1. It is generally required that the interior of the electric ball valve shall be coated with anti-corrosion epoxy resin (i.e. plastic spraying treatment).
2. Rust removal of the inner wall of the electric ball valve by sand blasting and other methods meets the SA2.5 standard of GB/T8923, which is the metal color of the pipe wall.
3. Rust proof materials used inside the electric ball valve must have a health license and be harmless to human body.
4. The surface hardness is good, and there is no scratch with 2H pencil.
5. The interior of the electric ball valve usually needs five processes of spraying. The first primer shall be finished within one hour after sand blasting and rust removal, and the next spraying shall be carried out after the surface is dry.
6. Impact resistance