加载压力与卸荷压力的差值是卸荷溢流阀的重要性能指标，一般加载压力为卸荷压力的85%左右。其性能与溢流阀相同。
液压传动。减压阀、顺序阀、卸载阀、节流阀和止回阀。装配面。
Hydraulic fluid power - Pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves - Mounting surfaces.
空气处理单元APU，集干燥器、卸载阀、多回路保护阀的功能于一体，使整车管路简洁可靠；
Integrating the dryer, unloading valve and multi-circuit protective valve, the air processing unit (APU) makes the pipeline more compact and reliable.
该气压调节器用于自动控制气压制动系统的工作压力。它通过与松压阀共同作用，使空压机卸载。
The pressure regulator serve to automatically regulate the operating pressure in an braking system it can release the of compressor together with relief valve.
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