SHUTOFF CONTROL VALVE Russian patent published in 2012 - IPC F16K3/26 F16K39/04 F16K47/02 

FIELD: machine building.

SUBSTANCE: proposed valve comprises body 1 with inlet 2 and outlet channels, control element with sleeve 3 to house piston 5 to reciprocate therein and to make valve plug. Sleeve 4 has, at least, two shaped holes 6 arranged in symmetry with sleeve edges. Body 1 comprises annular chamber 18 to cover said holes and communicate with inlet channel 2. Piston 5 is furnished with discharge channels 10. Valve plug is composed by piston end face surface 13 and tapered section of sleeve inner surface 8. In valve closed position, lower edge 14 of piston outer cylindrical surface 15 covers shaped holes 6 at distance L=(0.01-0.5)×D, where D is piston OD.

EFFECT: expanded operating performances, better reparability.

2 dwg