FIELD: machine building.
SUBSTANCE: axisymmetric check valve with an upper flanged joint comprises a cylindrical body with inlet and outlet nozzles, the upper flanged joint with a bore, in which a sealing element is installed for sealing of the body-cover joint, and also a detachable seat. In the cover a fairing is rigidly fixed with the stop unit placed inside. A process channel is made in the cover. Between the body and the cover, and also between the cover and the threaded plug there are tight closed circuits with channels of control of tightness of detachable joints. Channels are closed with plugs having similar threads with press oilers.
EFFECT: higher reliability and tightness during entire service life of valve operation, for provision of its repairability without cutting from a pipeline, for realisation of continuous control of tightness of detachable joints of a valve and position of its stop element.
3 dwg
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