THERMOSHUTOFF VALVE Russian patent published in 2004 - IPC

FIELD: domestic and industrial gas appliances. SUBSTANCE: invention is designed for protection of gas supply systems in case of emergency, for instance, at fire. Proposed valve contains seat in form of flat plate with ring sealing surface from side of on-coming flow and shutoff with rod. Rod is spring-loaded and furnished with device holding shutoff in position open. Seat is provided with hub connected with plate by spokes. Through channel is made in one of spokes. Conical bore is made at outlet of plate through channel. Device holding shutoff open is made in form of stop engaging with shutoff rod. Stop is arranged in said channel and is furnished with thickening at end. Inner surface of thickening is made to form sealing pair with conical bore in plate. Cap with ports is secured on plate around conical bore. Stop is fixed in initial position by means of temperature-sensitive element. The latter is located inside cap. As a result, production expenses are reduced and mounting of thermoshutoff valve in operating pipeline is simplified owing to the fact valve has no housing and it can be secured directly in pipeline or clamped between its flanges. EFFECT: provision of shock-proofness. 3 cl, 3 dwg