Bell & Gossett 70M Multiple Pump & Control Pressure Booster Systems - Manual (Page 26)

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Item Name Primary Function
1 Strainer Prevents orifice from clogging.
2 Check Valve Prevents backflow from top of diaphragm when pump stops.
3 Orifice Provides metered water flow to top-side of diaphragm.
4 Opening Speed Flow Control Dampens pressure fluctuations (slow opening).
5 CRD Pilot PRV.
6 Gauge Optional location for system pressure gauge.
7 Cock Adjustment for rate of closure (non-slam).
8 Check Valve Prevents backflow from top of diaphragm during normal operation.
9 Vent Bleeds air from top of diaphragm.
10 Diaphragm Divides inlet and outlet pressures.
COMBINATION PRESSURE REDUCING AND CHECK VALVE
Table I: Complete Valve CLA-VAL Model 90-01A - 125#, epoxy coated, bronze trim valves
with 30-300# pilot (CRD) spring range.
B&G Part No.
Size Angle Style (for 70M) Globe Style (for 70E)
1 1 /
2
NPT S11230 S11882
2 Flanged S11231 S11883
2 1 /
2
Flanged S11232 S11884
3 Flanged S11233 S11885
4 Flanged S77535 N/A
Table II: PRV Repair Kits
PRV Size 1 1 /
2
" 2" 2 1 /
2
" 3" 4"
Cla-Val Repair Kit No. 8155001E 8155002C 8155003A 8155004J 8155005F
B&G Part No. 185251 185252 185253 185254 185255
Above Kits consist of the following parts and Cla-Val Part No.:
Strainer C2891E C2891E C3084F C084F C3085C
Diaphragm, Main Valve 83239E 80522G 83240C 83241A C8184J
Disc, Main Valve V5562D V5564G V1637H V1734C V5467F
Spencer Washers (3) V5180E V5332D V0631B V0631B V0634F
Diaphragm, Pilot C6936D C6936D C6936D C6936D C6936D
Gasket, Pilot 40174F 40174F 40174F 40174F 40174F
Disc Retainer, Pilot C4256H C4256H C4256H C4256H C4256H
PRV REPAIR KITS
10
1
2
3
6 5
4
9 8
7