cast steel gate valve ISO9001:2000 Approved Process:precision casting Standard:JIS,DIN,ASTM,BS OEM service available cast steel gate valveWe are a foundry which ... or drawings9.professional service 10.surface treatment,polishing,machining,machining center,plating,HeatTreatment,ect. description materialstainless steel, cast iron, pig iron, carbon steel, alloy ...