Ventilation dampers are offered in round and rectangular system as airtight, regulating and non-return dampers. Each damper can be equipped with manual mechanism, enabling to use of insulation or it can be adjusted for connection to a servomotor.Features:
*Made of high quality GI sheet with thickness 0.5mm
*Used round duct system to adjust air volume
Advantage:
1. quick assembly
2. factory fitted seal with no loose fittings
3. can be twisted and adjusted, but has no effect on the gas tightness
4. installation without sealant or solvents
5. can be used in all kinds of climates
6. the gas tightness can keep good from 5000 Pa negativepressure to 3000 Pa positive