Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent
1991-05-16
1992-06-02
Fox, John C.
Valves and valve actuation
With means to increase head and seat contact pressure
With positive reduction
251163, 251 84, F16K 1228
Patent
active
051180782
ABSTRACT:
A fully sealing butterfly valve throttles flow rates through a flow channel and completely ceases flow. A throttle plate rotates into a close position and then moves axially to seat against a seal. The axial movement directly corresponds to rotation of an actuator shaft to improve valve control for the entire range of throttle plate movement from a full open position to a seal position. Additionally, the present butterfly valve employs a self-centering throttle plate adapted to float within the valve central bore. The throttle plate adjusts its positioning about an annular seal to achieve an effective seal entirely around its circumference.
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Fox John C.
Tylan General, Inc.
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