Patent ID: 8034284
Filing Date: 2011-10-11
Classification: C21B,F16K,Y10T

Abstract:
1. A bleeder valve for controlling a gas outflow from the interior of a pressurized furnace to the ambient atmosphere through an exhaust conduit, comprising: a valve seat associated with an exhaust conduit; a movable closure member having a central closure surface and a peripheral sealing surface cooperating with said valve seat, said closure surface comprising a convex surface at least in proximity to said sealing surface; and an actuating mechanism which is connected to said closure member for moving said closure member between a closed position on said valve seat and an open position distant from said valve seat; wherein said closure member comprises a recurved deflection portion at the periphery of said peripheral sealing surface, said recurved deflection portion comprising a deflection surface inclined against a tangent to said convex surface at the periphery of said convex surface by an angle in the range of 30° to 70° for imparting to a gas outflow passing between said valve seat and said closure member a velocity component which is opposite to the initial opening movement of said closure member.