round gate frame with cast iron or ductile iron Sealing: ... DN:200~3000PN:0.5/1.0mpaGate frame with cast iron or ductile ironSealing:cast brassStem:stainless steelOperator ... We can produce gate, check, and butterfly valves etc .with the materials of ductile iron, carbon steel, , stainless steel ... order. Our products are designed and manufactured in accordance with the standards of GB, ASME, ANSI, API, BS ...