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ANDERSON GREENWOOD

TyPE 95 POSRV

MAINTENANCE INSTRUCTIONS

page 2

ANGMC-6026-US-1312

Copyright © 2013 Pentair 

Engineering Doc. #05.9040.083 Rev. E

FIGURE 1

P (Tank)

P (Tank)

Field test

Auxiliary

setting

device

Bonnet

vent

Check

valve

Tank pressure

sense line

Main

valve

Unbalanced

Piston

Dome 

(top of the piston)

Pilot vent

Pilot

Inlet 

(tank pressure)

O-ring seat

Outlet

TABLE OF CONTENTS

1.0

General valve description  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2.0

Accessory maintenance  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

3.0

Main valve maintenance  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

4.0

Pilot maintenance  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 

5.0

Pilot set pressure adjustment  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

6.0

Pilot set pressure field test procedure  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

7.0

Valve diagnosis guide  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

8.0

Soft goods repair kits  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Summary of Contents for ANDERSON GREENWOOD 95 POSRV

Page 1: ...tallation or maintenance of the product or the use of parts or components not manufactured by Anderson Greenwood may result in a failure of the product Any installation maintenance adjustment test etc...

Page 2: ...eck valve Tank pressure sense line Main valve Unbalanced Piston Dome top of the piston Pilot vent Pilot Inlet tank pressure O ring seat Outlet TABLE OF CONTENTS 1 0 General valve description 1 2 0 Acc...

Page 3: ...ighten the body bolts first one side then the opposite side Do not overtighten the bolts as this will distort the diaphragm and cause leakage NOTES 1 Gasket used on some check valves If check valve ha...

Page 4: ...replace the seat The piston seal should not need to be replaced If the piston seal is removed a new seal must be installed The piston can be removed from the cap liner by pulling the piston out or by...

Page 5: ...tightening will damage them Hold the hex spacer when torquing the spindle nut to prevent the stack from rotating After the pilot is assembled the set pressure must be adjusted Refer to Section 5 0 for...

Page 6: ...ANDERSON GREENWOOD TyPE 95 POSRV MAINTENANCE INSTRUCTIONS page 6 ANGMC 6026 US 1312 Copyright 2013 Pentair Engineering Doc 05 9040 083 Rev E Type 95 pilot with auxiliary setter FIGURE 4A...

Page 7: ...ANDERSON GREENWOOD TyPE 95 POSRV MAINTENANCE INSTRUCTIONS Copyright 2013 Pentair ANGMC 6026 US 1312 page 7 Engineering Doc 05 9040 083 Rev E FIGURE 4B...

Page 8: ...e will decrease due to the pressure drop in the lines to the accumulator The set pressure is the highest pressure recorded on the supply pressure gauge 5 3 Decrease the supply pressure to the correct...

Page 9: ...e 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...

Page 10: ...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 Valve opens at Pilot not sensing correct tank pressure correct pr...

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