Regulating damper with a turning cut-off blade. Sealing class past closed blade = 0
Regulating dampers are used to balance a system to the desired airflow. The damper blade is designed so that a certain flow of air can always leak through even if the damper is closed.
The blade is stepless and adjustable between 0 and 90 degrees.
The blade is designed to generate a minimum of noise.
The blade is set via a knob in a protective cup.
Derek Grimshaw (verified owner) –
Very pleased and easy to fit, good quality.