BETA series semi-absolute filters for duct flows BETA series LMS-KMS-LNS-NS semi-absolute filters offer very high filtration efficiency with low pressure drop for low energy consumption. All these filters are manufactured with the mini-pleat technology, using glass fiber paper and continuous hot melt separators. LMS - KMS: pleated filters with MDF wooden frame (LMS) or galvanized steel frame (KMS). Two different depth - 149 and 292 mm - are available, to satisfy also higher air flow rate demands. LNS - NS: pleated compact filters, V-type, available with MDF wooden frame (LNS) and galvanized steel frame (NS). These version allow to work with very high air flow, without any pressure drop increase and keeping the same depth as the LMS - KMS versions. Type Dimensions (mm) Nominal air flow rate Q Filtering Initial pressure LMS KMS 6 610 762 292 5000 1389 30 210 ✓ Product ready in Stock / *1 m3/s x 10-3 = 1 l/s Typical curves Technical draft