Valve for furnace stack pipe

F - Mech Eng,Light,Heat,Weapons – 23 – L

Patent

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126/90, 126/91

F23L 13/00 (2006.01) F23L 3/00 (2006.01) F23L 11/02 (2006.01) F23L 13/02 (2006.01) F23L 13/06 (2006.01)

Patent

CA 1175721

Abstract of the Disclosure A valve is provided for installation in the auxillary duct of a furnace stack pipe. The valve prevents flow of air through the damper plate in the auxillary duct when the furnace is switched off. The valve is controlled by a temperature responsive bimetallic strip which is impinged upon by flue gases to move the valve to an open position upon the furnace being ignited and producing combustion gases.

402529

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