US Patent 10215295 Valve for a reciprocating compressor

A valve for a reciprocating compressor comprises a valve body having a seat and a guard; a shutter element placed between the seat and the guard and configured to move between a closed position in which the passage of fluid is prevented and an open position in which the passage of fluid is allowed; an hydraulic apparatus for moving the shutter element between the open and closed positions, the hydraulic apparatus comprising an hydraulic circuit having at least a portion integrated in the valve body.