闸阀是最常用的截断阀之一，主要用来接通或截断管路中的介质，不适用于调节介质流量。闸阀适用的压力、温度及口径范围很大，尤其适用于中、大口径的管道。闸阀的主要优点：（1）流体阻力小。闸阀闸体内部介质通道是直通的，介质流经闸阀时不改变其流动方向，因而流动阻力较小。（2）启闭较省力。启闭时闸板运动方向与介质流动方向相垂直。与截止阀相比，闸阀的启闭较为省力。（3）介质流动方向一般不受限制。介质可从闸阀两侧任意方向流过，均能达到接通或截断的目的。便于安装，适用于介质的流动方向可能改变的管路中。主要零件材料及性能规范主要零部件阀体、阀盖、闸板WCBZG1Cr18Ni9TiZG1Cr18Ni12Mo2Ti0Cr18Ni12Mo2TiZG2Cr5Mo阀杆1Cr131Cr18Ni9Ti20Cr1Mo1V1阀杆螺母ZguAL10Fe3/球墨铸铁填料柔性石墨、石墨石棉盘根主要参数适用介质蒸汽、油品、水等硝酸类醋酸类蒸汽、油品、水等适用适用温度℃≤425≤200≤200≤425型号公称主要结构尺寸(mm)阀体材料性能规格通径        DN(mm)压力         PN(MPa)DD0LH1H2适用温度(℃)适用介质Z41H -16CZ41H-16PZ41H-16R501.6160200250185240C:碳钢P:1Cr18Ni9TiR:0Cr18Ni12Mo2TiC≤425P≤200R≤200C:蒸汽、油品、水等P:硝酸类R:醋酸类65"1802002702402080"195250280350395100"215250300370480150"280300350560720200"335350400735955250"4054004508801150300"46045050010501375350"52050055011951565400"58055060013351760500"70560070017202270600"84065080018302480700"910700900  Z41H-25Z41H-25PZ41H-25R502.5160200250185240C:碳钢P:1Cr18Ni9TiR:0Cr18Ni12Mo2TiC≤425P≤200R≤200C:蒸汽、油品、水等P:硝酸类R:醋酸类65"18020027024032080"195250280305395100"230250300370480150"300300350560720200"360360400735955250"4254254508801160300"48548550010801405350"55055055012101580400"61061060013451780500"73073070017402290600"84065080018502500700"955700900  Z41H-40Z41H-40PZ41H-40R504.0160250250220295C:碳钢P:1Cr18Ni9TiR:0Cr18Ni12Mo2TiC≤425P≤200R≤200C:蒸汽、油品、水等P:硝酸类R:醋酸类65"18025028029036580"195300310360450100"230300350450570150"300350450620790200"3754005508301050250"4454506509501235300"51050075011201450350"57055085015601940400"65560095017702200500"755680105018802320Z41H-64Z41H-64PZ41H-64R506.4175300250240320C:碳钢P:1Cr18Ni9TiR:0Cr18Ni12Mo2TiC≤425P≤200R≤200C:蒸汽、油品、水等P:硝酸类R:醋酸类65"20030028031039080"210350310380470100"250350350470590150"340400450640810200"4054505508501070250"47050065010001270300"53055075012101550Z41H-100Z41H-100PZ41H-100R5010.0195300 ,250260340C:碳钢P:1Cr18Ni9TiR:0Cr18Ni12Mo2TiC≤425P≤200R≤200C:蒸汽、油品、水等P:硝酸类R:醋酸类注：法兰尺寸标准按JB/T79-1994。