ANDERSON GREENWOOD
TyPE 95 POSRV
MAINTENANCE INSTRUCTIONS
Copyright © 2013 Pentair
ANGMC-6026-US-1312
page 9
Engineering Doc. #05.9040.083 Rev. E
6.0 PILOT SET PRESSURE FIELD TEST PROCEDURE (REFER TO FIGURE 6)
This procedure is for measuring the pressure where the valve will open. It will not
measure where the valve closes. To measure the closing pressure, use the procedure in
Section 5.0.
6.1
Remove the pilot discharge tube from the pilot and replace with a cap that has
a .06" diameter [1.5 mm] hole in it.
6.2
Connect the test equipment to the field test valve.
6.3
With the metering and vent valve closed, open the gas bottle and adjust the
regulator pressure to about 200 psi [14 kp/cm
2
].
6.4
Open the field test valve. Slowly open the metering valve and observe the test
gauge. Increase the pressure until gas flow at the pilot discharge fitting increases
rapidly. The pressure at which this occurs is the set pressure of the valve.
6.5
To adjust the opening pressure turn the spring adjusting screw under the
cap/adapter “IN” to increase pressure or “OUT” to decrease pressure.
6.6
The IMO (International Maritime Organization) Rule set pressure tolerances are:
+ 10%
0 - 21.3 psi [0 - 1.5 kp/cm
2
]
+ 6%
21.3 - 42.7 psi [1.5 - 3.0 kp/cm
2
]
+ 3%
42.7 psi or 3.0 kp/cm
2
and above
Type 95 pilot recommended field test set-up
Adapter fitting to
1
/
2
" NPT port on
field test valve
Primary set
pressure
adjustment
under cap
Nitrogen
bottle with
shutoff
valve and
regulator
Bonnet
vent
Pilot
Field
test
valve
Test gauge
Metering
valve
Auxiliary set
pressure
adjustment
under cap
High
pressure
hose
Vent
valve
Unscrew here
for removal
(install hand-tight only –
lubricate threads)
Pilot
discharge
fitting
Auxiliary setter
Pilot
discharge
tube
Main valve
FIGURE 6
