... steel gate valve ISO9001:2000 Approved Process:precision casting Standard:JIS,DIN,ASTM,BS OEM service available cast steel gate ... 1.ISO9001:2000 Approved 2.OEM service available 3.Materials: stainless steel,cast iron,pig iron,carbon steel,alloy steel ... center,plating,HeatTreatment,ect. descriptionmaterialstainless steel, cast iron, pig iron, carbon steel, alloy steel, non-ferrous, grey iron, ductile ...