DELTA series absolute filters for unidirectional flows DELTA series AB - AA models are mini-pleated absolute filters, for unidirectional airflow system applications. AB models are produced in a wide range of sizes with air flow rates ranging from 65 to 2700 m3/h. All the filters have an extruded anodized aluminum frame, 69 mm deep, with white epoxy painted micro-drawn aluminum protection grids on both sides. The mini pleat filtering pack, in micro-fiber glass, keeps the proper shape by means of continuous hot-melt spacers, to guarantee the lowest pressure drop and the flow laminarity. Any air by-pass risk is avoided sealing the media to the frame with a polyurethane elastomer sealant. Once the filter is installed, the tightness is guaranteed by a special half-round expanded polyurethane single piece gasket. Every single filter is checked with a scanning test according to EN 1822, then labeled and the test report is printed and packaged with the relevant filter.

DELTA series absolute filters for unidirectional flows 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 versions LV version Thanks to a patented fabric equalizer downstream, it is possible to obtain the perfect air distribution over all the filter surface, with world class air speed uniformity (even less than ±5% of the rated air velocity), never achieved with similar filters. All the other components of these...

DELTA series absolute filters for unidirectional flows • LS: “knife edge” version with the blade aligned to the frame • LSE: “knife edge” version with the blade external to the frame • RLS: “reverse liquid seal” version with gel gasket all around Technical features Product A..ls A..ls-est Frame depth mm 103 66 • LS: “knife edge” version is for gel seal structures • LSE: “knife edge” version, as above • RLS: for “knife edge” structures DELTA AB ls DELTA AB ls-est Technical features • AB - AA RLS ABH - AAH RLS “reverse liquid seal” version, can be mounted inside the...