Series 6A00 Deflagration Flame Arrestor, Concentric Version, ISO 16852 Certified; 3" End Conns, 6" Element, Explosion Group IIA (D); Max. Operating Pressure: 16 PSI Abs;Max. Operating Temperature: '=< 428 Deg. F; 1.4571 (SST) Casing & Element Material, 1.4581 (SST) Rim Material; FKM Gasket Material; Housing Material 1.4581 SST, ASME B16.5 150RF Flange Connection,;Two G-1/2" Ports On Each Side Of The Housing; A2 Stainless Steel Cap Screw Material; Without Temperature Sensor; Aluminum Name Plate / English Type; No Additional SuRFace Coating