LP Silencer range for Systemairs Axial fan range. For effective noise absorption in ventilation ducts.Casing are rolled, pre-galvanised sheet steel with spun end ringsincorporating tapped inserts for fixing.Absorbent material is acoustic grade mineral fibre with a layer oferosion resistant facing and is further protected by a sheet of pregalvanisedperforated steel.Moisture resistant lining available for wet conditions or criticallyclean applications.Type LP silencer bore diameters range from 315mm to 1600mm inlengths of equal to or twice the bore diameter (1D or 2D). Pressureloss for type LP silencers is the same as a plain duct.