Tunnel air damper
• Multi leaf dampers with parallel or opposite
blades specially designed for underground applications
• Made of hot dip galvanized steel after manufacture or in
stainless steel AISI 304L/316L equivalent to
EN 1.4301/1.4404
• Air leakage less than 0.1 m³/sm² at 1kPa
• Blade deflection less than L/180 at 6 kPa
• Operational cycling (open-close) up to 6 million cycling
• Actuators pneumatic, electro-pneumatic, spring return, on/off,
modulating
• Supply 230 or 400V, 50 or 60 Hz, 1 or 3 ph
• The entire damper including motor can operate with hot air or
smoke up to 400°C for 2 h certified in accordance to CETU/PIARC.
