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Pre-fill valve

Pre-fill valve

A valve that is arranged so its inlet port is connected to a reservoir or tank and so that fluid will flow from the inlet of the valve into a cylinder or ram when opened.
When closed, the valve must close off the ram or cylinder from the reservoir or tank to permit application of high pressure from another source on the cylinder side of the valve.
Most commonly used to fill large rams on presses to take up non-operating stroke. (0615)