Blast Dampers

TUNNEL AND BLAST DAMPERS

Tested to the limit…
…no Pressure too Great!

www.flamgard.co.uk

Around the world the tunneling sector is growing rapidly due to accelerated advancements in the technology, falling costs and new disruptors to the space. The acceleration of engineered and commissioned underground projects poses unique fire and smoke safety challenges.

Good ventilation is crucial for underground projects to maintain air for humans and HVAC equipment. This is crucial for emergencies and day to day operating and maintenance.

Tunnel dampers preserve volumetric airflow for underground projects in order to maintain air quality to meet operating standards. If a fire event was to occur the removal of smoke and toxic gases is facilitated via tunnel dampers giving emergency operations time and safe areas to conduct their tasks.

Danger and damage is minimised with fire dampers preventing flames from spreading through duct work.

APPLICATION

Flamgard Calidair’s blast dampers are designed to prevent blast forces entering ventilation duct systems or a wide range of installations where a blast could result in loss of life and/or equipment or material. They are rigidly constructed and fully welded for this purpose and comprises of two sections: a dynamic debris catcher directs the blast onto the blade pack. This consequently closes under blast pressure, isolating the blast force and preventing blast damage or loss. The blade open position is adjusted and held by a ‘blast break’ mechanism, ensuring safety and reliability of the system.

STRUCTURE AND DIMENSIONS

Individual units are supplied in sizes up to 1500mm square, with multiple units assembled together in a matrix to cover larger areas as required. Standard units are constructed in 304 or 316 stainless steel.

CERTIFICATION

The Flamgard Calidair blast damper has been independently blast performance tested and is certified by SIRA to 04ATEX9322 for ATEX Group II Category 2 G/D use by SIRA.

Tunnel Dampers

APPLICATION

Flamgard Calidair’s tunnel dampers are rigidly designed and are used to regulate the airflow in transit tunnels. They ensure that the air that is circulating through the tunnel is safe for passenger transit, without excessive build up of exhaust gases. In normal conditions, tunnel dampers control the volumetric air flow in a transit tunnel.

In emergency fire conditions, it is essential that the dampers are there not only for ventilation, but to regulate the fire and the associated smoke and hot gases. Fires in tunnels generate severe smoke which, if not reliably ventilated, could cause those in the tunnel to suffer the life-threatening effects of smoke inhalation. Tunnel dampers can be used in emergency conditions to operate to extract these toxic fumes and smoke away from the critical area as well as providing a fire barrier when closed.

STRUCTURE AND DIMENSIONS

Individual units are supplied in sizes up to 1275mm square, with multiple units assembled together in a matrix to cover larger areas as required. Units are constructed as required in 304 or 316 stainless steel, galvanised mild steel or other materials to suit the client’s specific needs.

STRUCTURE AND DIMENSIONS

Dampers in this range have been tested for operation in temperatures of 400 deg C for 2 hours.