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Emerson 91 Installation And Maintenance Instructions Manual page 7

Pilot operated safety relief valves

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ANDERSON GREENWOOD TYPE 91 AND 94 PILOT OPERATED SAFETY RELIEF VALVES
INSTALLATION AND MAINTENANCE INSTRUCTIONS
FIGURE 5
Type 94
View A - A
Item
Description
100
Body
110
Nozzle
120
Hex spacer
130
Boost 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
500
Spindle diaphragm
550
Spindle
560
Check plate
570
Seat
580 *
Bonnet gasket
610 *
Body bolt seal
620 *
Blowdown seal
630 *
Bushing seal
640 *
Gasket case
660 *
Spindle seal
690 *
Spindle diaphragm gasket
760
Cap
790
Pressure adjustment screw
800
Body vent
810
Bonnet vent
840
Spring
NOTES
*
Recommended spare parts for repairs
1.
Only used if item 500 is PTFE
Refer to Section 8 for soft goods repair kits.
[1]
7

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