Cast Iron Ball Valve with Plate or Painting or Galvanized Surface
Cast iron: cast iron is an iron-carbon alloy containing more than 2% carbon

Cast iron can be divided into: 1, gray cast iron 2, white cast iron 3, malleable cast iron 4, nodular cast iron 5, vermicular cast iron 6, alloy cast iron

Generally speaking, the cast iron valve we use is nodular cast iron, which is obtained by spheroidizing the molten iron of gray cast iron. The precipitated graphite is spherical, referred to as ductile iron. It has higher strength, better toughness and plasticity than ordinary gray cast iron