THREE-WAY VALVE WITH PNEUMATIC ACTUATOR Russian patent published in 2014 - IPC F16K11/44 

FIELD: machine building.

SUBSTANCE: group of inventions refers to a three-way high pressure pneumatic valve. A device for control the fluid medium under high pressure comprises a casing fitted by the first, second and third ports which are selectively connected to each other streamwise through a control component. The said component is able of travelling between the first and the second reference positions for the selective direction of the fluid medium along the path between the first and the second ports or alternatively between the first and the third ports. The control component comprises the first tapered section formed opposite the first supporting surface and the second tapered section formed opposite the second supporting surface. At that the useful area of the first supporting surface is equal to the useful area of the first tapered section when the control component is in the first position. The useful area of the second supporting surface is equal to the useful area of the second tapered section when the control component is in the second position. Balancing of the control component is provided in that way. Versions of the device for fluid medium control are described.

EFFECT: control valve performs duties which are usually performed by two valves connected to each other.

25 cl, 12 dwg