30
Anderson Greenwood
SerieS 9300 Pilot oPerated Safety relief ValVeS
InstallatIon and MaIntenance InstructIons
6 trouble sHootinG
Problem
Possible cause
resolution
1. Valve opens below set
1. improper installation of sense line
1. Verify if sense line is installed properly
2. Plugged sense line
2. Check sense line, inlet screen, and dipper tube for cleanliness
3. improper gauge accuracy and/or location
3. Verify gauge accuracy for valve being tested and ensure
location is at valve being tested
2. Pilot leaks from upper vent
1. Sense diaphragm failure
1. replace diaphragm
2. Spindle lock nut loose
2. tighten spindle lock nut
3. Pilot leaks from lower vent
1. Pilot seat leakage
1. on the 93 pilot, replace spindle disc assembly.
on the 93t and 91 pilots, replace seat.
inspect nozzle and relap if necessary
2. Nozzle over tightened
2. tighten nozzle per assembly instructions
4. Main valve leaks
1. Seat film damaged
1. replace seat film
2. Nozzle damaged
2. inspect nozzle and relap if necessary
3. Nozzle seal damaged, missing, or out of place
3. Position nozzle seal per assembly instructions
4. Seat plate assembly is loose
4. tighten seat plate assembly
5. operating too close to set pressure (above 96%)
5. lower operating pressure
6. Main valve diaphragm failure
6. replace diaphragm
7. diaphragm assembly loose
7. tighten diaphragm assembly
8. Seat plate not fully threaded on hub
8. install seat per assembly instructions
7 MAin VAlVe sPAre PArts And rePAir kits
Soft goods repair kits contain all the diaphragms,
seals, and seats to a repair valve. to order a kit,
specify the base number and select the last
three digits from the following tables.
to ensure the purchase of the correct
repair kit, the order should specify the valve
model and serial number. for chloride rich
environments, the bolts in the main valve and
pilot exposed to the environment should be
replaced during routine maintenance or at least
every 5 years.
7.2 - series 9300 MAin VAlVe duAl cHAMber diAPHrAGM rePAir kit (06.0235.XXX))
kit type
internals
Materials
2”
3”
4”
6”
8”
10”
12”
Soft goods
aluminum
Ptfe/Kalrez
®
382
384
386
388
390
392
394
Soft goods
SSt
Ptfe/Kalrez
®
545
547
549
551
553
555
557
Bolt
aluminum
SSt
395
396
397
398
399
400
401
Bolt
SSt
SSt
402
403
404
405
406
407
408
7.1 - series 9300 MAin VAlVe sinGle cHAMber diAPHrAGM rePAir kit (06.0235.XXX)
kit type
internals
Materials
2”
3”
4”
6”
8”
10”
12”
Soft goods
aluminum
Ptfe
319
321
323
526
327
329
331
Soft goods
SSt-lP
Ptfe
496
498
500
527
504
506
508
Soft goods
SSt-HP
Ptfe
356
360
364
528
372
376
380
Bolt
aluminum
SSt
332
333
334
335
336
337
338
Bolt
SSt-lP
SSt
339
340
341
342
343
344
345
Bolt
SSt-HP <15 psig
SSt
346
347
348
570
350
351
352
Bolt
SSt-HP ≥15 psig
SSt
346
347
348
349
350
351
352
Bolt
SSt Marine
SSt
624
625
626
627
628
629
630
Bolt
SSt Marine certs
SSt
-
-
-
631
632
633
634
