當(dāng)P口壓力達(dá)到設(shè)定壓力后，先導(dǎo)閥芯首先被打開，由此產(chǎn)生的壓差使得主閥芯打開，P到T實(shí)現(xiàn)溢流。該類型的閥一般具有較高的啟閉率，內(nèi)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):200bar

2.額定流量(Rated flow):60L/min

3.開啟率(Cracking Rate)≥90%

4.閉合率(Closing Rate)≥85%

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

6.內(nèi)泄漏(Internal Leakage)≤3ml/min at 150bar

7.油液清潔度(Cleaning code):20/18/15(NAS9)

8.工作溫度(Temperature range):-20~+100℃

9.每轉(zhuǎn)壓力變化(Pressure change per turn):115.9bar

10.安裝扭矩(Installation Torque):40~45Nm

11.鎖緊扭矩(Nut Tightening Torque):10~12Nm