... . GG20,GG25,GGG40.Green sand or Resin sand technic.Machined casting part.Shot blast surface. Features to Casting Par,Filter body,Valve body ... ,98kgs,150kgs,198kgs and 278kgs.3.Moulding processing:green sand or resin sand.4.Melting facilities:cupola furnace or medium frequency induction ... product:gate valve body,butterfly valve body,ball valve body,Filter body,pump body.