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。该类型的阀一般具有较高的启闭率，内泄漏小，适用于高压力、大流量的液压系统。

When the pressure at "P" reaches the valve setting,the pilot spool starts to open,Next the main spool opening because of the pressure drop between inside and outside of main spool,Realize overflow from P to T. This type of valve generally has high opening and closing rate ,very low internal leakage, Suitable for the hydraulic system of high pressure and large flow.

1.额定压力(Rated pressure):195bar

2.额定流量(Rated flow):225L/min

3.开启率(Cracking Rate)≥88%

4.闭合率(Closing Rate)≥83%

5.补油开启压力(Oil make-up Cracking Pressure):19bar                         

6.内泄漏 (Internal Leakage) ≤60ml/min at 146bar

7.油液清洁度(Cleaning code):20/18/15(NAS9)

8.工作温度(Temperature range):-20~+100℃

9.每转压力变化(Pressure change per turn):83bar

10.安装扭矩(Installation Torque):45~50Nm

11.锁紧扭矩(Nut Tightening Torque):25~30Nm