go to the Actuators product page Sela Shiponi asked on Jun 20th, 2014 in Actuators

How does the mechanical limit stops of the ABB CONTRAC operate?

Please explain more about the mechanical limit stop, what kind and how does it work.
How can you adjust the mechanical limit stops?
What is the difference to other competitors?

Naas DeJager

ABB's answer

The Contrac part-turn actuators series PME/RHD includes a standard design with adjustable mechanical travel stops situated on the outside of the actuator gearbox, these limit stops are for both the 0% and 100% positions of actuator travel. The stops will prevent the drive lever of the actuator to travel past these points once they are set according to the travel angle, the final control element will be protected from any damage incase the actuator is manualy operated with the handwheel in the wrong direction.

The mechanical stops are adjustable to suit the application travel angle and designed to withstand 2x the rated torque of the actuator.

The part turn Contrac actuator with external adjustable mechanical stop design is unique to ABB’s Contrac actuators and such design is not available from competitors.


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  • Naas DeJager

    Naas DeJager

    Naas De Jager is the Global Actuator & Positioner Product Manager for ABB's Instrumentation division and is located in Warminster USA, he has been with ABB for 27 years specializing in engineering and application solutions for the valve automation products.

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