https://biz.prlog.org/tag/gas-phase/ gas-phase - Free business directory on PRLog.Org, latest companies listed first. 60 https://biz.prlog.org/purafil/ Purafil is the world leader in designing, engineering, and manufacturing gas-phase air filtration systems, air monitors, and UL classified granular media. Purafil maintains more than 30,000 installations worldwide.Wed, 10 Feb 2010 16:33:02 GMT