For many applications, such as emergency shutdowns (ESD), on-off quarter valves with electric actuators are the best fit. In the event of loss of power, some type of fail-safe mechanism may be required to bring the valve into an open or closed position as required by the process. These applications are typically found in the oil & gas, power, chemical, HVAC, and water & wastewater industries.
The Bettis RTS FQ Fail-Safe Quarter-turn Electric Actuator use energy stored in mechanical springs to position the valve in fail-safe close or open direction. The fail-safe actuators provide a reliable and repeatable mechanism for fail-safe actions without dependency on battery backup or the repeated re-charge cycles of a super capacitor. The mechanical fail-safe spring action enables safe operating mechanism for emergency shutdowns.
In this 16:19 YouTube video, Bettis RTS Fail-Safe Quarter Turn Electric Actuator Basic Technical Overview, Emerson’s Aaron Roepke provides a product overview and demonstration of certain configuration and setup steps including user interface rotation, user interface navigation, variable speed adjustment, and mechanical fail-safe speed adjustment.
Aaron opens pointing to and explaining the components in the electric actuator. He demonstrates how to rotate the user interface based on how the actuator is mounted to the valve. He then provides an overview of the control unit. Finally, Aaron shows how to adjust the speed of the fail-safe action in the actuator as required by the application. Note: these hyperlinks go to separate videos showing just these portions from the embedded video above.
For more on these fail-safe electric actuators, visit the Bettis RTS FQ Fail-Safe Quarter-turn Electric Actuator page on Emerson.com. You can also connect and interact with other valve actuator experts in the Valves, Actuators & Regulators group in the Emerson Exchange 365 community.