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The difference between pneumatic valves and electric valves

Posted by Bundor valve
In this article, Bundor valve will introduce the difference between pneumatic valves and electric valves, as well as their advantages and disadvantages.
pneumatic valves and electric valves
1.the electric valve USES the motor to do the power, the pneumatic valve USES the compressed air to do the power.
(1)Electric valve advantages: good effect on liquid medium and large diameter gas, not affected by climate.It is not affected by air pressure.
Disadvantages: high cost, poor in wet environment.
(2)Advantages of pneumatic valve: good effect on gas medium and small diameter liquid, low cost, easy maintenance.
Disadvantages: affected by the fluctuation of air pressure, it is easy to be affected by water cut of air pressure in northern winter, resulting in the freezing and non-operation of the transmission part.
2.General pneumatic is faster than electric, electric are both flashlight dual - purpose.And pneumatic to hand, dual-use price is higher.
3.Electric valve for some large pipe diameter, because pneumatic is difficult to do, but the stability of the electric valve door is not as stable as pneumatic, switching speed is slow, the actuator will appear for a long time the phenomenon of clamping teeth.
4.Electric valve action is slow electric valve can do explosion-proof brand is not a lot;Pneumatic valve action is fast, explosion-proof relative price than electric bottom (key pneumatic valve with what accessories, with big brand accessories will be more expensive than electric valve).
5.The operating distance of pneumatic valve is larger than that of electric valve

Pneumatic valve door switch action speed can be adjusted, simple structure, easy maintenance, action process due to the buffering characteristics of the gas itself, not easy to be stuck and damaged, but there must be a gas source, and its control system is more complex than the electric valve.

Electric valve driven by electricity, in the explosion-proof requirements of the occasion is not applicable, such as the surrounding environment dispersion of a large number of easy to dye gas, can only rely on pneumatic.Pneumatic response time is slower than electric, which is not as accurate as electric. Pneumatic valves are powered by gas.And the electric valve is converted into electromagnetism to be used as power, the sensitivity of electric valve is higher than pneumatic valve, safety and reliability is not as strong as pneumatic valve, maintenance is not as simple as pneumatic valve, power is not as strong as pneumatic valve.

Control of pneumatic valves is more complex than that of electric valves.And all aspects of the cost is very expensive, if it involves automatic control, must add electromagnetic directional valve, and electromagnetic directional valve sensitivity directly affects the pneumatic valve.