Difference Between Pneumatic Valves And Electric Valves

The difference, advantages and disadvantages between pneumatic valves and electric valves The difference, advantages and disadvantages between electric valves and pneumatic valves

• The difference between pneumatic valves and electric valves

1. Electric valves use electric actuators to control valves, while pneumatic valves are driven by compressed air.

2. Pneumatic valves are faster than electric valves. Electric valves are used for both manual and electric purposes, while pneumatic valves are used for both manual and pneumatic purposes, but they are more expensive.

3. Electric valves are used in some places with large pipe diameters. It is difficult for pneumatic valves to do so. However, the stability of electric valves is not as good as that of pneumatic valves. The switching speed is slow and the actuator will get stuck if it takes a long time. , but the pneumatic valve switches faster under a stable air source.

4. The electric valve moves slowly, and there are not many brands of electric valves that can be explosion-proof; the pneumatic valve moves quickly, and the explosion-proof price is relatively lower than that of the electric valve, but if it is equipped with accessories of a big brand, the price will be more expensive than the electric valve.

5. The essential difference between electric ball valves and pneumatic ball valves lies in the driving device, that is, the actuator.

6. The electric ball valve uses electric energy as power to connect the electric actuator to drive the ball valve;

7. The pneumatic ball valve is powered by the air source to drive the ball valve; configuring different actuators is mainly based on working conditions.

• Advantages and disadvantages of pneumatic valves and electric valves

1. Advantages of electric valve: It has good effect on liquid medium and large diameter gas, and is not affected by climate and air pressure.

Disadvantages: high cost, not suitable for humid environments.

2. Advantages of electric valves: good effect on gas media and small diameter liquids, lower cost, and more convenient to maintain.

Disadvantages: Affected by air pressure fluctuations. For example, in winter in the north, it is easy to be affected by moisture in the air, causing the transmission part to freeze and not move.

3. Characteristics of electric ball valve

• Advantage:

1. Simple structure: integrated design, small size and easy maintenance

2. Simple operation: just connect the wires and it's ready to run.

3. High efficiency and energy saving: power as low as 25W

4. Stable control: stable adjustment performance and high precision

• Disadvantages:

1. Poor heat resistance: high temperature and frequent operation may cause the motor to overheat and cause thermal protection.

2. Action time: Compared with pneumatic valves, the action time of electric valves is slower

3. Explosion-proof performance: Compared with pneumatic valves, electric valves have poor explosion-proof performance

• Characteristics of pneumatic ball valves
• Advantage:

1. Action time: The full stroke action time is as fast as within 1 second.

2. Reset function: the single-acting cylinder can be reset when the air is cut off (air on or off)

3. Explosion-proof performance: driven by air source, good explosion-proof performance

• Disadvantages:

1. Driving conditions: configure the air source on site and ensure that the air source pressure is stable

2. Complex structure: Pneumatic valves need to be equipped with various accessories and the cost is high.

3. Control accuracy: Due to the fast action time, the adjustment accuracy is relatively low

4. Large size: not suitable for conditions with small installation space