Spectra Drop Shield Reverse pocket (SDSRP) filters are unique premium hydrophobic pre-filters in reverse air flow direction where space is a constraint. The SRP pocket filters 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 air borne particulate matter but also snow, mist and fog acting as a filter and a coalescer in one. SDSRP filters are specially designed for the elimination of free water and air borne salt crystals. Where subsequent final filters are placed, they protect them not only from coarse dust but also from running in wet conditions. The SDSRP filters do significantly prolong the filter lifetime of the final filter and increase their operational safety.

Spectra-Pre ROD filters are used for supply, exhaust and circulating air filtration in ventilation systems which built for high dust holding capacity, used in all industrial, HVAC and pharmaceutical application. Where subsequent final filters are placed, they protect them from coarser dust and fog, thus significantly prolonging their life and increasing their operational safety.

These are robust filters made of some layers of synthetic mesh that are non woven, sandwiched in between. The pleats are V shaped and rounded well to increase the dust arrestance of filters. Media is further enforced by metal expanded mesh to give extra rigidity to pleats so that peats would retain their shape at higher pressure drop.

Spectra Eco Pleat is specially designed to protect coarser filters with high dust arrestance. Designed with moisture resistance cardboard frame, engineered with expanded metal backed synthetic media, ECO pleat is fully incinerable.