FIELD: shutoff fittings of pipelines, namely closing pipelines used, mainly in gas-oil industry branch, heat power engineering and in public utilities. SUBSTANCE: diaphragm type valve includes housing having inlet and outlet branch pipes and seat; lid with threaded hole; spindle and diaphragm. The last has fluid-tight cavity arranged in its central portion and matched with seat dimensions. Said cavity is filled under atmospheric pressure with liquid or elastic shock absorbing or gaseous fluid and it is sealed. EFFECT: increased useful life period, improved operational reliability of valve. 1 dwg
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