| 摘要 |
<p>A pressure proportional control valve comprises a valve body (3) having an input port (31), an output port (32) and an exhaust port (33); a valve means (4) arranged in the valve body (3) to control the communication with the ports; and an electromagnetic operation means (5) for driving the valve means (4). The valve means (4) has a first valve body (41) having a first valve potion (413) that comes in contact with a partitioning plate (36) arranged in a communication chamber (37) formed between the input port (31) and the output port (32), and a second valve body (42) having a valve portion (422) that comes in contact with the second valve portion (414). A diameter (D1) of the slide surface of the first seal (43), a diameter (D4) of a contact portion at which the first valve portion (413) of the first valve body (41) comes in contact with the seat portion (361) of the partitioning plate (36), and a diameter (D5) of a contact portion at which the valve portion (422) of the second valve body (42) comes in contact with the second valve portion (414) of the first valve body (41), are set to be equal. The diameter (D3) of the slide surface (421) of the second seal (44) is set to be larger than the diameter (D1) of the slide surface of the first seal (43). <IMAGE></p> |
