Emerson Fisher 167DA - Page 5

167D Series
5
Figure 5. Typical Switching Valve Schematic
Figure 4. Typical 167D or 167DS Installation
(Warning system using Type 167D or 167DS two-way valve to activate a whistle when pump discharge pressure falls.)
AF8400
COOLING TOWER
PUMP
PUMP DISCHARGE
TO INSTRUMENT AIR SUPPLY
bar
WHISTLE
TYPE 167D OR 167DS SWITCHING
VALVE SET TO OPEN AT
bar
A
D
C
PRESSURE GAUGE
Figure 3. Typical 167DA or 167DAS Installation
(Lockup system using Type 167DA or 167DAS to close air circuit to diaphragm of main valve in case of plant air failure. Main valve
will remain in position it occupied at time of supply pressure failure.)
TYPE 657
TYPE 67CFR
TYPE

TYPE 167DA OR 167DAS

A
B
A
B
C
D
10C0622
TYPE 657
TYPE

67CFR
CHECK
VALVE


VOLUME TANK
SHIPPED WITH ACTUATOR

CUSTOMER SUPPLIED TUBING
(PIPED BY CUSTOMER)
ASCO SOLENOID
DE-ENERGIZED
TYPE 167DA
OR 167DAS
A
B
C
SUPPLY
1
2

VENT
D
GE37992
S