RDM – Multi blade regulating damper controls the airflow in HVAC systems by constricting its effective cross sections with counter-rotating blades.

Characteristics

• For regulation/adjustment of the airflow
• Very small torque needed to operate the damper
• Manual or electrical actuating
• Standard range from 200 × 200 mm to 2 000 × 2 000 mm
• Leakage acc. EN 1751:
  - casing leakage: class C
• Made of galvanised or stainless steel
• Minimised pressure drop and noise:
  - two blade sizes
  - aerodynamic blade profile
  - casing leading edge cut at angle where appropriate

• Includes a flange for connection to the duct
• Silicone free, halogen free, lead free
• UV stabilisation and flammability suppression class V-0
• Casing, blades and mechanics reaction to fire class A1
• Offered also in design for potentially explosive atmospheres