Tight shut-off dampers are used for special industrial applications demanding high air tightness. The blades are aluminum hollow airfoil type to minimize air leakage. Blade transmission is either gear drive or link drive. Gear-driven models have a maximum operating temperature below 80°C.
Outer frame: galvanized steel sheet; blades: aluminum hollow airfoil blades manufactured from high-strength aluminum alloy.
Adjustment mechanism: gear drive or link drive. Transmission parts of gear mechanism: engineering plastics; transmission parts of link mechanism: high-quality carbon steel. Max working temperature ≤80°C. Seals: custom airtight rubber. Standard electric actuators are imported for safe and long-term operation. Electric control includes on-off signal and modulating signal types; fast actuators are optional.
