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Galvanized or stainless steel airfoil blades and frames with stainless steel axles, linkage and bearings provide the TFD80 optimum and reliable performance for fire rated tunnel ventilation dampers.  Damper is equipped with either pneumatic spring return or electric with battery backup actuators and provides excellent fail-safe protection.  It withstands over 8 million cycles of the world's first 6kPa true fluctuating pressure tests without any signs of metal fatigue.

TFD80 meets the following international standards:

  • BS476 Part 20  -  4 hours FRP
  • UL555S  -  Class I leakage
  • Smoke extraction  -  Continuously operating at 300 deg C for 2 hours

Ruskin model TFD80 heavy duty flanged-frame fire and smoke damper maintains the highest standards of life safety for ventilation in modern tunnel transit systems.  The TFD80 is designed for effective operation during normal ventilation conditions and provides a reliable means of smoke control during emergency situations.  Ruskin's TFD80 is designed to satisfy NFPA-130 & NFPA-502 standards, and also carries the following certifications:

  • Southwest Research Institute Fire Tested to BS476:20
  • U.L. Special Services Elevated Temperature Test
  • U.L. Special Services Test for Operation, Pressure Drop and Leakage
  • Hong Kong FSD Letter of No Objection
  • UAE Civil Defense Certificate