气动薄膜切断阀，是气单元组合仪表的执行单元。具有结构简单、操作力大、体形小、重量轻、流阻小、阀容大、密封性能好、维修方便等优点。而广泛应用于石油、化工、冶金、电力、轻纺等生产过程中的自动化控制系统中。主要性能技术参数公称通径DN(mm)1520253240506580100125150200额定流量系数kv套筒1120304875120190300480760单座571120304875120190300480760三通额定行程(mm)81220254050允许泄漏量硬密封（L/H）套筒5×10-5阀额定容量单座、三通1.2×10-7×阀的额定容量软密封（ml/min）无介质温度℃-200～+200、-40～+450膜片有效面积（cm2）（薄膜式切断阀）1002004006001000公称压力PN(MPa)1.64.06.4允许压差（MPa）单座6.46.43.82.52.91.82.01.30.830.80.550.52套筒6.4信号压力KPa200（薄膜片）阀体Ht200ZG230-450\ZG1Cr18Ni9Ti阀塞套筒1Cr18Ni9TiCr18Ni12Mo2Ti阀芯、阀座1Cr18Ni9TiCr18Ni12Mo2Ti填料聚四乙烯柔性石墨可配附件空气过滤减压器、电磁阀、阀位回讯器等外形尺寸气动薄膜切断阀公称通径(mm)1520253240506580100125150200额定流量系数581217294370110165275440690A(mm)194230306394496L(mm)PN16150160180200230290310350400480600PN64230260300340380430500550650D(mm)PN1695105115140150165185200220250285340PN64105130140155170180205215250295345415H2(mm)325346360369477517540742822877气动薄膜三通切断阀公称通径(mm)20253240506580100125150200额定流量系数81217294370110165275440690H3(mm)398392404427443532558577728940995A(mm)194230306394496L(mm)PN16150160180200230290310350400480600PN64230260300340380430500550650D(mm)PN16105115140150165185200220250285340PN64130140155170180205215250295345415)