1. External leakage is blocked, internal leakage is easy to control, and it is safe to use
Internal and external leaks are a safety hazard. Other automatic control valves usually extend the valve stem, and the rotation or movement of the valve core is controlled by electric, pneumatic, or hydraulic actuators. This must solve the problem of external leakage of the dynamic seal of the valve stem during long-term operation; only the solenoid valve uses electromagnetic force to act on the iron core sealed in the magnetic isolation sleeve of the electric regulating valve. There is no dynamic seal, so the external leakage is easy to be blocked. . It is difficult to control the torque of electric valves, and it is easy to cause internal leakage, and even break the valve stem head; the structure of the solenoid valve makes it easy to control internal leakage until it drops to zero. Therefore, solenoid valves are particularly safe to use and are especially suitable for corrosive, toxic or high and low temperature media.
2. The system is simple, easy to connect to the computer, and the price is low
The solenoid valve itself has a simple structure and low price. It is easier to install and maintain than other types of actuators such as control valves. What is more significant is that the automatic control system is much simpler and the price is much lower. Since the solenoid valve is controlled by a switch signal, it is very convenient to connect to the industrial control computer. In today's era when computers are popular and prices have dropped sharply, the advantages of solenoid valves are even more obvious.
3. Express action, small power, light and compact appearance
The response time of the solenoid valve can be as short as several milliseconds, and even the pilot solenoid valve can be controlled within tens of milliseconds. Due to its self-contained circuit, it is more sensitive than other automatic control valves. A properly designed solenoid valve coil has very low power consumption and is an energy-saving product; it can also automatically maintain the valve position by simply triggering the action, and does not consume any power at all. The shape and size of the solenoid valve are small, which not only saves space, but also is light and beautiful.
4. The adjustment accuracy is limited and the applicable medium is limited
The solenoid valve usually only has two states of switch, the valve core can only be in two limit positions, and it cannot be adjusted continuously, so the adjustment accuracy is still limited.
Solenoid valves have high requirements on the cleanliness of the medium, and the medium containing particles cannot be used. If it is an impurity, it must be filtered out first. In addition, viscous media cannot be applied, and the viscosity range of specific products is relatively narrow.
5. Variety of models and wide range of uses
Although solenoid valves have inherent shortcomings, their advantages are still very prominent, so they are designed into a variety of products to meet various needs and have a wide range of uses. The advancement of solenoid valve technology also revolves around how to overcome inherent deficiencies and how to better utilize inherent advantages.
