1. The external leakage is blocked, the internal leakage is easy to control and safe to use
Internal and external leaks are a threat to 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. This must solve the problem of external leakage of the long-term action valve stem dynamic seal; only the solenoid valve is completed by the electromagnetic force acting on the iron core sealed in the magnetic insulation sleeve of the electric regulating valve, and there is no dynamic seal, so the leakage is easy to be blocked . Electric valve torque control is not easy, it is easy to produce internal leakage, and even break the stem head; the structure of the solenoid valve is easy to control internal leakage until it reaches zero. Therefore, the use of solenoid valves is particularly safe, especially suitable for corrosive, toxic or high and low temperature media.
2, the system is simple, it will be connected to the computer, the price is low
The solenoid valve itself has a simple structure and a low price, and is easier to install and maintain than other types 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. Since the solenoid valve is controlled by a switch signal, it is very convenient to connect with an industrial computer. In today's era of popularization of computers and sharply lower prices, the advantages of solenoid valves are even more obvious.
3, action express, small power, lightweight
The 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. Due to its own circuit, it is more sensitive than other self-control valves. A properly designed solenoid valve coil consumes very low power and is an energy-saving product. It can also automatically trigger the action and maintain the valve position without power consumption. The small size of the solenoid valve saves space and is light and beautiful.
4, the adjustment accuracy is limited, the applicable medium is limited
Solenoid valve usually only has two states of opening and closing. The valve core can only be at two extreme positions and cannot be adjusted continuously, so the adjustment accuracy is also limited to a certain extent.
Solenoid valve has higher requirements on the cleanliness of the medium. Granular media cannot be used. If it is an impurity, it must be filtered first. In addition, viscous media cannot be used, and the viscosity range of media for specific products is relatively narrow.
5.Various models and widely used
Although the solenoid valve has inherent disadvantages, 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 the inherent deficiencies and how to make better use of the inherent advantages.