Gate valve having expanding gate and floating seats

Details Gate valve having expanding gate and floating seats Gate valve having expanding gate and floating seats

1991-12-09

1993-05-18

Fox, John C.

Valves and valve actuation

With means to increase head and seat contact pressure

Gate valve

251328, F16K 316

Patent

active

052113736

ABSTRACT:
An expanding gate valve having replaceable valve seats that are capable of longer operating life than conventional valve seats. The valve seats of the present invention have sealing faces that are case hardened to a hardness of about Rockwell 60 C and are devoid of resilient sealing rings in the sealing faces. Additionally, the seats are of floating construction, and are adapted to move both axially and to tilt relative to the seat recesses that are provided in the valve body. Finally, a resilient biasing arrangement is provided at the rear portion of the seat to bias it outwardly relative to the seat recesses to insure substantially complete surface engagement between the sealing face of the seat ring and the face of the respective gate surface.

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W-K-M Joy information sheets relating to "POW-R-SEAL (Model M) and WP SAF-T-SEAL" Gate valves.
Seaboard WEllhead, Inc. Valve information sheet.
Inson Gate Valve information sheet.
Barton Valve Company, Inc. Gate Valve Cutaway.
BCF Series G-2 Gate Valve information sheet.

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