What is the working principle of solenoid valve?

- Mar 01, 2020-

What is the working principle of solenoid valve?


Trace the history of development, so far, both at home and abroad in principle can be divided into three categories (i.e., straight acting, step by step child guiding type), and from a disc structure and material of the difference between the different and in principle is divided into six branches small class (diaphragm structure, step by step of moving heavy piece of membrane structure, the structure, the forerunner in straight moving piston structure, step by step piston structure, the forerunner of moving piston structure).

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Principle: when normally closed type is energized, electromagnetic force is generated by the electromagnetic coil to lift the open part from the valve seat and open the valve;When power is off, the electromagnetic force disappears, and the spring presses the open piece against the seat, leaving the valve open.(normally open type is the opposite)