
Type 122A
3
Figure 2. Type 122A Three-Way Switching Valve Operational Schematic
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
W0157
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
ADJUSTING SCREW
UPPER VALVE SEAT
LOWER VAVE SEAT
DIAPHRAGM
SPRING
STEM
PORT D
PORT A
PORT C
PORT B
VALVE
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