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A hybrid butterfly valve has a stationary seat and a valve closure disk which may rotate together with an actuating shaft from the fully open position to a position wherein the disk is aligned with th

Cryogenic liquids may be stored and transported in double-walled Dewar containers having a vacuum between the two walls for insulation purposes. To draw that vacuum, a manually operated valve fitting

A single-ported double seated valve mechanism comprising valve body means having an inlet and outlet communicated by a flow passage and a chamber positioned within said flow passage, a valve bonnet se

In a single-ported double-seated valve mechanism having valve body means having an inlet and outlet communicated by a flow passage, a valve bonnet secured to said valve body means, a valve trim assemb

An actuator for opening and closing a globe valve. The globe valve has a stem through which positioning of the globe valve is achieved. The globe valve is normally biased to open position.

This application is directed to a valve apparatus, particularly, a valve apparatus including a deformable valve and valve seat within a fluid housing.

An actuator for opening and closing a globe valve. The globe valve has a stem through which positioning of the globe valve is achieved. The globe valve is normally biased to open position. The actuato