Counter balanced locking valve

Fluid handling – Self-proportioning or correlating systems

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Details

91420, 137106, F16K 1518

Patent

active

059608145

ABSTRACT:
A valve assembly includes a check valve element in the output chamber. The check valve element opens to permit forward flow of fluid under pressure in the output chamber from a source toward a load. The check valve element closes to block back flow of fluid under pressure in the output chamber from the load toward the source. The back flow of fluid under pressure exerts a closing force upon the check valve element from within the output chamber. A counter force generating element is located within the output chamber and coupled to the valve element. The counter force generating element applies a counter force to the check valve element, which urges the valve element toward the opened condition. The counter force is, by purpose, less than the closing force, so the check valve element remains closed. Nevertheless, the presence of the counter force reduces the overall sealing forces applied by check valve element, thereby reducing the magnitude of force which is ultimately required to unseat the check valve element.

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NGT LLC,MAC.RTM. Balanced Poppet 3-Way and 4-Way Air Valves, Undated.

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