截止阀的启闭件是塞形的阀瓣，密封面呈平面或锥面，阀瓣沿流体的中心线作直线运动。阀杆的运动形式，有升降杆式（阀杆升降，手轮不升降），也有升降旋转杆式（手轮与阀杆一起旋转升降，螺母设在阀体上）。截止阀只适用于全开和全关，不允许作调节和节流。电动法兰截止阀结构特点与用途1.可以安装在管道的任何位置上，介质从下往上流。2.不锈钢截止阀适用于各类腐蚀性介质的管道上，有良好的防腐性、足够的强度。3.合金钢截止阀适用于耐高温的蒸汽、油品管道上，具有耐高温特点.公称压力PressureClass试验压力Testpressure壳体Shell密封（水）Seat(water)密封（气）Seat(Air)上密封（水）BackSeat(water)1.62.41.80.61.8电动法兰截止阀公称压力1.6MPaDNLDD1D2bfZ-dHWeight50(DZW10I)2301601251001634-186454865(DZW10I)2901801451201834-186906080(DZW10)3101951601352038-1871565100(DZW15)3502151801552038-1877071125(DZW20)4002452101852238-18780119150(DZW30)4802802402102438-23810231200(DZW45)60033529526526312-23967320250(DZW60)65040535532030312-251143550300(DZW90)75046041037530312-251292785电动法兰截止阀公称压力PressureClass试验压力Testpressure壳体Shell密封（水）Seat(water)密封（气）Seat(Air)上密封（水）BackSeat(water)2.53.82.80.62.8电动法兰截止阀公称压力2.5MPaDNLDD1D2bfZ-dHWeight50(DZW10I)2301601251002034-186455065(DZW10I)2901801451202238-186906280(DZW15)3101951601352238-1871567100(DZW20)3502301901602438-2377073125(DZW30)4002702201882838-25780127150(DZW45)4803002502183038-25875215200(DZW60)60036031027834312-25967322250(DZW90)65042567033236312-301153585300(DZW120)75048543039040416-301292795电动法兰截止阀公称压力PressureClass试验压力Testpressure壳体Shell密封（水）Seat(water)密封（气）Seat(Air)上密封（水）BackSeat(water)4.06.04.40.64.4电动法兰截止阀公称压力4.0MPaDNLDD1D2D6bf2fZ-dHWeight50(DZW10I)2301601251008820434-186456165(DZW10I)29018014512011022438-186907580(DZW20I)31019516013512122438-1871584100(DZW30)350230190160150244.538-23770101125(DZW45)400270220188176284.538-25782207150(DZW60)480300250218204304.538-25875226200(DZW90I)600375320282260384.5312-301160339)