Aluminum ventilation damper VF750

for pressure relieffor building

The positive (V-) and negative (N-) dampers for mounting in the wall or between two ducts are used as automatic operating dampers of air diffusers in airconditioning installations to prevent undesirable air flows. Aluminium pressure relief damper, equipped with blades having an acoustic joint and running in nylon bushings. In order to prevent the blades from rotating, a blade stop has been provided. Distance of the blades is 75 mm. These can be mounted in the wall, a ceiling or beneath exposed air ducts. The removable interior and the smooth surface make the valve easy to clean. • blades with acoustic joint for return • smoothly rotating nylon bushing blades • over rotation of blades is prevented by a stop • distance blades = 75 mm • max. deflection of the blades (completely open) = 70 mm • available in steps of 25 mm, as well in length as in height min L = 200 mm, max L = 1800 mm min H = 200 mm, max H = 1800 mm • nom. L ≤ 625: no partition 650 m nom. L ≤ 1225: 1 partition 1250 m nom. L ≤ 1800: 2 partitions • NF750/VF750: extruded aluminium frame, natural tone anodised; blades in aluminium sheet • NU750/VU750: galvanised steel sheet U-frame; aluminium sheet blades Aluminium pressure relief damper, equipped with blades with acoustic joint and rotating nylon bushings.In order to prevent the blades from over rotating, a blade stop has been provided.