DELTA series absolute lters for unidirectional ows Technical features Product Efciency MPPS Suggested nal pressure drop Maximum pressure drop Maximum operating temperature Maximum relative humidity ATEX version on request DELTA series ABH-AAH absolute lters are minipleated and of limited depth, studied for applications in unidirectional air ows areas. The ABH models are made in a wide range of sizes with air ows from 150 to 2260 m3/h. All the lters have an extruded anodized aluminum frame, with micro drawn white epoxy painted protective grids. The ltering medium is made of micro-ber glass, water-proof and re resistant; the mini pleats have continuous thermoplastic spacers, the sealant is polyurethane elastomer. It has a one-piece gasket positioned in its own seat. Thanks to the low pressure drop of the lters, the energy consumption level of the fan is very low. All lters are tested individually and carry a label indicating the performance levels. Filtering surface Initial pressure drop Product ready in Stock / *1 m3/s x 10-3 = 1 l/s Typical curves Technical draft Nominal air flow rate % Nominal air flow rate % If filters are used in turbulent flows with high air flow rate, efficiency levels may drop by one class; in case of any doubt consult our technical office. Special type: low pressure drop version LPD available.