Ball valve structure

Details Ball valve structure Ball valve structure

1986-12-18

1988-04-19

Chambers, A. Michael

Valves and valve actuation

With means to increase head and seat contact pressure

Separate actuators or actuator motion

251346, 166332, F16K 114

Patent

active

047384310

ABSTRACT:
Disclosed is an improved ball valve structure and a well safety valve utilizing the improved ball valve. The improved valve includes a metal seat member having a resilient section and control arms, which may be positioned to initially sealingly engage the seat with the ball and to compress the seat resilient section to control the force sealingly engaging the seat with the metal ball and thereby limit frictional forces opposing opening rotational forces when pushing on the seat to open the valve. The control arms are positioned by rings threaded on the seat above the control arms and below a shoulder in each arm. When the seat is moved down to open the ball valve, opening rotational forces are imparted to the valve ball through both the seat and control arms. The well safety valve utilizing the improved ball valve structure includes an annular metal valve and means increasing the force sealingly engaging the seat with the valve ball as pressure below the closed ball valve increases.

REFERENCES:
patent: 3583442 (1971-06-01), Dollison
patent: 4293038 (1981-10-01), Evans
patent: 4319634 (1982-03-01), McMahan et al.

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