Flow rate stabilizer for throttling valves

Details Flow rate stabilizer for throttling valves Flow rate stabilizer for throttling valves

1995-11-15

1998-06-16

Lee, Kevin

Valves and valve actuation

With material guide or restrictor

Baffle or zigzag flow restrictor

251118, 251359, F16K 4708

Patent

active

057658145

ABSTRACT:
A valve includes a fluid inlet passageway coupled to a fluid outlet passageway through an orifice and a valve plug which is moveable with respect to the orifice to vary the rate of fluid flow through the orifice. A seat ring is disposed at the orifice and includes a structural member extending into the fluid inlet passageway adjacent the orifice which prevents disturbances, such as intermittent vortices, from forming within the fluid in the fluid inlet passageway and which, thereby, provides a stable rate of fluid flow through the valve. The structural member may, alternatively, be connected to the valve plug or a wall of the fluid inlet passageway.

REFERENCES:
patent: 2524009 (1950-09-01), Dopp et al.
patent: 3776278 (1973-12-01), Allen
patent: 4326554 (1982-04-01), Gongwer
patent: 4506860 (1985-03-01), von Schwerdtner et al.
patent: 4960260 (1990-10-01), McEnearney
patent: 4986512 (1991-01-01), Tiefenthaler
patent: 5209259 (1993-05-01), Dear et al.
Fisher Controls Brochure, "Design EZ Sliding-Stem Control Valves," Fisher Controls, Bulletin 51.1:EZ, pp. 1-18 (Apr. 1994).
Fisher Controls Brochure, "For Economical and Accurate Control, Type 399A Makes It Easy," Form 8366, 16, pp., 1995.
Fisher Controls, Type 399 Easy Joe Valve spec. sheet, 1 pg.
Leslie Controls Brochure, "Aeroflow," 4 pp.
Two Fisher Controls Drawings Illustrating the Fisher Controls 4"-1500 HP Valve.

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