English version machine-translated from the Vietnamese original — under review.
In particular, the torsion-spring fusible-link fire damper is fitted with a 5-in-1 controller. It allows the damper status to be monitored and controlled locally or remotely, improving the reliability and readiness of this type of damper, and it is a patented invention of NSCA.
All dampers achieve a 2-hour fire rating (EI120) and can be installed in many different positions, including the difficult, project-specific locations!
https://starduct.vn/van-ei-cau-chi-lo-xo-xoan-5-in-1-l210-ei30-45-60-90-120-p100
