Drop Safe (DS) rigid filters, distributed by Kaydon Filtration, serve as efficient pre- or final filters in air intake systems of gas turbines, in any environmental condition (including offshore, marine) and in any climate (including tropical). They efficiently remove airborne particulate matter as well as snow, mist and fog, acting as a filter and a coalescer in one. DS rigid filters are specially designed for the elimination and drainage of free-water and airborne salt crystals. Where subsequent final filters are placed, they protect them not only from coarse dust but also from running in wet conditions, thus significantly prolonging their life and increasing their operational safety.

The thermally bonded proprietary synthetic media for DS rigid pocket filters is manufactured by Filtrair^®, a Filtration Group company. The depth-loading media is of progressive structure for high dust-holding capacity and contains an added hydrophobic treatment and tackifier throughout the medium depth to repel water and retain their operational safety.

The DS filter media is not only for particle separation (e.g. as per EN779 & ASHRAE 52.2) but also for water droplet separation. The latter is relevant when operating DS filters with air-containing free water in droplet form (fog, mist, froth, salt water spray) to avoid dissolved solids penetrating the filter in liquid form.