①口无压力时，②口与③口相通，当①口压力上升到足以克服弹簧力，阀芯开始移动，②口与③口关闭。通过遥控，可用于系统的加载与卸荷。
When there is no pressure at port 1, port 2 is connected to port 3, The pressure at port 1 increases enough overcome the spring force, the spool begins to move, The valve closes between port 2 and port 3. By remote control, it can be used for loading and unloading the system.

1.最高压力(Pressure Max):350bar

2.最大流量(Flow Max):120L/min

3.切换压力(Pilot pressure):10±1bar

4.泄漏量(Internal leakage)≤100ml/min at 200 bar                            

5.油液清洁度(Cleaning code):20/18/15(NAS9)

6.工作温度(Temperature range):-20~+100℃

7.安装扭矩(Installation torque):60~65Nm