The actuator is suitable for its excellent reliability, economy, smooth operation, sufficient output torque, simple structure and convenient maintenance. In the executive agencies, they are divided into electric actuators and scotch yoke pneumatic actuator. They have their own characteristics, so how should we choose them? Don't worry, here's a comparison  scotch yoke pneumatic actuato and relectric actuators.
1. Anti-overload capability and service life
Electric actuators can only be used for intermittent operation, so they are not suitable for continuous closed-loop operation. Pneumatic actuator has anti-overload capability and is maintenance-free throughout its service life. No oil change or other lubrication is required. Its standard service life is up to one million switching cycles, so pneumatic actuators are superior to other valve actuators.
2. safety
Pneumatic actuators can be used in potential explosive hazards, especially in the following situations:

Explosion-proof valves (such as Namur valves with suitable coils), valves or valve islands need to be installed outside the explosion zone, and pneumatic actuators used in the explosion zone need to be driven through the trachea; electric actuators are not easy to use in potential explosion hazards and are costly.

3. Anti-overload capability
Electric actuators will quickly reach the torque limit when additional torque is required or special requirements for force are required. Especially when valve actuators are opened irregularly or shut down for a long time, the advantages of pneumatic actuators against overload are obvious, because sediment or sinter will increase the starting torque. The use of pneumatic components can easily increase the working pressure and force or torque.
4. economy
In water and sewage treatment technology, most valve actuators are operated in the open/close mode or even designed as manual operation. Therefore, pneumatic components open up an important prospect of rationalization. Compared with pneumatic actuators, if electric actuators are used, monitoring functions such as overtemperature monitoring, torque monitoring, conversion frequency, maintenance cycle must be designed in the control and test system, which results in a large number of line inputs and outputs. In addition to terminal position sensing and gas source processing, the pneumatic actuator does not require any monitoring and control functions. The cost of pneumatic actuator is very low, so it is more important to automate the manual valve actuator.
5. assembly
Pneumatic technology is very simple. It is easy to install the pneumatic actuator on the valve drive head and connect and drive the gas source processing device. In addition, the maintenance-free design of the pneumatic actuator ensures the easy-to-use and ready-to-install operation.
6. element
Pneumatic components have high vibration resistance, strong, durable, and generally do not damage. Even high temperatures do not damage corrosion-resistant components. Electric actuator is composed of a large number of components, relatively easy to damage.
7. Technology
The linear actuator acts directly on the closing device, while the swing actuator only needs a piston and a driving shaft to convert the "linear compressed air force" into swing. Slow motion can also be easily achieved by using pneumatic actuators, such as slow motion by using simple and low-cost flow control elements. The electric actuator will lose a lot of energy when it converts the supplied energy into motion. First of all, the electric motor converts most of the energy into heat, and secondly, the use of gearboxes.
In this paper, the differences between thescotch yoke pneumatic actuator and the electric actuator are analyzed from the aspects of anti-overload capability and service life, safety, economy, assembly, components and technology. For more information about the scotch yoke pneumatic actuator, please call for advice.