2W水用黄铜、不锈钢电磁阀分为单电控和双电控，指的是电磁线圈的个数，单线圈的称为单电控，双线圈的称为双电控，2位2通，2位3通一般时是单电控（单线圈），

2W水用黄铜、不锈钢电磁阀从原理上分为三大类（即：直动式、分步直动式、先导式），而从阀瓣结构和材料上的不同与原理上的区别又分为六个分支小类（直动膜片结构、分步重片结构、先导膜式结构、直动活塞结构、分步直动活塞结构、先导活塞结构)，按照气路数分为2位2通，2位3通，2位4通，2位5通。

电磁阀分为单电控和双电控，指的是电磁线圈的个数，单线圈的称为单电控，双线圈的称为双电控，2位2通，2位3通一般时是单电控（单线圈），

2W water brass, stainless steel solenoid valve in a sealed chamber, at different locations with holes, each hole leads to a different pipeline, the middle chamber is a valve, both sides are two electromagnets, which face the magnet coil energizing the body to which side will be attracted to different file live or leaked oil discharge hole by controlling the movement of the valve body, and into the hole is always open, the hydraulic oil will enter a different outlet pipe, then through pressure oil cylinder to drive the piston, the piston and drive the piston rod drive mechanism moving. Thus by controlling the solenoid current is controlled mechanical movement.