Emerson VSX4 Series - Page 5

OUTLET PRESSURE, P
d
INLET PRESSURE, P
u
ATMOSPHERIC PRESSURE, Pb
ERAA11922-02
Figure 4. VSX4/VSX8 Series Operational Schematics
DIAPHRAGM
CAM
RESET BUTTON
RESET PIN
VALVE PLUG
VALVE PLUG SPRING
DOWNSTREAM SENSE
BLOCKING SCREW
OVERPRESSURE SHUTOFF (OPSO)
ADJUSTING SCREW
UNDERPRESSURE SHUTOFF (UPSO)
ADJUSTING SCREW
UNDERPRESSURE
SHUTOFF (UPSO) SPRING
OVERPRESSURE
SHUTOFF (OPSO) SPRING
ERAA10261-AA
VSX8 SERIES
DIAPHRAGM
CAM
RESET BUTTON
RESET PIN
VALVE PLUG
VALVE PLUG SPRING
DOWNSTREAM SENSE
BLOCKING SCREW
OVERPRESSURE SHUTOFF (OPSO)
ADJUSTING SCREW
UNDERPRESSURE SHUTOFF (UPSO)
ADJUSTING SCREW
UNDERPRESSURE
SHUTOFF (UPSO) SPRING
OVERPRESSURE
SHUTOFF (OPSO) SPRING
VSX4 SERIES
VSX4 and VSX8 Series
5