当P口压力达到设定压力后，先导阀芯首先被打开，由此产生的压差使得主阀芯打开，P到T实现溢流。该类型的阀从T到P始终关闭，反向可以承受较高的背压，适用于回油背压较大的液压系统。

When the pressure at"P"reaches the valvesetting,the pilot spool starts to open ,Next themain spool opening because of the pressure dropbetween inside and outside of main spool, Realizeoverflow from P to T. This type of valve alwayslocked from T to P, Reverse can withstand highback pressure Suitable for the hydraulic systemof high back pressure from T to P.

1.额定压力(Rated pressure):50bar

2.额定流量(Rated flow):20L/min

3.开启率(Cracking Rate)≥90%

4.闭合率(Closing Rate)≥80%

5.油液清洁度(Cleaning code):20/18/15(NAS9)

6.工作温度(Temperature range):-20~+100℃

7.每转压力变化(Pressure change per turn):46.4bar

8.安装扭矩(Installation Torque):38~43Nm

9.锁紧扭矩(Nut Tightening Torque):23~28Nm