Section 10, Inlet Control Valve; Figure 10-1 - Inlet Control Valve (Body) - Gardner Denver VST110 Operating And Service Manual

SECTION 10
INLET CONTROL VALVE
INLET CONTROL VALVE – This device is located at the intake flange of the compressor. During
compressor stoppage, planned or accidental (e.g. power failure), it blocks off the compressor intake and
allows it to remain pressurized and ready for quick re-start. A spring-loaded check feature is provided as
added insurance against air or oil backflow
During compressor operation, the underside of the poppet is vented to atmosphere via a 3-way solenoid
valve, allowing the poppet to fall (open) and feed fresh air to the compressor inlet-the spring loaded check
feature is pushed open by a very small pressure differential resulting from the incoming air stream.
During stopped operation modes (e.g. commanded from keypad or initiated by protective shutdown), the
compressing the spring loaded check feature and blocking-off the compressor intake.
Refer to Parts List 13-18-505 for spare parts.
Inlet Control Valve (Body) Inspection - The valve does not require maintenance or lubrication. If air/oil
leaks develop across the valve disc during pressurized conditions (e.g., machine stopped), valve seat and
disc should be inspected for wear and tear signs:
1. Be sure the unit is completely off and oil reservoir is depressurized.
2. Disconnect, lockout and tagout power supply to the compressor package.
Figure 10-1 – INLET CONTROL VALVE (BODY)
13-17-605 Page 67