3
Non-return dampers are used to close the duct automatically in case of fan being switched off.
In case of a shutdown of one of the fans at fan parallel configuration, the dampers prevent reverse
airflow.
They can be installed within a duct or at its ends.
Dampers are produced in the following designs:
- loose blades (design .01)
- rod connected blades (design .01T)
Damper characteristic
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dimensions
from 200 x 200 to 1400 x 1400 mm (A > 800 with divider)
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blades pitch
82 - 136 mm
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damper length
200 mm
Working conditions
Maximum air circulation speed 12 m.s .
Maximum pressure difference 1500 Pa.
Dampers are suitable for systems without abrasive, chemical and adhesive particles.
Temperature in the place of installation is permitted to range from -20°C to +100°C.
Dampers are designed for macroclimatic areas with mild climate according to EN 60 721-3-3.
