Duct Dampers

The DD Series Duct Balancing Damper was designed for duct installations to balance/regulate airflow.
All spindles revolve in low maintenance nylon bushes which are fitted within pressed inserts. Precise blade positioning is achieved via a robust dual-purpose quadrant and spindle assembly, operating the linkage mechanism which is located outside of the airstream.

Unless stated otherwise, flange  models suitable for class A & B of DW144, spigot models suitable for class A B & C. Conforms to HVCA specification DW144. Conforms to Eurovent 2/2 classes A - C. Independent performance tests for pressure drop, leakage and airtightness. Test reports 143, 145 and 146 refer