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 Manual Drip Trap 8530 Thermal Shutoff Valve