Abstract: A fluid control valve and method of making same are provided wherein such valve comprises a valve body structure having a fluid flow passage therethrough and a first sealing surface and a closure structure for controlling fluid flow through the passage with the closure structure having a second sealing surface adapted to engage the first sealing surface to shut off fluid flow through the valve and wherein such valves comprises a substantially annular heat exchange device comprising at least one of the structures and being disposed immediately adjacent the sealing surface thereof for controlling the temperature of at least one of the sealing surfaces.

Abstract: A fluid control valve and method of making same are provided wherein such valve comprises a valve body structure having a fluid flow passage therethrough and a first sealing surface and a closure structure for controlling fluid flow through the passage with the closure structure having a second sealing surface adapted to engage the first sealing surface to shut off fluid flow through the valve and wherein such valve comprises a substantially annular heat exchange device comprising at least one of the structures and being disposed immediately adjacent the sealing surface thereof for controlling the temperature of at least one of the sealing surfaces.

Abstract: An apparatus for moving a controlled member, as for example a valve, to a predetermined position in response to temperature conditions includes a bearing member which overcomes a force exerted by an energy storage device within a predetermined temperature range. The bearing member includes a fusible material which melts in another predetermined temperature range to enable the force exerted by the energy storage device to overcome the bearing member and to move the controlled member to a fail-safe position.