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						  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(kāi),
					 
						
							由此產(chǎn)生的壓差使得主閥芯打開(kāi),P到丅實(shí)現(xiàn)溢流。
						 
							該類型的閥反向可以承受一定的背壓,啟閉率較高,
						 
							適用于高壓力、大流量的液壓系統(tǒng)。
						When the pressure at "P"reaches the valvesetting,
					 
						the pilot spool starts to open , Next the main spool 
					 
						opening because of the pressure drop between inside 
					 
						and outside of main spool, Realizeoverflow from P fo T. 
					 
						This type of valve can withstand a certain amount of 
					 
						back pressure,has high opening and closing rate 
					 
						Suitable for the hydraulic system of high pressure and
					 
						 large flow
					 
						
 
						   
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						1、額定壓力(Rafed pressure):200bar
					 
						2、額定流量(Rated flow):60L/min
					 
						3、開(kāi)啟率(Cracking Rate) >90%
					 
						4、閉合率(Closing Rate)>87.5%
					 
						5、油液清潔度(Cleanling code):20/18/15(NAS9)
					 
						6、工作溫度(Temperature range):-20~+100℃
					 
						7、每轉(zhuǎn)壓力變化(Pressure change per turn):170ban
					 
						8、安裝扭矩(lsfallation Torque):40~45Nm
					 
						9、鎖緊扭矩(Nut Tightening Torque):23~28Nm
					 
						 
					 
						 
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