Galvanized steel ventilation aperture silencer PVAP

mineral wool

PVAP is a circular straight silencer with pod. Nominal insulation thicknesses are 50, 100 or 150 mm. Attenuation material is mineral wool. The PVAP's are made from galvanizes steel sheet and an inner tube made of sheet steel with small openings to be able to withstand mechanical cleaning and at the same time not interfere with the insertion loss. The space between them is filled with mineral wool and a nonwoven cloth is inserted between inner tube and the attenuation material, to prevent fibres from the insulation getting into the duct system. Silencer can be cleaned by rotating nylon brushes, vacuum cleaner or damp cloth. Tested according to ISO 7235 standard. Fulfils tightness class C. Dimension - 250 - 630 Length - 600 - 1500 Material - GALV Type - 100, 50