(1) The external leakage is blocked, and the internal leakage is easy to control and safe to use. Internal and external leakage is an important factor endangering the safety of solenoid valve. The electromagnetic valve is sealed in the magnetic insulating sleeve under the action of electromagnetic force on the iron core. There is no dynamic sealing, so the leakage is easy to be blocked. Electric valve torque control is not easy, easy to produce internal leakage; solenoid valve structure is easy to control internal leakage until zero. Therefore, it is particularly safe to use, especially in corrosive, toxic or high and low temperature media.
(2) The system is simple, easy to use and cheap. The solenoid valve has simple structure and low price. It is easier to install and maintain than other types of actuators such as control valves. More importantly, the automatic control system is simpler and cheaper. Because the solenoid valve is controlled by switch signal, it is very convenient to connect with industrial computer. In today's era of computer popularization and price drop, the advantage of solenoid valve is more obvious.
(3) Fast action, small power, light shape. The response time of the solenoid valve can be as short as a few milliseconds, even can control the pilot solenoid valve in tens of milliseconds. Because of its independent circuit, it is more sensitive than other automatic control valves. Reasonable design of solenoid valve coil power consumption is very low, belongs to energy-saving products; can only achieve trigger action, automatically maintain the valve position, usually no power consumption. The volume of solenoid valve is small, space saving, light and beautiful.
(4) The adjustment accuracy is limited and the applicable medium is limited. The solenoid valve usually has only two switching states, and the valve core can only be in two limit positions and cannot be continuously adjusted. (many new ideas are trying to break through, but still in the experimental stage) so the adjustment accuracy is still limited. Solenoid valve has high requirements for medium cleanliness. Media containing granular materials shall not be used. If it is an impurity, it must be filtered first. In addition, viscous media cannot be used, and the viscosity of specific products is relatively narrow.
(5) Various models, widely used. Although the solenoid valve has its inherent shortcomings, its advantages are still very prominent, so it has been designed into a variety of products to meet various needs, and has a wide range of applications. The progress of solenoid valve technology also revolves around how to overcome the inherent shortcomings and how to better play its inherent advantages.
