english 
Butterfly valve pneumatic actuators and
electric actuators have several differences in performance, cost, and
application scenarios:
Response speed: Pneumatic actuators
generally have a faster response speed, which can quickly open or close the
valve to meet the requirements of rapid flow control. Electric actuators, on
the other hand, may have a relatively slower response due to the need for motor
acceleration and deceleration.
Power source: Pneumatic actuators rely on
compressed air as the power source, which requires an air compressor and
related piping systems. Electric actuators use electricity, which is more
widely available and easier to access. However, in some explosive - prone
environments, pneumatic actuators are preferred for their better explosion -
proof performance.
Torque output: Pneumatic actuators can
provide high torque output, making them suitable for large - diameter butterfly
valves and applications with high - pressure differentials. Electric actuators
also offer various torque options, but their maximum torque may be limited by
the power of the motor.
Cost: Pneumatic actuators usually have a
lower initial cost, but the overall cost of the pneumatic system, including the
air compressor and piping, should be considered. Electric actuators have a
relatively higher initial cost, but they are more energy - efficient in some
cases, which can save operating costs in the long term.
Control accuracy: Electric actuators
generally offer better control accuracy and can achieve more precise
positioning of the valve. Pneumatic actuators can also achieve good control
accuracy with the help of additional control devices, but the control system
may be more complex.
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