SRSD 200/600 – Spigotted circular attenuator – Helios A simple yet very effective way to reduce system noise in circular ducting, ideal for installing in the duct between the fan and the ventilated area. Supplied with spigots for easy installation in the circular ducting. Supplied in 9 diameters from 100mm to 400 mm. Sizes Available Available from 100mm to 400mm – select the size to suit the fan spigot or duct size. Reference Attenuation in dB at Hz Average Nominal Dimension mm 250 500 1000 2000 4000 8000 attenuation weight kg L Dia Spigots SRSD 100/600 12 20 37 47 36 12 18 4.7 600 202 96 x 40 SRSD 125/600 12 22 36 44 32 26 20 5.3 600 227 123 x 40 SRSD 150/600 8 15 31 33 22 12 13 6 600 252 146 x 40 SRSD 160/600 8 15 31 34 22 12 13 6.2 600 262 156 x 40 SRSD 200/600 7 14 30 25 15 11 12 7.3 600 302 196 x 40 SRSD 250/600 6 12 25 18 10 7 10 8.6 600 327 223 x 40 SRSD 315/600 6 10 18 13 10 6 8 10.3 600 417 313 x 40 SRSD 355/600 6 10 16 12 9 6 8 11.5 600 457 353 x 40 SRSD 400/600 5 10 14 11 8 6 8 12.6 600 502 398 x 40 PRODUCT PDF SRSD
