electric water valve normally closed is an actuator used in industrial process automation control system. It can automatically open or close after receiving the electronic control signal to realize on-off or flow regulation control of the fluid medium in the pipeline. Two-way direct-acting solenoid valves can be widely used in textile, printing, chemical industry, plastics, rubber, pharmaceuticals, food, building materials, machinery, electrical appliances, surface treatment and other production and scientific research departments, as well as bathroom, canteen, air-conditioning and other people's daily life facilities.