Groth Biogas Equipment Click on desired biogas equipment to view features, specs, options and download documents. Digester Cover Equipment 8800SDV Safety Diverter Valve 6100 Gauge Hatch – Locked Down Hinged Cover 8200 Roof Manhole Cover Flame Control 8800 Pressure-Vacuum Valve & Flame Arrester 8820A Pressure – Vacuum Valve & Flame Arrester (pipe-away) 7622 Flame Check 8500 Flame Trap Assembly 8400 Pressure Relief & Flame Trap Assembly 7618 Biogas Flame Arrester, Vertical Installation 7628 Biogas Flame Arrester, Horizontal Installation Gas Control Equipment 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 Relief Valves 8800 Pressure-Vacuum Valve & Flame Arrester 8820A Pressure – Vacuum Valve & Flame Arrester (pipe-away) 1200A Biogas Pressure – Vacuum Relief Valve 1220A Biogas Pressure – Vacuum Relief Valve with Pipe-Away 2300A Biogas Pressure Relief Valve – Weight Loaded 12E-TWW-0 Biogas Pressure – Vacuum Relief Valve Vent to Atmosphere 12F-TWW-0 Biogas Pressure – Vacuum Relief Valve with Pipe-Away Waste Gas Burners 8392B Waste Gas Burner- Flame Front Ignition Technology 8391 Waste Gas Burner- Candlestick, Auto / Manual Ignition