| 摘要 |
Pumps or other fluids handling devices are protected from contaminants in the fluids by alternately presenting localized portions of a filter media to the flow paths of fluids entering and leaving the device to filter out the contaminants from the fluids entering the device and to flush out the filter media with the fluids leaving the device. In a preferred embodiment, a continuous revolving filter intersects the inlet and discharge passages of a pump to divert contaminant particles in the fluid from the pump inlet to the pump outlet without allowing the particles to pass through the pump, and concurrently backwashing the filter element by pressurized fluid from the pump.
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