Main Valve Maintenance - Emerson Anderson Greenwood 95 Series Installation And Maintenance Instructions Manual

Anderson Greenwood SerieS 95 Pilot oPerated Safety relief ValVeS
InstallatIon and MaIntenance InstructIons
fiGure 3
indexed in order of disassembly

3 MAin VAlVe MAintenAnce

Refer to Figure 3
Normal valve maintenance will be to only clean
the parts. it may also be necessary to 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 pushing it out
with a rod through the hole in the top of the
cap/liner.
No lubricant is required on the piston seal.
a small amount of thread sealant should be
used on the pipe threads to prevent leakage.
Ptfe tape is recommended.
the piston should be assembled to the cap/
liner and the two parts should then be
assembled to the valve body. the piston can
be prevented from sliding out of the cap/liner
during assembly by covering or plugging the
hole in the top of the cap/liner.
for marine service, the bolts in the main valve
and pilot exposed to the environment should
be replaced during routine maintenance every
five years.
item description
10 lower bracket
20 upper bracket
30 Bracket bolt
40 Washer
50 Hex nut
100 Body
110 Screw
140 Piston
150 Seat retainer
200 Washer (used on 6 x 8 only)
210 Cap/liner
420 Bolt
460 Nozzle
520 Nut
550 Washer
560 * Guide seal
610 * o-ring seat
620 * Cap gasket
630 * Nozzle gasket
640 * Washer
700 Cap bolt - hex
710 Cap bolt - eye
[1]
notes
1. recommended spare parts for repairs
* Not shown - used on ≥ 4"
refer to Section 8 for Soft goods repair kits part
numbers.
4