J. Pilot Valve Tester
The pilot valve test indicator (Figure 76) is available for
the modulating and pop action pilot valves. The valve
test indicator measures the set pressure of the pilot,
while maintaining pressure on the main valve dome
area; thereby, allowing only the pilot to actuate.
K. Pressure Differential Switch
Electrical: A pressure differential switch (Figure 77)
is available which may be wired to an operator station
or some other remote location. The switch will provide
a signal that indicates when the main valve is opening.
The standard pressure differential switch is a single
pole, double throw, rated at 5 amps and 30 volts DC
with a NEMA 4 enclosure. (For other configurations,
consult the factory.)
Pneumatic: For applications that do not permit an
electrical differential switch, an option is available
to provide pneumatic signal to indicate when the
main valve opens.
XXII. 2900 Pilot Valve Options (Contd.)
Figure 77: Pressure Differential Switch
Figure 76: Pilot Valve Tester
Consolidated 2900 Series POSRV Maintenance Manual
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