Pressure control valve system - has control element moving against spring pressure and has two damping devices regulating control element movements

摘要

The valve has a body with inlet and a control element movable against a spring pressure between a normal closed position and a completely open position, with a nominal operating position between them. The inlet is connected to the outlet as soon as the control element has moved to the nominal operating position. A first damping device (19, 27) strongly damps the control element (13) movement, and becomes operative only when the control element reaches the nominal operating position. A second damping device (19, 17) applies a moderate damping when the control element moves from the nominal operating position in one or the other direction.