Activated Carbon Manufacturer - Puragen Activated Carbons Puragen Activated Carbons is a leading activated carbon manufacturer for air, water, automotive, pharmaceutical, gold recovery and other applications. Activated carbon filtration and purification solutions that provide cleaner water, fresher air and better living. Air Filtration. Air is critical for survival of all living things. Puragen Activated Carbons products filter and treat... Automotive. Vehicles produce harmful fuel system emissions. ...