Type EFST filter cartridges of filtration grade CMS are mainly designed for separating humidity (water vapour) from small compressed air flows (dry-type filtration). The properties of the desiccant are especially suitable for drying compressed air e.g. in point-of-use dryers. Filtration grade CMS is therefore used, if there are no liquid contaminants in the compressed air flow.

EFST..CMS filter cartridges consist of a loose desiccant filling, embedded between two coarse filter cloths and mesh screens. Furthermore a pleated general purpose filter ele-ment (Z) is fully integrated into the cartridge downstream in order to reliably prevent even the finest desiccant abrasion from leaving the filter cartridge. A transparent perspex cylin-der as a main body makes the desiccant filling visible, the pleated general purpose filter media is located between two stainless steel cylinders. Both desiccant and filter stage are completed / separated by plastic end caps. The adsorptive desiccant stage as well as general purpose filter stage is fully incorporated in a single, compact cartridge unit. As a result a further downstream dust filtration is no longer required.

The longish shaped desiccant bed ensures a long contact time of the compressed air with the desiccant and thus a low dew point and long lifetime. The integrated general purpose filter makes a downstream dust filtration by means of a complete separate dust filter unit superfluous (housing and element) and thus reduces differential pressure and costs - operating as well as investment costs.

All the features mentioned above contribute to a filter car-tridge which has a long service life (high adsorption capacity) combined with economic efficiency (low differential pressure, investment costs) and maximum operating safety (integrated design). This guarantees extremely low dew points and thus dry air.