UNIVERSAL VALVE Russian patent published in 2014 - IPC F16K15/04 E21B34/06 

FIELD: oil-and-gas industry.

SUBSTANCE: proposed valve comprises valve unit arranged in hollow cylindrical body cushioned by threaded sleeve, shutoff ball arranged in valve unit groove, seat, spring and thrust with through holes. Thrust spherical end is located at initial position with guaranteed clearance relative to said ball. Blind lengthwise groove arranged regularly in circle are made in valve unit body wall. Two collars are made at valve body outer cylindrical surface and have circular grooves to receive split sleeves. The latter are arranged so that clearance exists between valve body central bores surface and body outer cylindrical surface. Circular groove for seals is made at threaded sleeve central through axial bore surface. Said seals are composed of two components, i.e. resilient element and two stiff split bearing rings. Working fluid passage with outlet is made inside aforesaid thrust. Spring is pre-compressed by force defined by working pressure and arranged in sealed chamber.

EFFECT: reliable, stable and efficient operation of valve and pump.

5 cl, 8 dwg