| 摘要 |
<p>A flow control valve (1) having a pressure compensation function. This valve is free of fluid leakage and needs no pressure sensor. This valves includes a housing (2) having a first port (3) and a second port (4), a piston (5) axially slidably mounted in the housing (2), a valve body formed at one end of the piston (5), a first fluid chamber (13) defined between the other end of the piston (5) and the housing (2), a second fluid chamber (14) defined between the valve body and the housing, a variable-area orifice (5A) formed on the outer periphery of the piston (5) and adapted to close when the piston (5) is at a predetermined axial position, thereby shutting off the first fluid chamber (13) and the first port (3) from each other, a connecting path (12) formed in the piston (5) to communicate with the variable-area orifice (5A) and connecting the first fluid chamber (13) with the second fluid chamber (14) through a fixed-area orifice (15), an on-off valve (8) comprising the valve body (6) and a valve seat (7), a biasing means (9) biasing the on-off valve at all times in a direction to close the on-off valve, and an electromagnetic biasing means (11) for controlling the movement of the piston (5) toward the biasing means. <IMAGE></p> |
