Electric actuator: only requires power
Pneumatic actuators: not only power supply but also air source.
Air source system composition: compressor, oil-water separator, filter, pressure reducing valve, gas storage tank, drain, joint...
In summary:
The power source of the electric actuator is easy to access, no additional devices are needed; and the pneumatic actuator needs to be equipped with an air source station, and there are many basic supporting accessories.
Conclusion 1: The power source of electric actuator is easy to obtain, and the structure of control and related equipment is integrated.
2. Material cost
Electric actuator: use ordinary cable, can be buried in the ground, safe and reliable, save space; low procurement cost, low installation cost; power supply without hysteresis, no transmission loss.
Pneumatic actuator: The gas source pipeline is complicated, and the material needs to be selected from metal materials, and the cost is relatively high; the air source lags greatly and is not suitable for remote transmission.
Conclusion 2: The cost of cable materials for electric actuators and low maintenance costs are low.
3. Operating cost
Electric actuators: consume power only when the equipment is running. Low power consumption in standby mode.
Pneumatic actuator: In order to ensure a certain working pressure of the air source, the air compressor needs to run for a long time. High power consumption.
Conclusion 3: The long-term running cost of electric actuators is lower.
4. Debugging
Electric actuator: easy debugging.
Pneumatic actuator: belongs to the installation of special equipment. A special power station needs to be set up, and professional design and construction drawings are required. Before construction, a special construction plan must be compiled and notified to the Shanghai Special Equipment Quality Supervision and Administration Department before construction. It is necessary to ensure that the pneumatic system is clean and dry compressed air; to ensure the airtightness of the system; to ensure the necessary lubrication; to ensure that the pneumatic system gets the specified working conditions (such as operating pressure, voltage, etc.).
Conclusion 4: Commissioning of electric actuators is more convenient.
5. Maintenance
Electric actuator: with automatic fault diagnosis function.
Pneumatic actuator: unable to provide comprehensive fault feedback information, which is not convenient for fault diagnosis, analysis and elimination.
Conclusion 5: The electric actuator has a high degree of intelligence, which is convenient for equipment maintenance and repair.