原理：通电时，电磁力把先导孔打开，上腔室压力迅速下降，在关 闭件周围形成上低下高的压差，流体压力推动关闭件向上移动，阀门打开；断电时，弹簧力把先导孔关闭，入口压力通过旁通孔迅速腔室在关阀件周围形成下低上高的压差，流体压力推动关闭件向下移动，关闭阀门。
SWH-G02-B2-D24-20 SWH-G02-B3-D24-20 SWH-G02-B2B-D24-20 SWH-G02-B3B-D24-20
SWH-G02-B8-D24-20 SWH-G02-B2L-D24-20 SWH-G02-B3L-D24-20 SWH-G02-B60B-D24-20
SWH-G02-D2-D24-20 SWH-G02-C2-D24-20 SWH-G02-C3-D24-20 SWH-G02-C4-D24-20
SWH-G02-C5-D24-20 SWH-G02-C6-D24-20 SWH-G02-C40-D24-20 SWH-G02-C60-D24-20
SWH-G02-C7-D24-20 SWH-G02-C8-D24-20 SWH-G02-C9-D24-20 SWH-G02-C10-D24-20
SWH-G02-C11-D24-20 SWH-G02-C12-D24-20 SWH-G02-C2BS-D24-20 SWH-G02-C2B-D24-20
SWH-G02-B2-A110-20 SWH-G02-B3-A110-20 SWH-G02-B2B-A110-20 SWH-G02-B3B-A110-20
SWH-G02-B8-A110-20 SWH-G02-B2L-A110-20 SWH-G02-B3L-A110-20 SWH-G02-B60B-A110-20
SWH-G02-D2-A110-20 SWH-G02-C2-A110-20 SWH-G02-C3-A110-20 SWH-G02-C4-A110-20
SWH-G02-C5-A110-20 SWH-G02-C6-A110-20 SWH-G02-C40-A110-20 SWH-G02-C60-A110-20
SWH-G02-C7-A110-20 SWH-G02-C8-A110-20 SWH-G02-C9-A110-20 SWH-G02-C10-A110-20
SWH-G02-C11-A110-20 SWH-G02-C12-A110-20 SWH-G02-C2BS-A110-20 SWH-G02-C2B-A110-20
