原理：它是一種直動和先導式相結合的原理，當入口與出口沒有壓差時，通電后，電磁力直接把先導小閥和主閥關閉件依次向上提起，閥門打開。當入口與出口達到啟動壓差時，通電后，電磁力先導小閥，

臺灣JianHui電磁閥部分型號如下：

10通經(jīng)G03

DWH-G03-C2-D24-20,DWH-G03-C4-D24-20,DWH-G03-C6-D24-20,DWH-G03-C60-D24-20,

DWH-G03-C2-ADWH-G03-C4-ADWH-G03-C6-ADWH-G03-C60-A240-20

DWH-G03-C2-ADWH-G03-C4-ADWH-G03-C6-ADWH-G03-C60-A

DWH-G03-C2-ADWH-G03-C4-ADWH-G03-C6-ADWH-G03-C60-A120-20

DWH-G03-C2-ADWH-G03-C4-A110-20 DWH-G03-C6-ADWH-G03-C60-A110-20

DWH-G02-C2-ADWH-G02-C4-ADWH-G02-C6-ADWH-G02-C60-A110-10

DWH-G03-C2-D24-10,DWH-G03-C4-D24-10,DWH-G03-C6-D24-10,DWH-G03-C60-D24-10,

DWH-G03-C2-ADWH-G03-C4-ADWH-G03-C6-ADWH-G03-C60-A240-10

DWH-G03-C2-ADWH-G03-C4-ADWH-G03-C6-ADWH-G03-C60-A220-10

DWH-G03-C2-ADWH-G03-C4-ADWH-G03-C6-ADWH-G03-C60-A120-10

DWH-G03-C2-ADWH-G03-C4-ADWH-G03-C6-ADWH-G03-C60-A110-10