Which three types of power actuators are commonly used to operate valves in water systems?

The correct answer, which identifies the three commonly used types of power actuators in water systems, focuses on electric, hydraulic, and pneumatic actuators.

Electric actuators are widely employed due to their ease of integration into modern control systems and their ability to provide precise control of valve position through electrical signals. They are advantageous for their reliability and low maintenance requirements.

Hydraulic actuators utilize fluid pressure to operate valves and are favored in applications where high torque or force is necessary. Their ability to manage large valves or processes requiring significant power makes them essential in certain water distribution applications.

Pneumatic actuators, which rely on compressed air, are valued for their quick response times and capability to deliver rapid valve operation. They are often used in situations where speed is crucial, or where electric power is unavailable or impractical.

These three types of actuators are integral to efficient and effective valve operation in water distribution systems, highlighting their importance in maintaining the functionality and reliability of the water infrastructure. The other options listed include actuators that may not be as commonly associated with water systems or do not align with standard industry practices.