Multi-purge gate valve for particulate solids flow

Details Multi-purge gate valve for particulate solids flow Multi-purge gate valve for particulate solids flow

1983-04-07

1985-08-20

Walton, George L.

Fluid handling

With cleaner, lubrication added to fluid or liquid sealing...

Cleaning or steam sterilizing

137334, 137375, 134166C, 222148, 251327, 251328, 251329, 406192, B08B 304, B08B 900

Patent

active

045358010

ABSTRACT:
A gate valve assembly for controlling flow of fine particulate solids, utilizing dual seating surfaces and a slidable gate which are either or both purged by an outflowing gas. The valve body is constructed in two split parts, and the body seat surface contains a conduit spaced outwardly from the seat and having a plurality of spaced openings oriented radially inwardly. The gate contains multiple passageways and is connected to a stem adapted for supplying a flow of pressurized purge gas to the passageways arranged to prevent deposits of the particulate solids passing therethrough on the valve seating surfaces. The valve is usually used for high temperature service, e.g. at 300.degree.-1000.degree. F., the valve body and gate are cooled by a vent gas, and the valve body is covered with thermal insulation material. The valve assembly is usually located within the lower end of an insulated container and controls the flow of particulate solids from the container.

REFERENCES:
patent: 691975 (1902-01-01), Schaaf
patent: 870487 (1907-11-01), Bertram
patent: 1995727 (1935-03-01), Wetherbee
patent: 2305724 (1942-12-01), Luetzelschwab
patent: 2630293 (1953-03-01), Smith
patent: 2631759 (1953-03-01), Hoopes
patent: 2705016 (1955-03-01), Saar
patent: 3150680 (1964-09-01), Becker et al.
patent: 3334653 (1967-08-01), Works et al.
patent: 3547140 (1970-12-01), Hastings et al.
patent: 4026324 (1977-05-01), King et al.

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