Comparison of electric valves and pneumatic valves

Comparison of electric valves and pneumatic valves

1. Fire and explosion

　　 In terms of fire and explosion protection, pneumatic actuator + valve positioner is far superior to electric actuator:

　　 1. There are only a few electric actuators for copper solenoid valves that can be produced as explosion-proof series.

　　 2. Special occasions such as highly flammable and explosive are usually not allowed to use electric actuators.

2. Obvious effort

　　 The selection of the actuator is determined according to the valve type and allowable pressure difference. Therefore, the specific selection should be determined according to the actual situation, which requires flexibility.

3. Price

　　The technical indexes of electric valve actuator and pneumatic valve actuator + valve positioner are basically the same. The prices of the two types of valve actuators are comparable regardless of domestic or imported products. Pneumatic valves need to be equipped with air compressor stations and other gas source facilities, so choosing electric valves has an advantage in price.

4. Power source

　　 Pneumatic valve actuators are mostly used in occasions with extremely high explosion-proof requirements-one of the advantages of pneumatic valves is intrinsically safe explosion-proof, and the disadvantages are obvious-a more complete pneumatic mechanism needs to be established, which increases the configuration cost. The electric valve actuator can be made from local materials. When the explosion-proof requirement is not high, and it is inconvenient to equip the air source, choose electric valve.

5. Reliability

　　 We used to think that the reliability of pneumatic valves is high, but the reliability of electric valves is poor. However, the new generation of electric valve actuator adopts new circuit integration technology. After abandoning the previous Achilles heel, the gas solenoid valve enables the actuator to be used for an average of 5-10 years, thus reaching or exceeding the service life of the pneumatic valve. So in terms of reliability, the two types of valves have their own advantages.

This article is original by the manufacturer of the magnetic turning column level gauge, please indicate http://www.sungofluid.com/