The rotary actuators play an important safety role in the Turkish subway.

Rotolock has installed over 150 RC200 pneumatic actuators in the fire dampers' valves of the Turkish subway. (Note: Fire dampers are safety products installed inside railway tunnels to prevent the spread of flames and smoke, closing during a fire to prevent flames and smoke from reaching the railway tunnel.) The RC200 is a compact pneumatic actuator equipped with a Scotch-Yoke mechanism, performing ESD or isolation functions. It was chosen for its fast operating speed and long-term use with minimal maintenance, utilizing a spring-return design. The actuators in the RC range can operate normally even in high-temperature environments ranging from 0 °C to +150 °C. In this case, a high-temperature model capable of withstanding 250 °C for 2 hours and an additional hour at 400 °C was selected. The RC pneumatic actuators operate at such high temperatures without affecting the exterior fireproof coating. This actuator has obtained ATEX 2014/34/EU certification.

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