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RDM Multi-Blade Regulation/Adjustment Damper

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RDM Multi-Blade Regulation/Adjustment Damper

A high-performance, low-torque multi-blade damper for precise airflow control in large rectangular ducts. Features counter-rotating aerodynamic blades for minimal pressure drop, smooth operation, and low noise.

RDM

Product Description

Key Features & Benefits

  • Aerodynamic Design

    Counter-rotating blades minimize turbulence, pressure drop, and noise.

  • Low Torque Operation

    Smooth, low-force actuation extends actuator life and allows manual control.

  • Robust Construction

    Galvanized steel body & blades. Optional AISI 304/316L stainless steel.

  • High Fire Safety

    Class A1 reaction to fire. Halogen-free, V-0 rated composite end-cups.

  • Quiet & Durable

    Composite plain bearings ensure silent, long-lasting, maintenance-free operation.

  • Wide Size Range

    From 200x200 mm to 2000x2000 mm for main ducts and large AHUs.

  • Flexible Control

    Manual, ready for actuator, or pre-equipped with electric actuators for BMS.

Technical Specifications

Size Range

200x200 mm to 2000x2000 mm

Body Length

160 mm

Max. Air Velocity

12 m/s

Max. Duct Pressure

±1500 Pa

Leakage Class

Class ATC 3 (Casing)

Operating Temp.

160 مم

Installation & Control

Mounting Position

Install with blade axis horizontal for lowest torque and best performance.

Flange Connection

30 mm flange for bolting to standard rectangular duct flanges.

Actuator Space

250 mm clearance required along the main shaft axis.

Flange Alignment

Duct flanges must be flat and parallel to prevent damage.

Control Options

Manual handle, actuator-ready, or with pre-mounted electric actuator.

Use Cases

  • Industrial AHUs
  • Commercial Main Ducts
  • Hospital Ventilation
  • Car Park Ventilation
  • Theaters & Auditoriums
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