Series 6A00 Deflagration Flame Arrestor, Concentric Version, ISO 16852 Certified; DN400 Line Size, DN800 Element, Explosion Group IIA (D); Maximum Operating Pressure: 17.4 PSI absolute, Maximum Operating Temperature: =< 140F; 1.4571 Stainless Steel Casing And Element Material, 1.4581 Stainless Steel Rim Material; FKM Gasket Material; Carbon Steel Housing Material, ASME 150 RF Flanged End Connections, One G-1/2" Port On Each Side Of The Housing; 8.8 Zinc Plated Cap Screw Material; Without Temperature Sensor; Aluminum Name Plate / English Type; Signal Blue (RAL 5005) Surface Coating