Solenoid valves are the core actuators of water treatment systems and are mainly responsible for the precise control of water flow and chemical media. In tap water purification, it is used to apply coagulants, disinfectants, etc. to ensure accurate dosage, with an error usually less than ±2%; in membrane treatment systems such as reverse osmosis, it is combined with pressure sensors to achieve automatic backwashing to prevent membrane element blockage; in sewage treatment, it controls the feed and discharge cycles of sludge dewatering equipment to improve solid-liquid separation efficiency.

Its advantages are rapid millisecond response, adaptability to water quality and flow fluctuations, and corrosion-resistant materials (such as 316 stainless steel and PTFE) that can adapt to acid, alkali and oxidizing media environments. By linking with PLC, SCADA system, flow meter and pH sensor, the entire process can be automated and closed-loop controlled to ensure that the effluent water quality meets the standards stably.