RDM
Multi blade regulation/adjustment damper
RDM - Multi blade regulating damper controls the airflow in HVAC systems by constricting its effective cross sections with counter-rotating blades.
Properties
•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 ATC 3
•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
Specifications
Multi blade regulation dampers RDM (hereinafter referred also shortely as the '"dampers'") are intended to be used in buildings – in heating, ventilation and air-conditioning (HVAC) systems. Controlled changes of the damper effective cross-section allow to adjust the air flow rate.The dampers consist of a rectangular steel body (frame), set of steel counter-running blades closed from the both sides by sealing end-cups from a composite material based on polyamide with suppressed flammability V-0 in accordance with UL 94 (halogen-free), blade shaft from steel with composite plain bearings (or stainless-steel plain bearings, on demand), steel rod mechanism, and from a manual control, or from actuator control (with actuator), or the dumper is just ready for actuator mounting (without actuator), respectively.The dampers are characterized by:• effort-less, smooth, silent running• rigid blades with good aerodynamics• two blade sizes to guarantee optimum filling of the cross-section• silicone-free design• wide application range