forged steel flange gate valve ISO 9001:2000 OEM service available Standard : JIS DIN ... BS More Than 20 years experienc forged steel flange gate valve1MaterialDuctile cast iron,Grey cast iron ect2SandGreen sand,sodium ... Tolerance0.05mm6weight0.5-5000kg7surface treatmentPowder coating,Painting,Spraying,Galvanization8SizeDN32-DN20009StandardJIS,ANSI,DIN,GB,BS10PressurePN10 PN16We has its own QC team . ...