Rotary Vane Valve Actuators for Critical Applications

by | Jul 2, 2020 | Oil & Gas, Valves, Actuators & Regulators

Jim Cahill

Jim Cahill

Chief Blogger, Social Marketing Leader

If you’re unfamiliar with rotary vane valves actuators, they are used to automate ball valves or plug valves in all types of severe climatic conditions. These actuators are typically installed in applications that are critical in nature where the consequences of failure can be severe. For example, in natural gas pipeline applications these actuators are typically powered by natural gas for use in emergency shutdowns, mainline isolation, linebreak protection, station blow down, remote valve control, and high- & low-pressure shutoff conditions.

This quick 3-minute video, Shafer RV Series Rotary Vane Valve Actuators–-operating systems for critical pipeline applications illustrates the construction, features, benefits and applications for these actuators.

The video opens showing the materials of construction and its design to last for 50 years of service. Next, it shows some the specifications such as rated pressures, torque output, power supply pressures and mediums, and ambient temperature ranges. It highlights the advantages of rotary vane actuation technology such as no motion conversion from linear to rotary, no side loading on bearings or valve stems, and balanced torque output.

This torque output remains constant through the complete rotation of the actuator. It operates through opposite chambers in the actuator connected by equalizing passages in the upper and lower heads. This produces perfectly balanced torque as the hydraulic force simultaneously pushes both the rotor vanes away from the stationary shoes.

Visit the Shafer RV-Series Hydraulic Valve Actuator page and Turnkey Valve Operating System Actuator Control Package section on for more on this and other actuator technologies to help drive safe, reliable and efficient operations.

You can also connect and interact with other valve actuator experts in the Valves, Actuators & Regulators group in the Emerson Exchange 365 community.

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The opinions expressed here are the personal opinions of the authors. Content published here is not read or approved by Emerson before it is posted and does not necessarily represent the views and opinions of Emerson.