Potter Releasing Systems - Manual (Page 25)

25
Wet System With Excess Pressure
(Waterflow With Pressure Supervision)
Fig. 6
TO EXCESS
PRESSURE
PUMP
CHEC
K
RBV
S
EXCESS
PRESSURE
SUPERVISION
PS120-1
PS120-2
BVL
BLEEDER
VALVE
(OPEN)
CITY WATER
PRESSURE
GAUGE
TAMPER
DEVICE
OSYSU
(OPEN)
OSY CONTROL
VALVE (OPEN)
WATER PRESSURE
FROM CITY MAINS
CHECK
RISER TO
SPRINKLER
HEADS
WATER BY-PASS
TEST VALVE
(CLOSED)
WATERFLOW SWITCH
(NO RETARD)
PS10-1
PS10-2
RBVS
STRAINER
DRAIN
VALVE
(CLOSED)
TO WATER
MOTOR GONG
DRIP
CUP
CHECK
VALVE
DRAIN
PIPE
DWG# 8704200-F1
Unless excess pressure is pumped into system, the waterflow device should have a retard per NFPA 72 2010
17.12. There shall be no shut-off valve in line to a pressure type waterflow switch, unless the shut-off is electri-
cally supervised. Per NFPA 72 2010 23.8.5.10.4, the Potter Model RBVS is designed to electrically supervise
ball valves.