CPC F16K 5/225 (2013.01) [F16K 5/0442 (2013.01); F16K 5/0471 (2013.01)] | 20 Claims |
1. A plug valve assembly comprising:
a valve body having an inlet and an outlet each defining a fluid passageway in fluid communication with a cavity defined within the valve body;
a plug having a spindle top and having a plug body disposed within the cavity of the valve body and defining a through opening that, when the spindle top is rotated, the plug body rotates within the cavity and is operable to obstruct the fluid passageway when the plug body is in a closed position and operable to connect the fluid passageway of the inlet to the fluid passageway of the outlet when the plug body is in an open position;
a cap having threaded engagement with the valve body and operable to retain the plug within the valve body cavity;
a sleeve disposed at an interface between walls of the valve body cavity and the plug body, the sleeve including an inner surface having defined thereon a plurality of channels operable to distribute a lubricant around the plug body to facilitate rotational movement of the plug body within the valve body cavity; and
a grease port defined in the valve body in fluid communication with the channels defined on the sleeve,
wherein the sleeve comprises:
an inlet insert having an opening in alignment with the inlet fluid passageway;
an outlet insert having an opening in alignment with the outlet fluid passageway; and
first and second space plate inserts disposed between the inlet insert and the outlet insert.
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