1. Price
Whether they are domestic pneumatic valves and electric valves or imported pneumatic and electric ones, their prices are essentially the same. However, because pneumatic valves need to be equipped with air source facilities (e.g. the air compressor station), the electric valve has an advantage in price.
2. Reliability of valves
It is believed that pneumatic valves have extremely high reliability while the reliability of electric valves is opposite. However, the new generation of electric valve actuators usually adopt a new integrated circuit technique, and the average life of electric actuators can reach 5 to 10 years, reaching or even exceeding the service life of pneumatic valves. Therefore, from the perspective of reliability, both types of valves have their own advantages.
3. The output
The selection of an actuator is determined according to the type of the valve and the allowable pressure difference. Thus, the selection of valves should be determined according to the actual situation.
4. Fire and explosion protection
For fire prevention and explosion protection, pneumatic actuators with valve positioners (the attachment of actuators) are far superior to electric actuators.
(1) Only a few electric actuators can be produced to be explosion-proof ones.
(2) Electric actuators are usually not allowed in highly inflammable, explosive and other special occasions.
5. On-site power sources
The pneumatic actuator is selected in most occasions where the requirements for explosion protection are quite high. One of the advantages of the pneumatic valve is safety and explosion protection. Nevertheless, the disadvantage of the pneumatic valve is obvious. It is necessary to establish a better pneumatic mechanism, which needs extra cost to equip the relative equipment (air source facilities). For the electric actuator, the requirements for explosion protection are low, so the electric valve can be the first selected when it is inconvenient to equip the air source facility.
Whether they are domestic pneumatic valves and electric valves or imported pneumatic and electric ones, their prices are essentially the same. However, because pneumatic valves need to be equipped with air source facilities (e.g. the air compressor station), the electric valve has an advantage in price.
2. Reliability of valves
It is believed that pneumatic valves have extremely high reliability while the reliability of electric valves is opposite. However, the new generation of electric valve actuators usually adopt a new integrated circuit technique, and the average life of electric actuators can reach 5 to 10 years, reaching or even exceeding the service life of pneumatic valves. Therefore, from the perspective of reliability, both types of valves have their own advantages.
3. The output
The selection of an actuator is determined according to the type of the valve and the allowable pressure difference. Thus, the selection of valves should be determined according to the actual situation.
4. Fire and explosion protection
For fire prevention and explosion protection, pneumatic actuators with valve positioners (the attachment of actuators) are far superior to electric actuators.
(1) Only a few electric actuators can be produced to be explosion-proof ones.
(2) Electric actuators are usually not allowed in highly inflammable, explosive and other special occasions.
5. On-site power sources
The pneumatic actuator is selected in most occasions where the requirements for explosion protection are quite high. One of the advantages of the pneumatic valve is safety and explosion protection. Nevertheless, the disadvantage of the pneumatic valve is obvious. It is necessary to establish a better pneumatic mechanism, which needs extra cost to equip the relative equipment (air source facilities). For the electric actuator, the requirements for explosion protection are low, so the electric valve can be the first selected when it is inconvenient to equip the air source facility.
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