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

• Current Assignee: Andrew Selep, Hales Corners, Walter J. Hartwig
• Original Assignee: Andrew Selep, Hales Corners, Walter J. Hartwig
• Inventors: Hartwig, Walter J., Selep, Andrew, Corners, Hales
• Primary Examiner(s): Rosenthal, Arnold
• Application Number:
  US05/353,207
• Time in Patent Office: 522 Days
• Field of Search: 137/375 251/368,302,301,326,327,328,329
• US Class Current: 137/375
• CPC Class Codes: F16K 3/312 Line blinds
• CPC Class Codes: F16L 59/147 the insulation being located inwardly of the outer surface of the pipe
• CPC Class Codes: F16L 59/16 Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
• CPC Class Codes: Y10T 137/7036 Jacketed

Abstract

There is provided in accordance with one embodiment of the invention a valve for use under high temperature conditions including a linearly slidable valve member made of silicon carbide and having a valve aperture therein which is slidably movable into or out of registry, or into varying degrees of registry with a fluid passage through the stationary valve bonnet. The slidable silicon carbide valve member cooperates with stationary valve seats in the stationary bonnet structure, which valve seats are also made of silicon carbide. The slidable valve member is guided in its sliding movement by channel-shaped guide members in the stationary bonnet, the guide members also being made of silicon carbide. The stationary valve bonnet in which the slidable valve member is mounted for sliding movement is provided with an outer metal housing of carbon steel or the like and a wall of thermally insulating refractory is interposed between the silicon carbide members (including the slidable valve element) and the metal housing to maintain the metal housing at a sufficiently low temperature to prevent thermal damage to the metal housing.

Claims

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.

2. A high temperature fluid flow control valve as defined in claim 1 in which said valve controls the flow of fluids having a temperature of the approximate order of magnitude of 2,000*-2, 200* Fahrenheit.

3. A high temperature fluid flow control valve as defined in claim 1 in which substantially the entire area of said movable valve gate is sandwiched between said stationary valve sections in all operating positions of said valve gate.

4. A high temperature fluid flow control valve as defined in claim 1 which is adapted to be used for controlling the flow of hot gas by-passed rom the preheat section of a Grate-Kiln system.

5. A high temperature fluid flow control valve comprising a pair of stationary valve sections positioned in axial alignment with each other, each of said stationary valve sections including a fluid flow passage therethrough in axial alignment with the fluid flow passage of the other of said stationary valve sections, a valve gate sandwiched between said stationary valve sections, said valve gate being pivotally movable relative to said stationary valve sections, metal casing means enclosing said valve, said valve gate having an aperture therein which is movable by pivotal movement of said valve gate into varying degrees of registry with said fluid flow passages of said stationary valve sections whereby said aligned fluid flow passages are 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, substantially all portions of said movable valve gate which are in direct contact with the high temperature fluid in any position of said movable valve gate being made of silicon carbide, each of said stationary valve sections comprising valve seat means formed of silicon carbide, said valve seat means of said stationary valve sections cooperating with said silicon carbide portions of said movable valve gate, the respective valve seat means being positioned at the interface between the fluid flow passage of each respective stationary valve section with the movable valve gate, and a thermally insulating material positioned in thermal insulating relation between said metal casing means and silicon carbide portions of said valve.

6. A high temperature fluid flow control valve as defined in claim 5 in which any portion of said movable valve section made of silicon carbide is embedded in a thermally insulating refractory material which is carried by said movable valve section.

7. A high temperature fluid flow control valve as defined in claim 5 which is adapted to be used for controlling the flow of hot gas by-passed from the preheat section of a Grate-Kiln system.

8. A high temperature fluid flow control valve as defined in claim 5 in which said thermally insulating material is a thermally insulating refractory.

9. A high temperature fluid flow control valve as defined in claim 5 in which said valve controls the flow of fluids having a temperature of the approximate order of magnitude of 2,000*-2, 200* Fahrenheit.

10. A high temperature fluid flow control valve as defined in claim 5 in which said valve is of the '"'"''"'"''"'"''"'"'goggle'"'"''"'"''"'"''"'"' type.

11. A high temperature fluid flow control valve comprising a pair of stationary valve sections positioned in axial alignment with each other, each of said stationary valve sections including a fluid flow passage therethrough in axial alignment with the fluid flow passage of the other of said stationary valve sections, a movable valve gate sandwiched between said stationary valve sections, metal casing means enclosing said valve, said valve gate having an aperture therein which is movable by movement of said valve gate into varying degrees of registry with said fluid flow passage of said stationary valve sections whereby said aligned fluid flow passages are 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, substantially all portions of said movable valve gate which are in direct contact with the high temperature fluid in any position of said movable valve gate being made of silicon carbide, each of said stationary valve sections comprising valve seat means formed of silicon carbide, said valve seat means of said stationary valve sections cooperating with said silicon carbide portions of said movable valve gate, the respective valve seat means being positioned at the interface between the fluid flow passage of each respective stationary valve section with the movable valve gate, and a thermally insulating material positioned in thermal insulating relation between said metal casing means and silicon carbide portions of said valve, any portion of said movable valve gate made of silicon carbide being embedded in a thermally insulating refractory material carried by said valve gate.

12. A high temperature fluid flow control valve as defined in claim 11 which is adapted to be used for controlling the flow of hot gas by-passed from the preheat section of a Grate-Kiln system.