round gate frame with cast iron or ductile iron Sealing:cast brass Stem:stainless steel Applied to water treatment . DN:200~3000PN:0.5/1.0mpaGate frame with cast iron or ductile ironSealing:cast brassStem:stainless steelOperator:manual or electric Products: We can produce gate, check, and butterfly valves etc .with the materials of ductile iron, carbon steel, , stainless steel, ,cast iron and ...