當P口壓力達到設定壓力后，先導閥芯首先被打開，由此產生的壓差使得主閥芯打開，P到T實現(xiàn)溢流。該類型的閥一般具有較高的啟閉率，內泄漏小，適用于高壓力、大流量的液壓系統(tǒng)。

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.額定壓力 (Rated pressure):175bar

2.額定流量(Rated flow):40L/min

3.開啟率(Cracking Rate):≥85%

4.閉合率(Closing Rate):≥80%

5.補油開啟壓力( Oil make-up Cracking Pressure):0.7bar                                                                                                                                                          

6.內泄漏(internal Leakage):≤2ml/min at 131bar

7.油液清潔度(Cleaning code):20/18/15(NAS9)

8.工作溫度(Temperature range):-20~+100℃

9.每轉壓力變化(Pressure change per turn):532bar

10.安裝扭矩(Installation Torque):45~50Nm

11.鎖緊扭矩(Nut Tightening Torque):35~40Nm