... , API 598, BS 6755, ISO 5208Material:1,BodyBonnet: Spheroidal graphite cast iron ,carbon steel, stainless steel. 2,Stem: carbon ... Rational structure,reliable sealing,excellent performance,pretty appearance.2.Co-radix alloy welded sealing surface,anti-wearing,erosion-proof ... satisfies all kinds of working requirements.Wenzhou ONO Valve CO.,Ltd is a professional manufacturer of valve.Our products include ...