With the continuous improvement of technology, pneumatic valves and electric valves have replaced the use of manual valves in many working conditions. Many users do not know how to choose between pneumatic valves and electric valves. In order to correctly choose pneumatic valves and electric valves, you must first understand the use and comparison of pneumatic valves and electric valves. With the continuous improvement of technology, pneumatic valves and electric valves have replaced the use of manual valves in many working conditions. Many users do not know how to choose between pneumatic valves and electric valves. In order to correctly choose pneumatic valves and electric valves, you must first understand the use and comparison of pneumatic valves and electric valves. Pneumatic valves and electric valves are composed of electric actuators and pneumatic actuators equipped with various types of valves, which are used to replace manual valves in working conditions to achieve automatic control. The biggest difference between the two valves is the driving source. How to choose these two valves in actual use mainly depends on which valve is suitable for the actual working conditions. The following introduces the general differences in the use of these two valves. First of all, the action time of pneumatic valves is faster than that of electric valves. Moreover, pneumatic valves can be opened repeatedly in a short period of time, and electric valves with too high switching frequency will cause the motor to heat up. Therefore, pneumatic valves are more suitable for occasions that require quick shutoff. Because electric valve actuators are all electronic components, they are prone to sparks when a failure occurs. Therefore, pneumatic valves are more suitable for use in flammable and explosive situations than electric valves. In terms of maintenance, pneumatic valves are easy to maintain and do not require high professional skills from maintenance personnel. The opposite is true for electric valves. However, the maintenance cost of pneumatic valves is much higher than that of electric valves. In terms of on-site conditions, the use of pneumatic valves requires an air source on site, while electric valves can be used after being connected to the power supply. This is much more convenient than pneumatic valves.
With the progress of the times and continuous reform, my countries valve products have also innovated with the changes of the times. Currently, in the valve market where environmental protection and safety are increasingly vocal, the use of automatic control devices such as electric valves and pneumatic valves has gradually become more and more popular. of. The use of automatic control valves is more energy-saving and safer and more reliable. Compared with traditional manual valves, it moves faster than ordinary valves, which not only reduces manual manpower, but also greatly improves work efficiency. (1) 1. Advantages of electric valves: good effect on liquid media and large diameter gases, and not affected by climate. Not affected by air pressure. Disadvantages: high cost, not good in humid environment. 2. Advantages of pneumatic valves: good effect on gas media and small diameter liquids, low cost, and easy maintenance. Disadvantages: Affected by fluctuations in air pressure, the air is easily affected by water content in the northern winter, causing the transmission part to freeze and become inoperable. (2) Generally, pneumatic ones are faster than electric ones, and electric ones can be used as flashlights. The pneumatic ones, which are both hand-operated and gas-operated, are relatively expensive. Electric valves move slowly. There are not many brands of electric valves that can be explosion-proof; pneumatic valves move quickly, and explosion-proof prices are relatively lower than electric valves (the key is what accessories are equipped with pneumatic valves, and the accessories will be more expensive than electric valves). (3) Electric valves are used in some places with large pipe diameters, because pneumatic valves are difficult to operate, but the stability of electric valve doors is not as good as pneumatic valves, the switching speed is slow, and the actuator may jam for a long time. Pneumatic valve doors open and close quickly and with high precision, but they require a stable air source. (4) The operating force distance ratio of pneumatic valves is that of electric valves. The opening and closing speed of pneumatic valves can be adjusted. The structure is simple and easy to maintain. Due to the buffering characteristics of the gas itself during the action process, it is not easy to be damaged due to jamming, but there must be a gas source. And its control system is also more complex than electric valves. (5) Electric valves are driven by electricity and are not suitable for occasions with explosion-proof requirements. For example, when a large amount of easily contaminated gases are dispersed in the surrounding environment, they can only rely on pneumatic valves. Pneumatic response time is slower than electric and not as accurate as electric. Pneumatic valves are powered by gas. Electric valves use electricity converted into electromagnetic energy as power. Electric valves are more sensitive than pneumatic valves, are not as safe and reliable as pneumatic valves, are not as easy to maintain as pneumatic valves, and are not as powerful as pneumatic valves. The control of pneumatic valves is more complicated than that of electric valves. Moreover, all aspects of the cost are very expensive. If automatic control is involved, an electromagnetic reversing valve must be added, and the sensitivity of the electromagnetic reversing valve directly affects the pneumatic valve. Compared with pneumatic valves, electric valves have a simple structure and reliable operation, and their power source (power supply or air source) is easy to solve for remote operating points. The disadvantage is that the price is higher and the explosion-proof requirements are also higher. When selecting, factors such as the availability, price, and control requirements of the power source should be comprehensively considered. When selecting a valve, you generally first confirm parameters such as valve material, valve diameter, medium type, pipeline pressure, connection method, control method, medium temperature, etc.