| 摘要 |
A valve device (1) including a fluid inlet (4), a fluid outlet (5), a valve seat (6), a valve member (3) movable relative to a valve seat (6), a control chamber (12), the volume of the chamber being variable depending on the position of said valve member (3), a fluid passageway (7) formed in said valve member (3), providing fluid communication between said fluid inlet (4) and said control chamber (12), a flow control element (8) provided in said fluid passageway (7) such that only a small flow rate is permitted to flow in said fluid passageway, a relief port (9) providing fluid communication between said control chamber (12) and either said fluid outlet (5) or an external outlet, and, a control means to control the position of said valve member (3), either directly or indirectly, and to thereby control the operating of said valve device (1), the control means including a plunger (2) selectively actuated by a solenoid (10). |
