Main features of solenoid valve
1. External leakage is blocked, internal leakage is easy to control and safe to use
Internal and external leakage is an element endangering safety. Other automatic control valves usually extend the valve stem, and the electric, pneumatic and hydraulic actuators control the rotation or movement of the valve core. All of these need to solve the leakage problem of long-term action valve stem dynamic seal; only the solenoid valve is completed by using the electromagnetic force to seal the iron core in the magnetic isolation sleeve of the electric control valve, and there is no dynamic seal, so the leakage is easy to be blocked. The torque control of electric valve is not easy, and it is easy to produce internal leakage, or even pull off the head of valve stem; the structure of solenoid valve is easy to control internal leakage until it is reduced to zero. Therefore, the use of solenoid valve is particularly safe, especially suitable for corrosive, toxic or high and low temperature media.
2. Simple system, easy access to computer, low price
The structure of the solenoid valve itself is simple and the price is low. Compared with other kinds of actuators such as control valve, it is easy to install and maintain. What's more, the automatic control system is much simpler and much cheaper. Because the solenoid valve is controlled by switch signal, it is very convenient to connect with industrial control computer. In today's era of computer popularization and sharp price decrease, the advantages of solenoid valve are more obvious.
3. Action express, small power, light 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. Because of self-contained loop, it is more sensitive than other automatic control valves. The properly designed solenoid valve coil has low power consumption, which is an energy-saving product; it can also be used to trigger action and automatically maintain the valve position without any power consumption at ordinary times. The external dimension of the solenoid valve is 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 can not be continuously adjusted, so the adjustment accuracy is also limited.
The solenoid valve has a high requirement for the cleanliness of the medium. The medium containing particles cannot be used. If it is impurity, it must be filtered first. In addition, viscous media can not be used, and the viscosity range of specific products is relatively narrow.
5. Various models and wide applications
Although the solenoid valve has inherent shortcomings, the advantages are still very prominent, so it is designed into a variety of products, to meet different needs, a wide range of uses. The progress of solenoid valve technology is also around how to overcome the inherent deficiencies, how to better play the inherent advantages and start.