... 2advanced equipment&skilled worker 3strict QC OEM precision butterfly valve body casting1:OEM service available2:Material: aluminum,grey iron, ductile iron ... iron,zinc ,bronze, copper, brass,stainless steel3:Standard: ISO, ANSI, ASTM,, JIS, DIN, GB4:Weight Range: 0.1kg-2000kg5:Process Type ... : 0086-411-83701520Fax:0086-411-83704610 OEM precision butterfly valve body casitng