CROSS-OVER BLOW VALVE Russian patent published in 2010 - IPC F16K17/36 F16K24/04 B60K15/35 

FIELD: machine building.

SUBSTANCE: cross-over blow valve includes body equipped with inlet hole for fluid medium and outlet hole for fluid medium, valve seat restricting the body outlet hole, floating element arranged in the body and moved in axial direction between closed position and open position. In closed position the closing element is tightly borne against the valve seat of the body outlet hole to close the fluid medium outlet hole. In open position the closing element is detached from the valve seat. Fluid medium outlet hole is interconnected via flow to fluid medium inlet hole. There is pressure keeping device located between valve seat and outlet fluid medium hole, which has the possibility of closing the fluid medium flow until pressure difference between inlet fluid medium hole and outlet fluid medium hole does not exceed minimum threshold value. There is also single-action fluid medium inlet valve interconnected via flow to outlet flow medium hole, having the possibility, in case of reduced pressure in the area of inlet fluid medium hole, of passage of fluid medium flow of considerably high intensity in the direction towards the above inlet fluid medium hole.

EFFECT: improving operating reliability owing to using the pressure keeping device.

10 cl, 5 dwg