The ball valves are made by casting investment (silicasol casting).We have all kinds of design include: 1 pc screwed end ball valve、2 pc screwed end ball ball valve、3 pc screwed end ball valve、3 pc socket weld end ball valve、3 pc butt weld end ball valve、3 pc quick clamp end ball valve、3 pc flange end ball valve、2 pc flange end ball valve. Please feel free to contact us of you have any question about us and our products.