Emerson Anderson Greenwood 9300 Series Installation And Maintenance Instructions Manual page 16

Anderson Greenwood SerieS 9300 Pilot oPerated Safety relief ValVeS
InstallatIon and MaIntenance InstructIons
7. install the spool (36) with spindle (24) in
the body (1). Position the spool (36) to
engage the anti-rotation groove pin (21).
8. install a diaphragm case gasket (15) on
the lower diaphragm case (2) and the
feedback diaphragm support plate (14).
note: install the support plate (14) with
the rounded edge up towards the feedback
diaphragm (38).
9. install the following parts in the order listed
on the spool (36):
a. feedback diaphragm support plate (14)
b. Gasket (15)
c. feedback diaphragm (38)
d. diaphragm (19)
e. lantern ring (35)
f. Gasket (15)
g. Sense diaphragm (34)
h. Sense plate (33)
note: install the sense plate (33) with the round
edge towards the sense diaphragm (34).
i. install -022 o-ring (18) around
the spindle. on the sense, add plenty of
lubricant to the o-ring.
10. install bonnet studs (43) thru upper
diaphragm case (3). install the upper
diaphragm case (3), case bolts (13, 48),
washers (16, 50), and nuts (17, 49).
11. install the spindle spring (3) and spool
retainer nut (30). lube nut with dow
Corning 33 on bevel and use fluorolube
on the threads. Push down on the spool
retainer nut (30) with a Phillips screw driver
engaging the anti-rotation pin (21) and
tighten the nut to 10 foot pounds using ½"
open end wrench.
note: do not over tighten, the diaphragms
may be damaged.
12. Pretest pilot function by depressing
spindle/diaphragm assembly stack
downward. the spindle spring should return
the stack assembly to the upward position.
if it doesn't return to upward position,
disassemble pilot and re-check assembly.
13. install spring (9), spring washer (8), bonnet
gasket (12) and bonnet (4) onto upper
diaphragm case (3). install bonnet washers
(10,53) and nuts (11) and tighten.
14. install pressure adjustment screw (6),
lock nut (7) and cap (5).
this pilot is now ready for testing.
3.3 Pilot disassembly for flowing modulating
or snap action pilots (series 91, 93, and 93t)
refer to figures 9 thru 13
the pilot disassembly instructions and soft
goods vary between pilot series. Pay particular
attention to orientation of parts and materials.
the 93t pilot has all Ptfe soft goods including
diaphragms, and its maximum set pressure
is 15 psig. the 91 pilot has Ptfe soft goods
with stainless steel (SS), Hastelloy
diaphragms, and its set pressure ranges from
16 psig to 50 psig. the 93 pilot is different from
the 93t and 91 pilot in that it uses elastomer
seat, seals and diaphragms.
1. remove cap (760) and adjusting screw (790)
and adjusting screw seal (720) for vacuum
pilot. remove bonnet bolts (770), seals (700)
for vacuum pilot, bonnet (200), spring (840)
and spring washer (820).
2. on Series 91 and 93t pilots, loosen boost
tube fitting (310) on boost tube (320) at boost
tube connector bolt (270). refer to detail B.
remove boost tube connector nut (300),
washer (290), lover boost tube seal (590),
seal retainer (280). let these three parts
slide down boost tube. remove boost tube
connector bolt (270), upper boost tube seal
(590) and seal retainer (280).
3. on Series 93 pilot, loosen boost tube fitting
(310) on boost tube (320) at boost tube
connector bolt (270). refer to detail B.
remove boost tube connector nut (300),
washer (290), lover boost tube seal (600)
let these three parts slide down boost tube.
remove boost tube connector bolt (270) and
upper boost tube seal (590).
4. remove case bolt nuts (260), washer (250)
and bolts (240). remove upper case (210).
5. on Series 91 and 93t pilot. Hold hex spacer
(120) with a shortwell ¾" socket that has
the ratchet area bored out and inserting
another socket into the bored out hole, loosen.
6. remove parts in the following order: hex
spacer (120), sense plate (150), upper gasket
(650), sense diaphragm case gasket (650),
spindle gasket (680), sense spacer (140), boost
plate (160), spacer ring (230), diaphragm
gasket (620), boost diaphragm gasket (680)
(See figure 12, detail a)
7. on Series 93 pilot. Hold hex spacer (120)
with a shortwell ¾" socket that has the
ratchet area bored out and inserting another
socket into the bored out hole, loosen.
8. remove parts in the following order: hex
spacer (120), sense plate (150),sense
diaphragm (510), upper gasket (650), sense
spacer (140), boost plate (160), spacer
ring (230), diaphragm gasket (620), boost
diaphragm gasket (510), boost spacer (130),
check plate (560) and spindle seal (660).
(See figure 12, detail a)
9. remove boost tube (320) from body (100)
and lower boost tube seal (590/600(93t))
from boost tube (320).
10. remove spindle diaphragm (500) and gasket
(690) for 93t pilot and spindle/disc assembly
(550) from body (100).
11. remove spindle diaphragm plate (170) and
shim washer(s) (490) from spindle/seat
assembly (550).
note: shim washer(s) may not always be
used in assembly (550).
12. refer to detail a. for the 93t pilot seat
, and Ptfe assembly, remove the retainer ring (430)
®
and seat retainer (420) from the spindle/disc
assembly (550). remove the seat (570).
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