maintained as necessary, depending
upon the service conditions.
Avoid personal injury or damage
to property from sudden release
of pressure or uncontrolled gas or
other process uid. Before starting
to disassemble, carefully release all
Table 1. Relief Set Pressure Ranges and Pilot Control Spring Infromation
MAIN VALVE
BODY SIZE,
NPS
PILOT
TYPE
RELIEF SET
PRESSURE RANGE
PILOT CONTROL SPRING INFORMATION
Part Number Color
Wire Diameter,
Inches (mm)
Free Length,
Inches (mm)
1 6358B
10 to 18 psig
18 to 30 psig
30 to 100 psig
(0,69 to 1,2 bar)
(1,2 to 2,1 bar)
(2,1 to 6,9 bar)
1B986027212
1B788327022
1K748527202
Green
Unpainted
Red
0.120
0.142
0.187
(3,05)
(3,61)
(4,75)
2.125
2.125
2.125
(54,0)
(54,0)
(54,0)
2
6365 14-inches w.c. to 2 psig (35 mbar to 0,14 bar) 14A9672X012 Yellow 0.070 (1,78) 2.125 (54,0)
6358B 2 to 10 psig (0,14 to 0,69 bar) 14A9673X012 Black 0.102 (2,59) 2.125 (54,0)
!
WARNING
!
WARNING
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