Ball valve seat and seal apparatus and assembly method

Details Ball valve seat and seal apparatus and assembly method Ball valve seat and seal apparatus and assembly method

1998-03-05

1999-05-18

Fox, John

Valves and valve actuation

Rotary valves

Ball valve

251317, F16K5/06

Patent

active

059043377

ABSTRACT:
A resilient cylindrical seat ring and pocket apparatus for supporting and sealing a valve ball in a valve body.
A method for creating and energizing a seal between an annular valve seat and a valve ball during the assembly of a valve apparatus. The valve body of the valve apparatus includes an annular valve body seat pocket. The annular valve seat is seated within the annular valve body seat pocket as the valve ball is positioned on an inner diameter corner of the annular valve seat. Next, the valve ball is forced on the inner diameter corner causing the inner diameter surface of annular valve seat to contact and conform to the valve ball. As a result, the inner diameter surface of the annular valve seat is sealed to the valve ball. The seal is energized from the resiliency of the annular valve seat. The seal is further energized from the interaction between the annular valve seat and the annular valve body seat pocket.

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