该类型的阀允许油液从①到②自由流动，反向则固定节流。

通过节流孔控制流量，实现执行元件所要求的运动速度。

This type of valve allows free flow from No.1 pool to No.2 pool

and fixed orifice for reverse direction. The flow can be 

controlled by orifice and to achieve the required motion speed

of the actuator.

技术参数：

1.额定压力(Rated pressure):250bar

2.额定流量(Rated flow):5L/min

3.油液清洁度(Cleaning code):20/18/15(NAS9)

4.工作温度(Temperature range):-20~+100℃

5.安装扭矩(Installation torque):25~30Nm