Reduces Exponentially Perceived Noise (EPNdB) without impeding equipment performance. Designed to take explosive air exhaust noise discharged from valve exhaust ports and muffle it with optimized Constant Velocity (CV) flow factor. Exhaust air flows softly to atmosphere free of noise, oil fog, and other contaminants - helping to maintain a clean, comfortable and productive work environment. Features a unique obstruction-free expansion chamber, with corrosion-resistant aluminum end covers, zinc-plated steel components and a cellulose fiber element. Recommended for general purpose air exhaust applications for pressures up to 125 psi (8.6 Bar). Other sizes available please contact us.