Prior to the present invention, GATE VALVES which included a gate intersecting a longitudinal flow path through the valve were generally know. It has been found that these Gate Valves and many other types of valves have not been suitable when working with high temperature materials. With convention valves and particularly conventional gate valves, when the valve is used for controlling the flow of high temperature material, the high temperature adversely affects the operation and sealing ability of the valve and very often destroys the valve. Merely using a valve constructed of material which is capable of withstanding high temperatures is not always satisfactory. It would be desirable to provide a cooled valve and the present invention has satisfied that desire. Cast Gate, Globe, Check Valves

The present invention was originally designed for use with cyclone separators. In cyclone separators, gas to be cleaned tangentially enters a housing and centrifugal force causes the particulate matter to flow downwardly towards a product outlet. Cleaned gas flows upwardly through the center of the housing towards a cleaned gas outlet. In order to insure proper operations of the separator, it is essential that a seal be formed between the bottom product discharge outlet and atmosphere. If this seal is broken, the dirty gas will flow from the inlet directly to the solids discharge and separation will not take place. It is common practice with separators of this type to provide a pair of cooperating swing gate valves. When one valve opens, the other is closed and the opening and closing of the valves alternates so that at no time is there communication between atmosphere and the cyclone through the product discharge outlet. Prior to the present invention, if the product being separated was at high temperature, the heat transferred to the valve would result in valve malfunction and destruction of the seal which must be maintained by the valves.

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