Apparatus and method for sealing dampers

Details Apparatus and method for sealing dampers Apparatus and method for sealing dampers

1976-08-02

1978-05-09

Rosenthal, Arnold

Fluid handling

Processes

251174, 251328, 138 943, F16K 3312, F16K 2500

Patent

active

040881466

ABSTRACT:
An apparatus and method for sealing a flow control apparatus, such as a damper, suitable for controlling the flow of fluids in a conduit, especially high temperature gases in flue ducts. The damper includes a closure member which may be removed entirely from the fluid stream by sliding movement through an aperture. Fixedly mounted, cooperating, flat, resilient strips seal the aperture in both the open and closed positions of the damper. Resilient support strips on both sides of the sealing strips control the resistance to flexure of the sealing strips. To prevent damage to the sealing strips as the closure member is withdrawn from the closed position, the sealing strips are allowed to buckle by moving from a condition of concave bending with respect to the interior of the fluid passageway to a condition of convex bending with respect thereto. The resistance to flexure of the sealing strips is controlled to ensure that the seals will not be opened by pressure or vacuum within the fluid passageway when the closure member is in the open position.

REFERENCES:
patent: 1054150 (1913-02-01), Thorsby
patent: 2732170 (1956-01-01), Shand
patent: 3206162 (1965-09-01), Bogot
patent: 3228389 (1966-01-01), Lowe et al.
patent: 3333816 (1967-08-01), Williams et al.
patent: 3504883 (1970-04-01), Beck
patent: 3698429 (1972-10-01), Lowe et al.
patent: 3738393 (1973-06-01), Alexandrov et al.
patent: 3799187 (1974-03-01), Armstrong

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