UNIVERSAL CUT-OFF VALVE Russian patent published in 2004 - IPC

FIELD: pipeline multifunction fittings designed for working without readjustment in mode of non-return valve and also as cutting-off and cutting off - regulating organ in wide range of working parameters such as temperature and pressure values for different working fluids.

SUBSTANCE: universal cut off valve includes housing with seat and cover, rotating plate mounted in rotation axis and drive unit. Housing is fluid - tight one due to bellows built-in to it. One end of bellows is fixed; other end of bellows is joined with plate trough mechanical transmission and it is movable. There is gap between movable end of bellows and drive unit taken up at closing cut-off member. Effective surface area of bellows is less than surface area of sealing surface of cut-off member. Valve according to invention combines possibilities and advantages of different type fittings, for example shutter, rotary valve, cut off -regulating and non-return valve. It has minimum hydraulic resistance against flow of passed fluid, comparatively small working stroke of cut - off member for complete opening of flow-through cross section, does not need large efforts for controlling flow of working fluid and for providing fluid-tightness.

EFFECT: improved design, enlarged functional possibilities.

2 cl, 3 dwg