... ISO9001, 2008, 14001, 2004, 2007 and OHSAS18001 Gas type: Natural gas, biogas, CBM etc.Gas Generator Set Features:1. There should not contain ... liquid water or particulate matter(impurity <5um)2. Gas ... .3. Sulfide content not more than 250mg/m³ , Gas should be desulfided when sulfide content surpass fixed content. (marks ...