DN25= DN25
NPS1=NPS1
如：Z型气动薄膜多级套筒调节阀，压力PN160，阀体材料为A105，公称通径DN50，型号为：ZJHD-160 DN50
ZJHD-16C-DN25,ZJHD-16C-DN50,ZHHD-16C-DN25,ZHHD-16C-DN50,
ZRHD-16C-DN25,ZRHD-16C-DN50,ZDHD-16C-DN25,ZDHD-16C-DN50,
ZJHG-16C-DN25,ZJHG-16C-DN50,ZHHG-16C-DN25,ZHHG-16C-DN50,
ZRHG-16C-DN25,ZRHG-16C-DN50,ZDHG-16C-DN25,ZDHG-16C-DN50,