Filter counter-frames CT Technical features Product Strong galvanized steel sheet modular CT series counter-frames are used to house low, medium and high efficiency filters and absolute filters, according to the models. Models CT 10 - 20 - 30 can house the following types of filters: • flat and pleated pre-filters • soft pocket Filtra-Pak filters • rigid pocket Filtra-Pak filters • sigma high efficiency filters (flanged version). Models CT 40 - 42 - 50 - 52 are used to house Delta series absolute filters or Beta series semi-absolute filters 149 mm or 292 mm thick. Thanks to their modularity, they can also be used to create filtration walls for ducted turbulent flows and for air treatment units. They are fitted with an expanded neoprene closed cell gasket. Robust construction and top quality finishing are the main features of all CT counter-frames. Technical draft Type Dimensions (mm) Weight CT Filters dimensions (mm) ✓ Product ready in Stock