Ball valves are mainly used in pipelines to shut off, distribute and change the flow direction of the medium. They can be tightly closed with just a 90-degree rotation and a small operating torque. Ball valves are best suited for use as on-off and shut-off valves, including V-type ball valves. In addition to pipeline parameters, special attention should also be paid to the environmental conditions for the use of electric valves. Since the electric actuator of an electric valve is an electromechanical device, its operating condition is greatly affected by the service environment. Generally, special precautions should be taken when electric ball valves and butterfly valves are used in the following environments.