Disc assembly for a valve and method of making the same

摘要

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.

主权项

1. A method of making a disc assembly for shutoff or regulating valve having a valve body with a fluid passage therein, the fluid passageway having an internal surface, the disc assembly being pivotable within the fluid passage from an open position wherein the disc assembly is positioned within the fluid passage to provide for free flow of fluid through the fluid passage, to a closed position wherein the disc assembly is positioned within the fluid passage to substantially close off the fluid passage, the method comprising:
providing a front disc component; providing a rear disc component, one of the front disc component and the rear disc component having a recess located at the peripheral edge thereof, the other of the front disc component and the rear disc component comprising a confronting surface; juxtaposing the front disc component and the rear disc component adjacent each other to so that the recess and the confronting surface form an annular groove therebetween; providing a seal comprising a non-elastic polymeric member in the annular groove, whereupon only the non-elastic polymeric member is enabled to engage the internal surface of the fluid passageway when the disk assembly in the closed position, and wherein said seal comprises a spring energized PTFE seal; and permanently and inseparably securing the front disc component to the rear disc component to capture the seal with the groove prior to use.