| 摘要 |
A proportional valve (10) for controlling an amount of pressurized fluid flowing into a pressurizable first chamber (12) from a pressurized fluid reservoir second chamber (18) and out from the first chamber (12) into an exhaust third chamber (20) includes an expandable closed chamber (22) formed with first (24) and second (26) disc plates connected to one another at a respective perimeter thereof. The two disc plates (24, 26) are axially slidably mounted on a support structure (30). The expandable chamber (22) is adapted to operate opening or closing of a fluid first passageway (34) between the first chamber (12) and the third chamber (20), and operate opening or closing of a fluid second passageway (36) between the first chamber (12) and the second chamber (18). A fluid flow passageway (31) extends through the first disc plate (24) in fluid communication with the closed chamber (22) for selective passage of a valve operating pressure fluid. |
