Below is the standards that our butterfly valves reference to Design:API 609\BS5155\EN593\GB/T12238\DIN3354 Face to Face:API609\ DIN3202 K1\BS5155\EN558\ISO5752\ASME B16.10 Flange End:ASME B16.1 CLASS 125\ASME B16.5 CLASS 150\ASME B16.47\BS EN 1092 PN6/PN10/PN16\JIS B 2220 5K/10K/16K\BS 10 Table D/Table E Top Flange:ISO5211(According to customer’s needs) Inspection:API598\EN12266-1\ISO5208 Size Range:DN50-DN1600/2”-64” Temperature:-40℃ to +200℃ (Depending on pressure, medium and material) Medium:freshwater\ sewage\seawater\air\vapor\food\oils\medicine\ alcohol\salt… **Main Material List BODY:CI, DI, WCB, WCC, LCB, LCC, CF8, CF8M, CF3, CF3M, C95400, C95800, SAF2205, SAF2507, F51, 1.4529…… SEAT:BUNA-N, NBR, EPDM, HYPALON, NEOPRENE, VITON, FKM, PTFE, RPTFE, TEFLON, NATURAL RUBBER…… DISC:CF8, 304, CF3, 304L CF8M, 316, CF3M, 316L, SAF2205, SAF2507, F51, 1.4529, C95400, C95500, C95800, MONEL….. STEM:F410, F420, F430, F431, F304, F316, MONEL 400, MONEL K500