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ANDERSON GREENWOOD TYPE 91 AND 94 PILOT OPERATED SAFETY RELIEF VALVES
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Type 94
(Elastomer seat)
FIGURE 3
Item
Description
100
Body
110
Nozzle
130
Boost spacer
140
Sense spacer
150
Sense plate
160
Boost plate
200
Bonnet assembly
210
Upper diaphragm case
220
Lower diaphragm case
230
Spacer ring
350
Blowdown adjustment needle
400
Filter screen
420
Seat - retainer (Type 94 only)
430
Ring - retainer (Type 94 only)
500
Diaphragm needle
510
Diaphragm - sense/boost
View A - A
(Low pressure pilot)
Exhaust
Item
Description
550
Spindle
560
Check plate
570
Seat
580 *
Bonnet gasket
590 *
Boost tube seal
610 *
Body bolt seal
620 *
Blowdown seal
630 *
Bushing seal
650 *
Diaphragm gasket
660 *
Spindle seal
690 *
Spindle diaphragm gasket
760
Cap
790
Pressure adjustment screw
800
Body vent
810
Bonnet vent
830
Disc - spring
Type 91
(PTFE seat)
NOTES
*
Recommended spare parts for repairs
1.
Only used if item 500 is PTFE
Refer to Section 8 for soft goods repair kits.
[1]
5
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