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實現溢流。該類型的閥從T到P始終關閉，反向可以承受較高的背壓，適用于回油背壓較大的液壓系統(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 always locked from T to P, Reverse can withstand high back pressure Suitable for the hydraulic system of high back pressure from T to P.

1.額定壓力(Rated pressure):50bar

2.額定流量(Rated flow):20L/min

3.開啟率(Cracking Rate)≥90%

4.閉合率(Closing Rate)≥80%

5.油液清潔度(Cleaning code):20/18/15(NAS9)

6.工作溫度(Temperature range):-20~+100℃

7.每轉壓力變化(Pressure change per turn):46.4bar                           

8.安裝扭矩(Installation Torque):38~43Nm

9.鎖緊扭矩(Nut Tightening Torque):23~28Nm