| 摘要 |
The valve body comprises a piston(4) with an orifice at the center pressed by a spring(5) a separating plate(6) with a discharge port(7) and a suction port(8), a check valve(9) pressed by a spring(10) and the control plate(12) pressed by the spring (13) in the control hole(14). The gauge body(21) comprises check valve(19) pressed by a spring(20) and first and second pressure gauges (17,18) pressed by a spring(23). The warning terminals (17', 18') are connected to the gauge body(21) and pressed by the springs(23).
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