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Most Fuji Ring Compressors should not be operated in a “dead-head” condition. These relief valves are designed to protect the blowers from overheating when operating dead-headed. The valves are preset to provide the proper protection for the appropriate model, which is approximately 90% of the dead-head pressure level, and is adjustable to a lower setting.
Pressure Relief Valves
Pressure Relief Valves Drawing
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Model No.

For Use With Blower Model

Factory Setting (“H2O")

Thread Size

PV3 N/A VFC30 N/A 42 N/A 1 1/2" MPT
PV4 N/A VFC40 N/A 46 N/A 1 1/2" MPT
PV5 N/A VFC50 N/A 68 N/A 1 1/2" MPT
PV6 N/A VFC60 N/A 100 N/A 2" MPT
PV7 N/A VFC70 N/A 98 N/A 2" MPT
PV8 N/A VFC80 N/A 127 N/A 2" MPT
PV9 N/A VFC90 N/A 127 N/A 2 1/2" MPT
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