1、单闸板闸阀：公称直径阀体长度（㎜）PN1.xMPaPN1.xMPaPN2.xMPaPN4.xMPaxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx2、双闸板闸阀（PN1.xMpa）：DNxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx阀体长度xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx3、截止阀（包括柱塞截止阀）公称直径DN阀体长度（㎜）公称压力（Mpa）1.x2.x4.x6.x10.xxx注①xxxxxxxxxxxxxxxxx注②xxxxxxxx...
