F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
251/73
F16K 3/00 (2006.01) F16K 3/312 (2006.01) F16K 25/00 (2006.01)
Patent
CA 1054127
ABSTRACT OF THE DISCLOSURE: 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 steam 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 streips control the resistance to flexure of the sealing strips. The sealing strips include means for effecting buckling thereof to change the sealing stripsfrom a condition of concave bending with respect to the interior of the fluid passageway to a condition of convex bending with respect thereto whereby damage to the sealing strips is preven- ed. The resistance to flexure of the sealing strips is control- led 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.
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