Multistage variable area throttle valve

Details Multistage variable area throttle valve Multistage variable area throttle valve

1994-06-27

1995-05-16

Nilson, Robert G.

Fluid handling

Systems

Multi-way valve unit

13762533, 251334, 251902, F16K 136

Patent

active

054152020

ABSTRACT:
A throttle or fluid control valve uses at least one compressible multi-wave asher as a fluid control element. The apertures formed by the multi-wave washer are short and of low aspect ratio when the valve is fully open to limit pressure drop across the valve, thus substantially preventing cavitation and flow-related noise to high flow velocities. As the valve is closed, the aspect ratio of the apertures increases but surfaces of the apertures remain angled to each other to provide noise cancellation and damping. Several multi-wave washers spaced by sliders are preferably used to further limit pressure drop in any stage and to form a serpentine path in the general direction of flow to provide further noise cancellation and damping. The sliders also enhance the self-purging action of the valve structure. A closure structure is also provided for assuring full closure of the valve.

REFERENCES:
patent: 181288 (1876-08-01), Shaw
patent: 2369005 (1945-02-01), Anschicks
patent: 3717178 (1973-02-01), Allen
patent: 3920044 (1975-11-01), Gruner
patent: 4858644 (1989-08-01), Decker

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