How can I choose a valve actuator?

How can I choose a valve actuator?

Both pneumatic and electric actuators are useful across a broad range of valve applications. Each type of actuator has its advantages and disadvantages, and choosing one depends primarily on your specific requirements. The main points to consider when comparing the two are:
1. Cost
2. Power source availability
3. Temperature range
4. Environment/hazardous areas
5. Fail-safe requirements
6. Torque or thrust requirements
7. Control Functions