Leak-Tight Non-Return Ventilation Damper (DIN 25_496)

The leak-tight non-return ventilation damper (DIN 25_496) closes as soon as the pressure in your ventilation network becomes zero or negative and automatically locks off the ducts, protecting the air handling units from back-pressure phenomena.

Extensive practical experience and numerous laboratory tests have been carried out to optimise the efficiency of non-return dampers. The results show that the leak-tight non-return ventilation damper (DIN 25_496) has a very low pressure drop and, above all, low leakage rates.

TECHNICAL SPECIFICATIONS
Dimensions: from 200 x 200 mm to 1,400 x 2,000 mm
Overall damper depth: 360 mm
Max. temperature: 90°C
Maximum leakage to DIN 25 496: <10 L/(h-m²) at 1 bar, 20°C and p = 2,000 Pa

TECHNICAL DATA
The damper frame is in stainless or galvanised steel and can accommodate up to seven blades in reinforced, resistant elastic materials.