Pentair ANDERSON GREENWOOD 95 POSRV, Maintenance Instructions Manual

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ANDERSON GREENWOOD TyPE 95 POSRV
MAINTENANCE INSTRUCTIONS
Copyright © 2013 Pentair ANGMC-6026-US-1312 page 3
Engineering Doc. #05.9040.083 Rev. E
2.0 ACCESSORY MAINTENANCE (REFER TO FIGURE 2)
The accessories used on the Type 95 are the auxiliary setter, field test and backflow
preventer. The field test and backflow preventer are always used; the auxiliary setter
is optional.
Only the backflow preventer, which consists of one
(2)
diaphragm type check valve and a
ball check valve requires maintenance. Normal maintenance is to clean the check
valves and replace the diaphragm, washer, gasket,
(1)
and O-ring.
When replacing the diaphragm, care should be taken not to damage the diaphragm. To
assemble the diaphragm type valve, uniformly tighten 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 has gasket, use gasket
supplied in repair kit - otherwise discard kit gasket.
(2)
Some earlier model valves use two diaphragm check valves and no ball check valve.
ITEM DESCRIPTION
* 1 Auxiliary setting device
2 Supply tubing
3 Pilot exhaust tubing
4 Pilot bracket bolt
* 5 Pilot
6 Pipe nipple
7 Field test hand valve
8 Field test plug
9 Connector
10 Check valve
11 Connector
12 Connector
13 Close tee
15 Check valve
16 Connector
17 Connector
18 Pipe plug
19 Body bolt
20 Lock washer
21 Upper body
* 22 Diaphragm
* 23 Washer
24 Spring pin
25 Lower body
26 Body
27 Spring
28 Ball
29 O-ring
(1)
30 Gasket
* Recommended spare parts for repairs
Auxiliary setter, with field test and backflow preventer
indexed in order of disassembly
FIGURE 2