二、控制阀在完成同样职能的前提下,液压控制阀的数量越少越好;能用简单阀不用复杂阀,能用单级阀不用二级阀,能用工作位置较少的阀不用多位阀。换向阀的流量应该与液压缸完成规定速度所需的流量一样,压力应等于或大于系统的工作压力。单向阀的流量应等于流入相应液压缸 Second, the control valve to complete the same function on the premise, the smaller the better the number of hydraulic control valves; can use simple valves without complicated valves, can use single-stage valves without secondary valves, can use fewer valves in the working position not much Position valve. The flow of the reversing valve should be the same as the flow required by the hydraulic cylinder to complete the specified speed, and the pressure should be equal to or greater than the working pressure of the system. Check valve flow should equal to the corresponding hydraulic cylinder