A solenoid valve is an electromechanical device that controls the flow of liquids or gases in a system by using an electric current to generate a magnetic field, which actuates a plunger to open or close the valve. This mechanism allows for precise control of fluid flow in various applications, including heating systems, fuel pipelines, and industrial automation. Solenoid valves come in different configurations, such as 2-way, 3-way, and 4-way designs, and can be powered by either direct current (DC) or alternating current (AC), depending on the specific requirements of the system