当P口压力上升到一定水平，由于阀芯内外的面积差使得该阀芯相当于阀座被打开，P到T开始溢流。因阀芯内外均为高压，打开的过程比较平缓，该结构具有多级开启功能，缓冲效果很好，一般成对用于回转马达。

When the pressure at "p" rises a certain level Due to the area difference between the inside and outside of the spool,It is opened relative to the valve seat, Starting to overflow from P to T,Because the spool inside and outside are high pressure both, the process of opening is relatively smooth,The structure has multi-level open function and excellent buffer effect ,Commonly used in pairs for rotary motors.

1.额定压力(Rated pressure):350bar

2.额定流量(Rated flow):60L/min

3.开启率(Cracking Rate) ≥85%

4.闭合率(Closing Rate)≥80%

5.内泄漏(Internal leakage)≤100ml/min at 262.5 bar                          

6.油液清洁度(Cleaning code):20/18/15(NAS9)

7.工作温度(Temperature range):-20~+100℃

8.安装扭矩(Installation Torque):35~40Nm