Valves and valve actuation – With material guide or restrictor
Patent
1994-06-21
1996-01-09
Schwadron, Martin P.
Valves and valve actuation
With material guide or restrictor
251174, 138 44, F16K 4702
Patent
active
054822491
ABSTRACT:
A dynamic seal is provided between a rotatable ball control member and a noise attenuator in a fluid control valve. In one embodiment a noise attenuator is rigidly clamped in the valve body and a floating, spring biased seal is provided in the attenuator and facing the ball. A bi-directional fluid control valve is provided with two rigidly mounted noise attenuators each having a floating, spring biased ball seal. In a second embodiment a noise attenuator is floating, spring biased towards the ball and includes an annular seal retained in the attenuator. Pressure balancing the fluid flow pressure and the spring bias enables substantially zero seal engagement with the ball during ball rotation, while enabling a reliable seal of the ball in the shut-off valve position.
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.COPYRGT.Fisher Controls 1990, 1991, Drawing No. 42B4651, "Size 2-12, Design V300, Vee-Ball Valve Assembly".
Brochure, Grove Incorporated, "Grove Ranger", pp. 2-5.
Kuhlman Charles R.
Schafbuch Paul J.
Fisher Controls International Inc.
Lee Kevin L.
Schwadron Martin P.
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