1, the external leakage is blocked, the internal leakage is easy to control, the use of safety
Internal and external leakage is a hazard to safety. Other automatic valves usually extend the stem, by electric, pneumatic, hydraulic actuator control spool rotation or movement. It is necessary to solve the external leakage problem of long-term action valve stem dynamic seal; Only the solenoid valve is the electromagnetic force acting on the iron core sealed in the electric regulating valve magnetic separation sleeve, there is no dynamic seal, so the leakage is easy to block. Electric valve torque control is not easy, easy to produce internal leakage, or even pull the stem head; The structure of the solenoid valve allows easy control of 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, the system is simple, then the computer, low price
The solenoid valve itself is simple in structure and low in price. It is easy to install and maintain compared with other kinds of actuators such as regulating valves. What is more remarkable is that the automatic control system is much simpler and the price is much lower. Because the solenoid valve is a switch signal control, and industrial control computer connection is very convenient. In today's computer popularity, the price of the era of substantial decline, the advantage of the solenoid valve is more obvious.
3, action express, small power, lightweight appearance
Solenoid valve response time can be as short as a few milliseconds, even pilot solenoid valve can be controlled in dozens of milliseconds. Because of its own loop, it is more sensitive than other automatic valves. Properly designed solenoid valve coil power consumption is very low, energy saving products; Can also do only trigger action, automatically maintain the valve position, usually no power consumption. Solenoid valve size is small, saving space, lightweight and beautiful.
4, the adjustment accuracy is limited, the applicable medium is limited
Solenoid valve usually only switch two states, the spool can only be in two limit position, can not be adjusted continuously, so the adjustment accuracy is also limited.
Solenoid valve has higher requirements for media cleanliness, containing granular media can not be applied, such as impurities must be filtered first. In addition, viscous media cannot be applied, and the range of media viscosity suitable for specific products is relatively narrow.
5, various models, a wide range of uses
Although the solenoid valve has congenital shortcomings, the advantages are still very prominent, so it is designed into a variety of products to meet a variety of different needs, very wide range of uses. The progress of solenoid valve technology is also around how to overcome congenital deficiencies, how to better play the inherent advantages.
