Ball valve stem
 

We are a factory producing all kinds of accessories, also has its own foreign trade company, has ten years of production experience.

Its process is: (1) to wax model 2. Ammonium chloride hardening layer 3. The heating melting wax models become a shell mould 4. Burn molding shell 5. Steel, refined 6. Shell mould casting 7. Sprue cutting 8. Nondestructive test 9. Surface polishing and spray paint 10. Phosphating antirust/test 11. Packing and shipping of finished product.)