Grade A – Activated Carbon Filtration Oil vapor and hydrocarbon odor removal, providing a maximum remaining oil content of <0.003 mg/m3 (<0.003 ppm) @ 21°C (60°F). (Precede with Grade H filter). Filter supplied with manual drain and without dual indicator.
Grade G – General Purpose Protection Particle removal down to 0.1 micron including coalesced liquid, water and oil, providing a maximum remaining oil aerosol content of 0.03 mg/m3 (0.03 ppm) @ 21°C (60°F). Filter supplied with automatic drain and dual indicator.
Grade H – 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 (60°F). (Precede with Grade G filter). Filter supplied with automatic drain and dual indicator.
Grade D – General Purpose Dust Filtration Dust particle removal down to 1 micron. Filter supplied with manual drain and dual indicator.