Fluid handling – Systems – Multi-way valve unit
Patent
1998-11-09
2000-02-15
Lee, Kevin
Fluid handling
Systems
Multi-way valve unit
251298, 251360, F16K 322
Patent
active
06024125&
ABSTRACT:
A rotary valve provides a casing have an inlet and an outlet and a shaft mounted plug that selectively covers the inlet. A seat ring having an inner seating shoulder that is eccentric relative to the body bore of the inlet is provided. The seat ring can be rotated to accommodate variations in the center of the plug for more accurate seating. The plug can be provided with a secondary plug that selectively covers the outlet and that moves relative to the outlet in response to movement of the shaft. The outlet can include a low noise structure having, in one embodiment, a set of tapered slots that vary the flow cross section along the flow path.
REFERENCES:
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patent: 3880191 (1975-04-01), Baumann
patent: 4073473 (1978-02-01), Rihm et al.
patent: 4085774 (1978-04-01), Baumann
patent: 4118008 (1978-10-01), Myers
patent: 4212321 (1980-07-01), Hulsey
patent: 4215846 (1980-08-01), Ishizuka et al.
patent: 4540025 (1985-09-01), Ledeen et al.
patent: 4667928 (1987-05-01), Davatz et al.
patent: 4973406 (1990-11-01), Ponzielli
patent: 5305987 (1994-04-01), Baumann
Baumann, H., "Coefficients and Factors Relating to Aerodynamic Sound Level Generated by Throttling Valves", Noise Control Engineering Journal, Jan.-Feb. 1984, pp. 6-11.
Fisher Controls International Inc.
Lee Kevin
LandOfFree
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