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

Plants and factories utilize process control devices to control the flow of fluids in processes, wherein