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HIGH TEMPERATURE VALVE

  • US 3,837,356 A
  • Filed: 04/20/1973
  • Issued: 09/24/1974
  • Est. Priority Date: 04/20/1973
  • Status: Expired due to Term
First Claim
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1. A high temperature fluid flow control valve comprising a pair of stationary valve sections positioned in axial alignment with each other, a metal casing enclosing the external surface of each of said valve sections, a movable valve gate sandwiched between said stationary valve sections and mounted for pivotal movement relative to said stationary valve sections, a metal casing enclosing the outer periphery of said valve gate, said stationary valve sections each being of '"'"''"'"''"'"''"'"'goggle'"'"''"'"''"'"''"'"' shape at least at the interface with said valve gate, said '"'"''"'"''"'"''"'"'goggle'"'"''"'"''"'"''"'"' shape including a central area and oppositely disposed arcuate lobes symmetrically located on either side of said central area and terminating at a common junction, the pivotal axis of said valve gate being located at said common junction, a fluid flow passage extending through the central area of each stationary valve section, said movable valve gate comprising an aperture movable by pivotal movement of said valve gate into varying degrees of registry with said fluid flow passage of said aligned stationary valve sections whereby said fluid flow passage is either entirely open to flow of fluid therethrough, or entirely closed to flow of fluid therethrough, or partially open and partially closed to flow of fluid therethrough, at least the portions of said movable gate which are in direct contact with the high temperature fluid in any position of said movable valve gate being made of silicon carbide, at least all silicon carbide portions of said movable valve gate being sandwiched within the outer peripheral boundaries of said stationary valve sections in all operating positions of said valve gate, each stationary valve section comprising valve seat means formed of silicon carbide and located at the interface between said fluid flow passage and said valve gate, said valve seat means being adapted to cooperate with said movable valve gate, a thermally insulating refractory material positioned in thermally insulating relation between the metal casing of each respective stationary valve section and the silicon carbide valve seats of the respective stationary valve sections, and a thermally insulating refractory material positioned in thermally insulating relation between the metal casing of said valve gate and the silicon carbide portions of said valve gate.

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