Valves and valve actuation – Rotary valves – Plug
Patent
1991-07-23
1992-10-13
Fox, John C.
Valves and valve actuation
Rotary valves
Plug
137 681, F16K 504
Patent
active
051543966
ABSTRACT:
A polyethylene plastic valve has a molded cylindrical body portion with an internal chamber with inlet and outlet openings. A unitary plastic plug member is rotatably positioned in the chamber. The plug member has an actuator portion formed of impact resistant plastic material, and a plug portion formed of dimensionally rigid plastic material with a flow passage therethrough. The plug member has open and closed positions. Dual durometer valve seats are positioned on the plug member to close the inlet and outlet openings in the valve body. The actuator portion of the plug member extends upwardly through the chamber and seals the internal chamber at the top by means of a circumferentially extending flange portion. A bottom cover plate is fused to and seals the lower end of the internal chamber. The bottom cover is arranged to disengage from the valve body and relieve excess pressure build up in the lower end of the chamber. The valve body is molded around a cylindrical metal reinforcing member having openings aligned with inlet and outlet openings in the valve body and has a plurality of other apertures which permit the plastic of the valve body to flow therethrough and connect the plastic on opposite sides of the reinforcing member.
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Brunetto, Jr. Sam A.
Conley Richard W.
Daniels James R.
Tremblay Richard P.
Fox John C.
Kerotest Manufacturing Corp.
Price, Jr,. Stanley J.
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