High-pressure plug valve

Details High-pressure plug valve High-pressure plug valve

2011-05-24

2011-05-24

Fristoe, Jr., John K (Department: 3753)

Valves and valve actuation

Rotary valves

Plug

C251S304000

Reexamination Certificate

active

07946558

ABSTRACT:
A plug valve has a valve body, a cage fitted within the valve body and a rotatable plug housed within a cylindrical cavity in the cage, for controlling fluid flow through the valve. The cage has first and second opposed flat side surfaces, each side surface has a port for receiving a replaceable flow-path insert in a fluid-tight seal. In one embodiment, the plug also includes at least one inset seal for sealing the at least one of the ports when the plug is in a closed position to inhibit leakage through the valve at low fluid pressures.

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