In any conditions, untreated air contains a lot of impurities, such as: oil, water, solid particles and so on. If you do not remove these impurities, it will affect the life of equipment, and even threaten the normal operation of the system. The compressed air is the main security energy of the large-scale industrial production, so precision filtering of the air is particularly important Grade DD - General Purpose Protection Particle removal down to 1 micron including coalesced liquid water and oil, providing a maximum remaining oil aerosol content of 0.6 mg/m3 (<0.5 ppm) @ 21°C.
Grade PD - High Efficiency Oil Removal Filtration Particle removal down to 0.01 micron including water and oil aerosols, providing a maximum remaining oil aerosol content of 0.01 mg/m3 (<0.01 ppm) @ 21°C. (Precede with Grade GP filter).
Grade QD - Activated Carbon Filtration Oil vapour and hydrocarbon odour removal, giving a maximum remaining oil content of <0.003 mg/m3 (<0.003 ppm) (excluding methane) @ 21°C. (Precede Grade AC with Grade HE filter).
Grade DDp - General Purpose Dust Filtration Dust particle removal down to 1 micron.