Valves and valve actuation – Rotary valves – Plug
Reexamination Certificate
2007-04-17
2007-04-17
Jacyna, J. Casimer (Department: 3754)
Valves and valve actuation
Rotary valves
Plug
Reexamination Certificate
active
10912944
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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Dallas L. Murray
McGuire Bob
Jacyna J. Casimer
Nelson Mullins Riley & Scarborough LLP
Stinger Wellhead Protection, Inc.
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