Johnson Controls Tyco DV-5a Series Manual page 3

Port
P1 Diaphragm Chamber Supply
P2 Water Supply Pressure & Alarm Test
P3 Alarm Actuation
P4 Automatic Drain Valve
P5 System Drain
P6 Main Drain
P7 System Air Supply
SYSTEM OPEN TO ATMOSPHERE
VALVE
WATERWAY
DIAPHRAGM
SEAT
DIAPHRAGM
CHAMBER
DIAPHRAGM
CHAMBER
SUPPLY
FROM
UPSTREAM
SIDE OF
SHUT-OFF
VALVE
DRAIN FROM SYSTEM
VALVE
WATERWAY
DIAPHRAGM
CHAMBER
OPEN TO
ATMOSPHERE
WATER SUPPLY SHUT OFF
SYSTEM DRAIN CONDITION
Port Description
SYSTEM
AIR
SUPPLY
AUTOMATIC
DRAIN VALVE
OPEN TO
ATMOSPHERE
WATER SUPPLY
PRESSURE &
ALARM TEST
WATER SUPPLY
FIGURE 2A
SET CONDITION
SYSTEM
DRAIN
OPEN
MAIN
DRAIN
OPEN
FIGURE 2C
DV-5 VALVE OPERATION, PREACTION SYSTEMS
a
Port Sizes, NPT Inch per ANSI B1.20.1
1-1/2 2 3
(DN40) (DN50) (DN80)
1/2 1/2 1/2
1/2 1/2 1/2
3/4 3/4 3/4
1/2 1/2 1/2
3/4 3/4 3/4
3/4 3/4 1-1/4
1/2 1/2 1/2
VALVE
WATERWAY
DIAPHRAGM
CHAMBER
OPEN TO
ATMOSPHERE
DIAPHRAGM
RETRACTS
OPENING
VALVE
WATERWAY
WATERFLOW FROM WATER SUPPLY
VALVE
WATERWAY
DIAPHRAGM
SEAT
DIAPHRAGM
AUTOMATICALLY
FLEXES TO
ITS SEATED
POSTION
DIAPHRAGM
CHAMBER
SUPPLY
FROM
UPSTREAM
SIDE OF
SHUT-OFF
VALVE
FIGURE 2
4 6 8
(DN100) (DN150) (DN200)
1/2 1/2 1/2
1/2 1/2 1/2
3/4 3/4 3/4
1/2 1/2 1/2
3/4 3/4 3/4
2 2 2
1/2 1/2 1/2
WATERFLOW TO SYSTEM
FIGURE 2B
OPERATED CONDITION
RESIDUAL DRAIN FROM SYSTEM
WATER SUPPLY SHUT OFF
FIGURE 2D
RESIDUAL DRAIN CONDITION
TFP1425
Page 3 of 34
ALARM PORT
WATERFLOW
TO ALARM
AUTOMATIC
DRAIN VALVE
CLOSED
SYSTEM
DRAIN
OPEN
MAIN
DRAIN
CLOSED