A control valve for operating a fluid-actuated device includes a fluid inlet, a fluid outlet and a passage in fluid communication between the fluid inlet and the fluid outlet, the passage defining a longitudinal axis. A valve seat is disposed in the passage and includes an upstream diameter and a downstream...http://www.google.fr/patents/US7213612?utm_source=gb-gplus-shareBrevet US7213612 - High pressure ball-poppet control valve with flow control
High pressure ball-poppet control valve with flow control
