Abstract: An engine shutoff valve is provided which includes a valve body having an air passageway in which a disc assembly and a valve seat assembly are located. The disc assembly includes a disc member which is arranged to be rotated and moved toward the valve seat assembly upon the occurrence of an engine runaway condition to close the valve. The valve seat assembly includes an anti-friction ring which is arranged to be engaged by the disc member when the valve is closed. The anti-friction ring is rotatable with respect to the valve body and the disc member to prevent the disc member from sticking thereto after closure of the valve, whereupon the valve can be readily reopened.

Abstract: An engine shutoff valve is provided which includes a valve body having an air passageway in which a disc assembly and a valve seat assembly are located. The disc assembly includes a disc member which is arranged to be rotated and moved toward the valve seat assembly upon the occurrence of an engine runaway condition to close the valve. The valve seat assembly includes an anti-friction ring which is arranged to be engaged by the disc member when the valve is closed. The anti-friction ring is rotatable with respect to the valve body and the disc member to prevent the disc member from sticking thereto after closure of the valve, whereupon the valve can be readily reopened.

Abstract: A shutoff valve, e.g., an engine shutoff valve, is provided which includes a valve body having a fluid, e.g., air, passage and a disc assembly. The disc assembly is pivotable within the fluid passage from an open position to provide for free flow of fluid through the passage, to a closed position to provide a substantially closed off the fluid passage. The disc assembly includes a front disc, a rear disc, and a seal, e.g., a spring energized PTFE seal, disposed between the front disc and the rear disc. The front disc is permanently secured, e.g., welded, soldered or brazed, to the rear disc such that the seal is captured between the front disc and the rear disc.

Abstract: A shutoff valve, e.g., an engine shutoff valve, is provided which includes a valve body having a fluid, e.g., air, passage and a disc assembly. The disc assembly is pivotable within the fluid passage from an open position to provide for free flow of fluid through the passage, to a closed position to provide a substantially closed off the fluid passage. The disc assembly includes a front disc, a rear disc, and a seal, e.g., a spring energized PTFE seal, disposed between the front disc and the rear disc. The front disc is permanently secured, e.g., welded, soldered or brazed, to the rear disc such that the seal is captured between the front disc and the rear disc.