Plug valves are valves with cylindrical or conically-tapered "plugs" which can be rotated inside the valve body to control flow through the valve. The plugs in plug valves have one or more hollow pass

Valves or cocks with rotary plug in which the plug is provided with flexible gaskets of annular shape located symmetrically with respect to the plane passing through the axis of rotation of the plug a

A valve for controlling the flow of fluids of a flammable nature and under high pressure, which includes a hollow body having a plug rotatably mounted within the body between the floating seats at inl

The tapered plug of the valve is provided with two adjustments: three plug alignment set screws which properly position the plug to obtain a tight line seal and proper port alignment with the body por

A plug valve has an actuating stem which is non-integral with the valve plug. The actuating stem is axially movable with respect to the valve plug to compressingly and sealingly engage an external sea

A low-noise plug valve is formed with a plug in which one side wall of the plug is a grid defined by a plurality of small openings therethrough, which openings lead from the through passage of the plu

A plug valve includes a body having an interior wall and fluid passages therethrough with the interior wall having raised ridge portions thereon located in a selected pattern for cooperation with a re

There is a balanced plug valve with a contour shaped wall. The contour shaped wall forms a gap with an edge of a balanced plug. Fluid is able to flow through an input port, through the balanced plug,