SERIES 6A00 DEFLAGRATION FLAME ARRESTOR, CONCENTRIC VERSION, ISO 16852 CERTIFIED 6" END CONNS, 12" ELEMENT, EXPLOSION GROUP IIA (D); MAX. OPERATING PRESSURE: 17.4 PSI ABS. MAX OPERATING TEMPERATURE: =< 140 DEG. F; 1.4571 (SST) ELEMENT & RIM MATERIAL - NO CASING; NBR GASKET MATERIAL; HOUSING MATERIAL 1.4581 SST, ASME B16.5 150RF FLANGE CONNECTION, TWO G-1/2" PORTS ON ONE SIDE OF THE HOUSING; A2 SST CAP SCREW MATERIAL; WITHOUT TEMPERATURE SENSOR; ALUMINUM NAME PLATE / ENGLISH TYPE; NO ADDITIONAL SURFACE COATING;