RDP Size D(mm) H(mm) L(mm) 100 99 200 243 125 124 200 268 150 148.9 200 293 160 158.9 200 303 200 198.9 200 343 250 248.9 200 393 315 313.8 200 458

RDN Size D(mm) H(mm) t(mm) 100 99 185 243 125 124 185 268 150 148.9 185 293 160 158.9 185 303 200 198.9 185 343 250 248.9 185 393 315 313.8 185 458

Regulating damper RD RDS RDX RDX-B Size D(mm) E(mm) H(mm) 80 79 35 170 100 99 35 170 125 124 35 170 150 148.9 35 170 160 158.9 35 170 200 198.9 35 170 250 248.9 35 170 300 298.9 35 170 315 313.8 35 170 355 353.8 35 170 400 398.8 35 170 RDH

BDB Size d(mm) H(mm) t(mm) 80 80 84 0.5 100 100 84 0.5 125 125 84 0.5 150 150 84 0.5 160 160 84 0.5 200 200 84 0.5 250 250 124 0.5 315 315 124 0.5

BDA Size d(mm) H(mm) t(mm) 80 97 88 0.5 100 99 88 0.5 125 124 88 0.5 150 148.9 88 0.5 160 158.9 88 0.5 200 198.9 88 0.5 250 248.9 128 0.5 315 313.8 128 0.5 355 353.8 97.5 0.5 400 398.8 97.5 0.5 450 448.8 122.5 0.5 500 498.8 122.5 0.5 560 55

Galvanized steel circular backdraught shutters with aluminium blades for mounting in between 2 ducts Application For airflow control in ventilation systems The aluminium blades will open when blades are exposed to overpressure and will shut again

The air flow rate is adjusted by turning the adjustment knob in order to change the aperture size of the adjustment cone formed by IRIX blades. Once the opening area is reduced, the air flow rate decreases and the total pressure loss caused by the dev

Regulation and measurement of air flow The regulation plates form a virtually ideal measuring orifice which enables an easy and reliable measurement of the air flow.