Kellogg 321/332/335/452 Centrifugal Unloader Assy, 48870 #019784

Centrifugal Unloader Valve Assembly with weights.

The Centrifugal Unloader Valve Assembly keeps the pump unloaded during startup so the motor can come up to speed without fighting compression. Once the flywheel reaches operating RPM, centrifugal force moves the weights outward, closing the unloader and allowing the pump to begin compressing air.

Typical Centrifugal Unloader Symptoms:

• Constant unloader hissing
• Pump not building pressure
• Hard starts or tripping breakers
• Unloader not engaging/disengaging

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