What are the advantages and disadvantages of electric ball valve and pneumatic ball valve respectively? Their applications for different working conditions are different. The specific points are as follows:
1、 Electric valve is powered by motor, and pneumatic valve is powered by compressed air.
(1) Advantages of electric valve: good effect on liquid medium and large diameter gas, not affected by climate. It is not affected by the pressure of air compressor. Disadvantages: high cost, bad in humid environment.
(2) Advantages of pneumatic valve: good effect on gas medium and small diameter liquid, low cost and convenient maintenance. Disadvantages: Affected by the pressure fluctuation of air compressor, it is easy to be affected by the water content of air compressor in northern winter, causing the transmission part to freeze and not act.
2、 Generally, pneumatic operation is faster than electric operation. Electric operation is both manual and electric. However, the price of manual and pneumatic is relatively high.
3、 Electric valve is used in some places with large pipe diameter because it is difficult to do it pneumatically
However, the stability of the electric valve is not as good as that of the pneumatic valve with slow switching speed. The actuator will be stuck for a long time. The pneumatic valve has fast switching speed and high precision, but needs a stable air source.
4、 The action of electric valve is slow, and there are not many brands of electric valve that can achieve explosion-proof; The pneumatic valve acts quickly, and the explosion-proof price is relatively lower than the electric valve.
The interlocking valves are also electric. Why?
(1) According to the local weather and climate, if the climate is wet, the pneumatic valve cannot be used because the air source contains water.
(2) The electric valve can also realize the interlocking function without additional cost, while the pneumatic interlocking will increase the retaining valve and cost.
Advantages and disadvantages of electric valve and pneumatic valve When electric valve is required instead of pneumatic valve and when pneumatic valve is required instead of electric valve, what are their advantages and disadvantages and price.
The action force distance of the pneumatic valve is larger than that of the electric valve. The action speed of the pneumatic valve can be adjusted. The pneumatic valve is simple in structure and easy to maintain. Due to the buffer characteristics of the gas itself, it is not easy to be damaged due to jamming during the action. However, there must be an air source, and its control system is also more complex than that of the electric valve.
The electric valve is driven by electricity, which is not applicable to the occasions with explosion-proof requirements. For example, when a large amount of flammable gas is dispersed in the surrounding environment, it can only be driven by air. Pneumatic response time is slower than electric response time. It is not as accurate as electric valve. Pneumatic valve is driven by air. The electric valve is powered by converting electricity into electromagnetic energy. The sensitivity of the electric valve is higher than that of the pneumatic valve, the safety reliability is not as strong as that of the pneumatic valve, the maintenance is not as simple as that of the pneumatic valve, and the power is not as strong as that of the pneumatic valve. The control of pneumatic valve is more complicated than that of electric valve. 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. I agree with the statement on the first floor.
As long as there is electricity, electric valves can be used. In some factories, many tools and equipment use compressed air. In this case, pneumatic valves may be used because there are ready-made valves. Sensitive, safe and reliable, many factories with high control requirements set compressed air stations for pneumatic instrument control elements.
