2W水用黄铜、不锈钢电磁阀里有密闭的腔，在不同位置开有通孔，每个孔都通向不同的油管，腔中间是阀，两面是两块电磁铁，哪面的磁铁线圈通电阀体就会被吸引到哪边，通过控制阀体的移动来档住或漏出不同的排油的孔，而进油孔是常开的，液压油就会进入不同的排油管，然后通过油的压力来推动油缸的活塞，活塞又带动活塞杆，活塞竿带动机械装置动。这样通过控制电磁铁的电流就控制了机械运动。2W water brass, stainless steel solenoid valve from the principle divided into three categories (ie: direct acting, step by step direct-acting, pilot), but the difference with the principles from the different valve configurations and materials on again is divided into six branches categories (direct-acting diaphragm structure, step by step re-sheet structure, the pilot membrane structure, direct-acting piston structure, step by step direct-acting piston structure, the pilot piston structure), is divided into two large ones in accordance with gas 2-way, two 3-way, two 4-way, 2 through 5.

Into a single electronically controlled solenoid valve and double solenoid, referring to the number of electromagnetic coils, single coil called a single solenoid, double coil is called double solenoid, two 2-way, two 3-way general When a single solenoid (single coil).