The solenoid valve is driven by a coil, which can only be opened or closed, and the action time is short when switching. Solenoid valves generally have a small flow coefficient and a small working pressure difference. For example, the flow coefficient of the general 25-caliber solenoid valve is much smaller than that of the 15-caliber electric ball valve. The driving of the solenoid valve is through the solenoid coil, which is relatively easy to be damaged by voltage shock. It is equivalent to the role of a switch, that is, on and off. The solenoid valve is suitable for some special process requirements, such as leakage, special fluid medium, etc., and the price is relatively expensive.

Main Features of Solenoid Valve:

1. External leakage is blocked, internal leakage is easy to control, and it is safe to use. Internal and external leaks are elements that endanger safety. Other automatic control valves usually extend the valve stem, and the rotation or movement of the valve core is controlled by electric, pneumatic and hydraulic actuators. All this needs to solve the problem of external leakage of the dynamic seal of the long-term action valve stem; only the solenoid valve is completed by electromagnetic force acting on the iron core sealed in the magnetic isolation sleeve of the electric regulating valve, and there is no dynamic seal, so the external leakage is easy to block. . The torque control of the electric valve is not easy, it is easy to cause internal leakage, and even the head of the valve stem is broken; the structure of the solenoid valve is easy to control the internal leakage until it drops to zero. Therefore, the solenoid valve is safe to use, especially suitable for corrosive, toxic or high and low temperature media.

2. The system is simple, just connect to the computer, and the price is low. The solenoid valve itself has a simple structure and low price, and is easier to install and maintain than other types of actuators such as control valves. The composed automatic control system is much simpler and the price is much lower. Because the solenoid valve is controlled by switch signal, it is very convenient to connect with the industrial computer. In today's era of computer popularization and price drops, the advantages of solenoid valves are even more obvious.

3. Action express, small power and light appearance. Solenoid valve response time can be as short as a few milliseconds, and even pilot-operated solenoid valves can be controlled within tens of milliseconds. Because of its own loop, it is more sensitive than other automatic control valves. A properly designed solenoid valve coil has low power consumption and is an energy-saving product; it can also be achieved only by triggering the action to automatically maintain the valve position without power consumption at all. The solenoid valve has a small size, which saves space and is light and beautiful.

4. The adjustment accuracy is limited, and the applicable medium is limited. Solenoid valves usually only have two states of on and off, the valve core can only be in two extreme positions, and cannot be adjusted continuously. The solenoid valve has high requirements on the cleanliness of the medium, and the medium containing particles cannot be applied. If it is an impurity, it must be filtered out first. In addition, viscous media cannot be used, and the range of media viscosity suitable for specific products is relatively narrow.

5. Various models and wide range of uses. Although the solenoid valve has inherent deficiencies, its advantages are still very prominent, so it is designed into a variety of products to meet various needs and has a wide range of uses. The advancement of solenoid valve technology also revolves around how to overcome innate deficiencies and how to better utilize inherent advantages.