Potter Releasing Systems - Manual (Page 21)

21
Pressure Type Flow Switch With Built-in Retard
Fig. 4
Note:
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
electrically supervised. The Potter Model RBVS is designed to electrically supervise ball valves.
RISER TO
SPRINKLER HEADS
WATER PRESSURE GAUGE
(SYSTEM PRESSURE)
BY-PASS LINE
CHECK VALVE USED TO
BUILD SYSTEM PRESSURE
FROM SMALL SURGES
WATER PRESSURE GAUGE (CITY
PRESSURE)
TAMPER
DEVICE
OSYSU
OSY CONTROL VALVE
(OPEN)
WATER PRESSURE FROM
CITY MAINS
(OPEN)
(OPEN)
CHECK
WATER BY-PASS TEST
VALVE (CLOSED)
DRAIN
PIPE
CHECK
VALVE
STRAINER
DRAIN
VALVE
(CLOSED)
DRIP
CUP
RETARD
CHAMBER
TO WATER
MOTOR GONG
WFSR-F
WATERFLOW DEVICE
WITH BUILT-IN
RETARD
RBVS