Importance

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Abstract

A shear valve assembly includes a stationary valve manifold having a manifold planar surface containing a plurality of manifold input ports and one or more manifold output ports, a movable valve switch having a switch planar surface in slidable, interactive contact with the manifold planar surface forming an interactive contact junction, the switch planar surface having a fluid switching channel capable of connecting one of the plurality of manifold input ports with one of the one or more manifold output ports, a surface modifying component disposed at the interactive contact junction that provides a period of extended useful life of the manifold planar surface and the switch planar surface beyond the useful life of pre-lubricated interactive contact junction, a drive shaft connected to the valve switch, and a valve housing supporting the stationary valve manifold, the movable valve switch, and the drive shaft.

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First Claim