Gas Control Equipment Click on desired biogas equipment to view features, specs, options and download documents. 8110 Back Pressure Check Valve 8170 Well-Type Manometer 8330 Sediment Trap 8600 Foam Separator 8500 Flame Trap Assembly 8450 Drip Trap – Automatic 8490 Electrically Actuated Drip Trap 8460 Drip Trap – Manual 8530 Thermal Shutoff Valve