Casting Part,Filter body,Valve body. GG20,GG25,GGG40.Green sand or Resin sand technic.Machined ... casting part.Shot blast surface. Features to Casting Par,Filter body,Valve body: 1.Material :GG20,GG25,GG30 or GGG40.2.Unit ... industry,ship industry and others.10.Representative product:gate valve body,butterfly valve body,ball valve body,Filter body,pump body.