DJQ系列型低温紧急切断阀DJQelectroemergencycut-offvalveatlowtemperature此类型专用低温紧急切断阀适用于低温贮槽上切断流通介质，特别是在出现火情故障时能及时切断介质。广泛用于LNG、液态乙烯及其它低温介质，具有体积小、重量轻、密封可靠、紧急切断迅速可靠和防静电的特点。Thistypeisspecialemergencycut-offvalveissuitableforlowtemperaturestoragetankatlowtemperatureoncutoffcirculationmedium,especiallyintheeventofafirefailurecanpromptlycutoffthemedium.WidelyusedinLNG,ethyleneandotherlowtemperatureliquidmedium,has***allvolume,lightweight,reliablesealing,reliableemergencystopquicklyandanti-staticcharacteristics.主要技术参数Maintechnicalparameters公称压力/Nominalpressure:4.0MPa设计温度/Designtemperature:-196℃～+70℃适用介质/Applicablemedium:LNG、LO2、LN2、LAr连接方式/Connectionmethod:插焊公称通径/Nominaldiameter:25mm~50mm强度试验压力/Strengthtestpressure：4.0MPa气密性试验压力/Airtightnesstestpressure:1.6MPa方向密封试验压力/directionofsealtestpressure:0.4MPa气缸气源压力/Airpressurecylinder:0.4～0.6MPa紧急切断温度/Emergencycut-offtemperature:+70℃紧急切断时间/Emergencycut-offtime:<2秒主要零部件名称Maincomponentsname材料Materials阀体/ValvebodyZG0Cr18Ni9阀瓣/Valvedisc0Cr18Ni9Ti阀盖/ValvecoverZG0Cr18Ni9阀杆/Valvestem0Cr18Ni9主密封件/MainsealPTFE或PCTFE气缸/cylinder铸铝支架/stents铸铝)