Working principle of direct-acting solenoid valve

Working principle of direct-acting solenoid valve

There are two types: normally closed type and normally open type. The normally closed type is in a closed state when the power is off. When the coil is energized, an electromagnetic force is generated, causing the moving iron core to overcome the spring force and attract the static iron core to directly open the valve, and the medium is in a path;when the coil is powered off, the electromagnetic force disappears and the moving iron core The core resets under the action of spring force and directly closes the valve port, blocking the flow of the medium. It has a simple structure, reliable action, and works normally under zero pressure difference and micro vacuum. The normally open type is just the opposite. Such as solenoid valves with a flow diameter smaller than φ6.