Patent ID: 7370672
Filing Date: 2008-05-13
Classification: F16K,Y10T

Abstract:
1. A valve apparatus comprising: a) a shaft; b) a valve section comprising: a ceramic chamber housing; a ceramic mat material located externally to the chamber housing; a ceramic base adjoining the chamber housing to enclose a chamber; a shaft opening located through the chamber housing; a thermally insulating seal located between the shaft opening and the chamber housing; an inlet port located in the chamber housing; outlet ports located in the ceramic base; a rotatable ceramic plate located between the chamber housing and the ceramic base having at least one aperture and being rotatable by the shaft in order to move the aperture relative to the output ports and being rotatable by the shaft in order to self clean the rotatable ceramic plate by rotation about the ceramic base; and c) a valve actuation section comprising: at least one biasing device connected to the shaft; and cooling ports located in the valve actuation section for thermally cooling the valve actuation section and the biasing device.