Johnson Controls Tyco PRV-1A - Page 5

TFP1581
Page 5 of 14
LOWER SET PRESSURE CONDITION HIGHER SET PRESSURE CONDITION
TURN
ADJUSTING
SCREW
COUNTERCLOCKWISE
TO DECREASE
PRV-1A VALVE
WATERFLOW
PRESSURE
TURN
ADJUSTING
SCREW
CLOCKWISE
TO INCREASE
PRV-1A VALVE
WATERFLOW
PRESSURE
SUPPLY
PRESSURE
SUPPLY
PRESSURE
SET
REDUCED
PRESSURE
SET
REDUCED
PRESSURE
ADJUSTING
SCREW LOCK
HEX NUT
DOWNSTREAM
PRESSURE
COMMUNICATION
PORT (FAR SIDE)
WATER SUPPLY INLET
PORT WITH RESTRICTION
ORIFICE (NEAR SIDE)
SET PRESSURE
GAUGE PORT
TAMPER
CAP
COVER
SCREW
DIAPHRAGM
CHAMBER
OUTLET
PORT
DIAPHRAGM
SUPPORT
DIAPHRAGM
HEX NUT
SPRING
SUPPORT
ADJUSTING
SCREW
SEAL
SUPPORT
SEAL
BODY
BODY
PLUG
BODY
DIAPHRAGM
VENT
SPRING
O-RING
COVER
SEAL
SEAT
FIGURE 5
MODEL PRV-1
A PRESSURE REDUCING VALVE
MODEL P1 PILOT VALVE ASSEMBLY AND ADJUSTMENT