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Aluminium Aerofoil Damper

Aluminium Aerofoil Damper

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Aluminium Aerofoil Dampers are designed for high-performance airflow control in Air-conditioning and Ventilation systems. These dampers are engineered to provide precise regulation of air volume, pressure, and distribution while minimizing noise and pressure drop. The aerofoil-shaped blades significantly reduce turbulence and enhance energy efficiency, making them suitable for supply, return, and exhaust air applications in commercial, industrial, and institutional HVAC systems.

Aerofoil dampers can be manual, motorized, or integrated into automated building management systems for accurate modulation of airflow. Unlike gravity or backdraft dampers, aerofoil dampers are actively controlled and operate through a blade-linkage or gear mechanism to modulate the air opening from fully closed to fully open as per system requirement.

These dampers consist of multiple aerofoil-profile blades, mounted horizontally or vertically, and designed to rotate smoothly about their axis. The blades and frame are manufactured from high-quality extruded aluminium profiles, offering superior rigidity, corrosion resistance, and durability.

Aerofoil Damper

Aerofoil dampers allow precise airflow control across ducts, AHUs, plenums, and ventilation openings. Built with aerodynamically optimized blades, they provide low pressure drop, reduced noise levels, and smooth airflow characteristics even at high velocities. They are commonly used in systems requiring modulation, balancing, zoning, or shutoff capability.

Aerofoil dampers are suitable for system velocities up to 2500 fpm (12.5 m/s) and static pressures up to 4 in. wg (1.0 kPa) depending on model and construction.

Damper selection begins by determining construction type based on system velocity, differential pressure, control requirements, and installation conditions.

Factors to Consider While Selecting Aerofoil Dampers:

  • System air velocity and static pressure

  • Required control action (modulating / open-close / manual or motorized)

  • Blade orientation (horizontal or vertical)

  • Mounting configuration (duct insertion, flange mount, wall / plenum mount)

  • Leakage class requirement (as per AMCA / IS standards)

  • Actuator type (electric / pneumatic) and fail-safe requirements

  • Temperature and environmental conditions

Operating Principle:

The Aluminium Aerofoil Damper regulates airflow by rotating its aerofoil blades simultaneously through an interconnected PVC gear mechanism. The smooth aerofoil profile ensures:

  • Low turbulence

  • Low noise

  • Optimized pressure drop

In a modulating configuration, a control signal (0–10 V, 2–10 V, or pneumatic signal) continuously adjusts the blade position to maintain desired airflow or pressure.

In open/close applications, the actuator drives the blades fully open or fully shut. When closed, blade-edge seals and frame seals reduce air leakage to meet system specifications.

Features / Advantages:

  • Rigid, durable construction using high-quality extruded aluminum profiles for frame and blades

  • Aerofoil blade design for low noise, low pressure drop, and high efficiency

  • Blade thickness typically 1.0–1.2 mm, offering lightweight yet robust performance

  • Precision blade gear mechanism in PVC for smooth, synchronous operation

  • UV-stable PVC bearings for friction-free, long-lasting, rattle-free blade movement

  • Optional blade-to-blade and blade-to-frame seals for low leakage performance

  • Compatible with manual, electric, or pneumatic actuators

  • Wide operating range suitable for high velocities and pressures

  • Corrosion-resistant and ideal for coastal or humid environments

  • Flange or sleeve mounting options for easy installation in ducts or openings

  • Custom sizes available as per project requirements

Applications:

  • Air Handling Units (AHU)

  • Supply and Return Air Ducts

  • Variable Air Volume (VAV) systems

  • Mixing and Bypass sections

  • Pressure control zones

  • Industrial ventilation systems

  • Cleanrooms and controlled environments

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