VALVE Russian patent published in 2009 - IPC F16K3/24 

FIELD: machine building.

SUBSTANCE: invention is provided for control of flow of actuating medium in pipelines, mainly of high pressure at high consumptions of actuating medium. Valve contains casing with inlet and outlet holes, valve seat, cylindrical bush with openings, taking-out part. The latter consists of two similar accordion boots co-axial installed relative to casing of taking-out part and sequentially one-by-one, waterproof connected to each other by threaded bush through end pieces of accordion boots, one of which is plunger with thickening surface. For the purpose of creation of valve construction with expanded modes and operation parametres with high reliability at all conditions of operation, bush is installed between casing of taking-out part and saddle, providing axial direction of plunger at its movement by internal radial surface of bush. Plug is implemented in the form of elongated sleeve installed co-axial inside accordion boots. Top end of sleeve is immovable connected to installed flange which in turn hermetically connected to casing of taking-out part. Immovable connection of rod end of drive with threaded bush is provided by connection element for movement of which in sleeve there are implemented grooving. Grooves length is more than length of plunger move.

EFFECT: higher reliability and durability of valve operation.

1 cl, 1 dwg