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ANDERSON GREENWOOD TyPE 95 POSRV
MAINTENANCE INSTRUCTIONS
7.0 VALVE DIAGNOSIS GUIDE
Problem
Valve does not close
on start-up with little or
no cargo tank pressure
Valve opens at a
pressure below
nameplate set pressure
Valve opens at
correct pressure
but does not close
8.0 REPAIR KITS
2 x 3
Main valve size
3 x 4
4 x 6
6 x 8
Pilot
Backflow preventer (diaphragm)
Check valve (ball check)
Engineering Doc. #05.9040.083 Rev. E
page 10
ANGMC-6026-US-1312
Causes
(Refer to Figure 1)
Main valve piston in lift position,
pressurize dome through field test
handvalve [0.5 to 1.0 kp/cm
close piston.
Set pressure incorrect
Auxiliary setter device incorrect
one for valve.
Auxiliary setter device not screwed
down all the way.
Pilot sense diaphragm leaks. Check
for gas flow through pilot spring
bonnet vent.
Backflow preventer check valve
leaks. (Item 15, Figure 2) Check
for gas flow at discharge tube to
main valve outlet. No gas flow
should be detected.
Pilot not sensing correct tank pressure
Check valve in tank pressure sense
line (Figure 1) restricted.
Filter screen in pilot or small orifices
in pilot restricted.
IMPORTANT
IN AN EMERGENCy, MAIN VALVE
CAN BE CLOSED By PRESSURIZING
DOME (TOP OF PISTON) THROUGH
CLOSE TEE (ITEM 13, FIGURE 2) REMOVE
PLUG (ITEM 18) AND APPLy PRESSURE
EQUAL TO TANK PRESSURE.
Soft goods
04.4744.810
kit part number
04.4744.804
04.4744.834
04.4744.835
04.4744.025
04.4744.781
04.4744.782
Copyright © 2013 Pentair
] to
2
Bolt
04.4744.330
kit part number
04.4744.331
04.4744.332
04.4744.333
04.4744.333
04.4744.335
None
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