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RKALM Square Regulation Damper

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RKALM Square Regulation Damper

A lightweight, thermally efficient aluminum damper for rectangular ducts. Features hollow, insulated blades with an optional thermal break, ideal for minimizing heat transfer in building facades or wall-mounted applications.

RKALM

Product Description

Key Features & Benefits

  • Lightweight Aluminum

    Full anodized aluminum construction for easy handling and corrosion resistance.

  • Thermal Break Option

    Hollow blades with foam insulation and thermal bridge break (U-value down to 1.3 W/m².K).

  • Good Sealing

    Available in internal leakage Class 2 (better) or Class 3 for effective airflow control.

  • Wall-Mount Capable

    Can be installed directly onto a wall as a shut-off damper for air terminal units.

  • Easy Manual Override

    Electric actuators feature a manual override (button & ring) for emergency operation.

  • Omni-Directional

    Can be installed in any position (horizontal, vertical) without performance loss.

Technical Specifications

Size Range (A x B)

200 x 100 mm to 2000 x 2000 mm

Blade Width

100 mm (Standard)

Internal Leakage

Class 2 or Class 3 (EN 1751)

Thermal Transmittance

Up to 1.3 W/m².K (with thermal break)

Max. Air Velocity

8 m/s

Temperature Range

-20°C to +50°C (Damper body)

Model Variants

Model_Code Key Property Best For
T2
Standard sealing. Internal Leakage Class 2 (Better).
General applications requiring good airflow control.
T3
Basic sealing. Internal Leakage Class 3.
Applications where some leakage is acceptable for cost-efficiency.
T2U1 / T3U1
Thermal break. U-value ~1.3 W/m².K. Excellent insulation.
External walls, facades. Critical for preventing condensation & heat loss.
T2U2 / T3U2
Thermal break. U-value ~2.66 W/m².K. Good insulation.
Applications requiring improved insulation but with a higher U-value limit.

Installation & Control

Mounting Options

Installed in duct or directly mounted onto a wall for terminal unit shut-off.

Actuator Clearance

Requires 250 mm of free space for actuator installation and operation.

Actuation Types

Mechanical (manual) or electrical actuation with optional manual override.

Environment Limitation

Not for outdoor, high humidity, freezing, or explosive atmospheres.

Use Cases

  • Building Facade & Perimeter
  • Hotel & Office Wall Units
  • Hospital Patient Rooms
  • Ventilated Façade Systems
  • Shopping Mall Atriums
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