Multi-vane Square Air Damper

The multi-vane square air damper is a high-performance airflow control device designed for square duct systems in ventilation,air conditioning,and industrial exhaust applications.It features a robust square frame with multiple parallel or opposed aerofoil blades interconnected by a precision linkage mechanism,enabling synchronous adjustment of blade angles to modulate,balance,or fully shut off airflow.

Engineered for low leakage and stable operation,this damper ensures accurate airflow regulation and reliable isolation.It can be operated manually or equipped with electric,pneumatic,or explosion-proof actuators for automated control,making it suitable for both commercial HVAC and industrial process systems.

Core Features

Precise Airflow Regulation

Available in parallel(for on/off and tight shutoff)or opposed(for linear modulation)blade configurations.Aerofoil blades minimize pressure drop while delivering consistent,linear airflow control across the full operating range.

Low-Leakage Performance

Sealed blade tips and side gaskets(EPDM/PP)ensure low leakage,complying with EN 1751 Class C(casing)and Class 1–2(closed blades)standards.Ideal for applications requiring tight isolation.

Durable&Sturdy Construction

Frame and blades are typically made of galvanized steel,stainless steel,or aluminum for corrosion resistance.Reinforced square frame resists deformation under high pressure;brass/stainless steel bearings ensure smooth operation at temperatures from-20°C to+100°C.

Flexible Operation&Integration

Supports manual(locking quadrant),electric,pneumatic,or explosion-proof actuation.External linkage allows easy access for maintenance;compatible with standard square duct flanges for simple installation.

Wide Size&Application Range

Standard square sizes from 200×200 mm up to 2000×2000 mm(custom sizes available).Suitable for HVAC balancing,smoke exhaust,fire isolation,and industrial airflow control.

Main Applications

Commercial Buildings:HVAC systems for airflow balancing,zone control,and ventilation regulation.

Industrial Facilities:Chemical,pharmaceutical,food processing,and power plants for exhaust,flue gas control,and process air regulation.

Explosive Environments:When paired with explosion-proof pneumatic actuators,it is suitable for Zone 1/2 hazardous areas(ATEX compliant).

Fire&Smoke Control:Fire dampers and smoke exhaust systems for emergency isolation.

Technical Advantages Summary

Compared to single-blade dampers,the multi-vane square design offers higher precision,lower pressure drop,and better sealing performance.Its compact square form factor ensures seamless integration with square ductwork,while versatile actuation options make it adaptable to diverse control requirements.It is the preferred choice for efficient,reliable airflow management in square duct systems.