FIELD: construction.
SUBSTANCE: invention relates to shutoff valves and can be used in wellhead production equipment manifold. Valve comprises hollow body with main component and dischargeable component supply branch pipes and main and dischargeable components mixture discharge branch pipe, in which is arranged with its crossing perpendicular to inner cavity axis, shutting-off device, having movable and stationary parts. At that, shutting-off device, opening or locking fluid (oil) cavity communication with annular space gas cavity, is made in form of spool with left-hand thread, which forms with seat inner cavity for screw insert with right-hand thread and additional seat-ball-spring shut-off element. Screw insert is equipped with diametrical longitudinal gas transmitting grooves and radial channels for automatic gas discharge.
EFFECT: technical result consists in improvement of wellhead valve reliability.
9 cl, 2 dwg
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