Choke valve

Details Choke valve Choke valve

1986-01-21

1987-01-27

Scott, Samuel

Fluid handling

With leakage or drip collecting

137375, 137551, F16K 134

Patent

active

046388338

ABSTRACT:
A flow line control valve is provided with internal erosion and corrosion trim liners and means for detecting for leaks in the liners. There is also provided fuller range, positive shutoff throttle means designed to reduce erosion and corrosion of the throttling parts and valve seat. The low flow rate throttling action is provided by progressive and accumulative flow through one or more stages of throttling flow passages of and by a nose end of the throttling means. Preferably the nose end is concavely tapered. Also preferably two or more stages of throttling spaced apart flow passages of increasing size are employed. Postive long lasting shut-off is assured by combining throttling and seat surfaces of different angles of taper.

REFERENCES:
patent: 2051509 (1936-08-01), Wile
patent: 2406243 (1946-08-01), Newton et al.
patent: 2426411 (1947-08-01), Peterson et al.
patent: 2507851 (1950-05-01), Bryant et al.
patent: 2792845 (1957-05-01), Atherton et al.
patent: 2822789 (1958-02-01), Philips et al.
patent: 3664634 (1972-05-01), Guertin et al.
patent: 4136709 (1979-01-01), Rogers et al.
patent: 4161187 (1979-07-01), Bauer
patent: 4461316 (1984-07-01), Cove et al.

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