FIELD: valves and accessories.
SUBSTANCE: set of invention relates to valves and accessories and serves to allow working medium flow in one direction and to shut it off in opposite direction. The shut-off valve comprises the body with central and outer parts and dome-like flexible membrane. The latter comprises the central part, outer edge, multiple relatively thick sections and multiple relatively thin sections. Central part of aforesaid membrane is connected with the central part of the body. Relatively thick sections are located, at least, partially between the membrane central part and its outer edge. Relatively thin sections are located, at least, partially between the flexible membrane central part and its outer edge. Invention covers designs of aforesaid shut-off valve.
EFFECT: higher reliability.
19 cl, 16 dwg
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