Pre-filter Dpengineers prefilters are used for coarse pre-filteration, provision against insects, textile fibres, coarse applications. Dpengineers prefilters are available in the range of 15 to 20 micron (g3, g4 class) and 10 micron (f5, f6) Low initial pressure drop light in weight and easy to handle high cost / performance ratio high dust holding capacity cleanable / washable Applications: air-conditioning systems. Industrial ventilation systems. Coarse filtration and pre-filtration. Type, flange or box Frame, galvanized steel / crca powder coated / aluminium anodized / ss 304 Separators, aluminium Filter mediahdpe media / non woven synthetic media Gasket, neoprene rubber gasket Bs en 779 class, g3, g4 Filter efficiency/arrestance, g3, g4 50 ? 80% arrestance f5, 80- 90 % arrestance Eurovent class, eu 3, eu 4
