DD class is suitable for filtering large amounts of liquid and 1 micron size of the aggregate (5ppmw / w residual oil content)

Level 1 two stainless steel pipe, 10 micron mechanical separation

Level 2 Deep fibrous media filters 3 micron solid and liquid particles

PD grade for coalescence very small water vapor and oil mist can filter as small as 0.01 micron solid particles (0.01ppmw / w residual oil content)

Level 1 Multilayer Fiber Media and Media Filter, filter out larger particles, pre-filter before air enters level 2 filtration

Level 2 Multilayer Adhesive Fiber Media, filter out small aggregates

Inside and outside the filter are anti-corrosion, the outer coating closed foam sleeve