Apparatus and method for draining a viscous material from a vess

Details Apparatus and method for draining a viscous material from a vess Apparatus and method for draining a viscous material from a vess

1989-11-13

1990-05-22

Chambers, A. Michael

Fluid handling

Processes

Cleaning, repairing, or assembling

1373825, 137565, 222152, 417360, 251291, 251144, F16L 5518

Patent

active

049268945

ABSTRACT:
The invention is an apparatus and method for draining a viscous material, such as a molten polymer, from a vessel that contains the material. A ram-type valve is mounted on the outside of the vessel in line with a drain opening in the vessel. The valve is enclosed in a removable housing mounted on the outside of the vessel. During a process run, the valve piston closes off the drain opening, and an inert atmosphere inside the housing prevents oxygen from forming polymer "gels" that can plug the drain opening. When it becomes necessary to drain the vessel, a remote control valve actuator moves the valve piston out of the drain opening, so the polymer can flow out of the vessel.

REFERENCES:
patent: 2103797 (1937-12-01), Stoddard
patent: 2152956 (1939-04-01), Etzkorn
patent: 3472269 (1969-10-01), Scholle
patent: 4042207 (1977-08-01), Nehrlich et al.
patent: 4131219 (1978-12-01), Hind et al.
patent: 4273263 (1981-06-01), Voegele et al.
patent: 4435132 (1984-03-01), Haeshoop et al.
patent: 4834137 (1989-05-01), Kawaguchi et al.

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