Satisfactory performance of any fluid piping system depends to a large extent upon efficient valve operation in controlling and regulating the flow of the fluids through the piping in which the valves

A ball supported in the valve body between the inlet and the outlet, and having an open position to conduct a fluid from the inlet to the outlet, and a closed position substantially preventing the flo

The present invention relates to a ball valve formed of a housing with inlet and outlet openings for a medium and a ball having a bore and floatingly supported in two rings in the housing. The ball in

The primary objective of the present invention is to provide a ball valve, which may prevent the fluid received in the valve seat. The secondary objective of the present invention is to provide a ball

In a lower kelly valve positioned beneath the kelly of a drill string connected to surface drilling equipment and mounted between an internally threaded lower tubular member defining a downstream flow

In a high pressure ball valve including a valve body having coaxially aligned inlet and outlet ports, a control chamber between said ports and a bonnet aligned with the control chamber.

A union-type ball valve comprising: a valve body having a fluid passage therethrough; at least one connecting sleeve having a flange portion at an end thereof and at least one union nut for releasably

A ball valve construction particularly suited for forming large diameter ball valves includes a main valve body formed from extruded plastic pipe and having a central through passage with a valve ball