Mode of Operation

At tunnel portals there may exist e.g. meteorological wind pressure (or in mountainous areas e.g. barometric pressure difference) which can change very quickly. This poses a task almost insurmountable for ultramodern systems for fire smoke ventilation.

With FIRECURTAINS, natural airflow in the tunnel is strongly reduced. This enables the existing smoke ventilation to effectively keep smoke-free and safe the areas where persons are.

Sophisticated System

To protect the FIRECURTAINS and their mechanics from soiling, they are installed in a closed casing of stainless steel at the ceiling of the tunnel 1 . In case of fire, a slider first opens this casing and closes it again fully automatically after the curtains have been lifted again.

To achieve a stable position of the curtains, they are provided with special weights 2 . The lamella form 3 enables vehicles (cars and trucks) as well as pedestrians to pass through simply and safely.