Tunnel/Metro

Due to the limited connection with the atmospheric environment, natural ventilation is not able to meet the strict tunnels' and underground roads' ventilation requirements. Sun Yeh offers fire and smoke damper actuators that are applicable for normal operation such as temperature, humidity, and indoor air quality controls or smoke extraction in case of fire to ensure the safety and comfortability of the environment in tunnels and stations. 

Our OM quarter-turn and S series spring return quarter-turn electric actuators are suitable to be used in ventilation systems, smoke extraction systems, or emergency shutdowns to control smoke. If you are interested in our smoke actuators, just feel free to send an inquiry to us at your time!