1. The valve body is all precision casting valve body, the material 304 is up to standard, the appearance is fine, there is no trachoma, and each batch of castings has a furnace number mark, which is convenient for production tracking and material inspection.

2. The valve body is made of ZG250-485 material that meets the national standard, and it has gone through 15 processes from the original iron to the valve body forming.

3. The butterfly plate is processed by CNC lathe, and the sealing ring is a soft and hard multi-layered metal ring, which has the dual advantages of metal and elastic sealing, ensuring excellent sealing performance in high temperature and low temperature environments.

4. The valve stem is made of stainless steel, which has been quenched and tempered to improve the strength of the valve stem and reduce the opening and closing and leakage problems caused by the deformation of the valve stem.

5. After the product is produced, each product is painted three times with lead-free paint on the primer and topcoat to ensure the brightness and rust resistance of the product appearance.

6. After the product is pressed and debugged, the turbine adjusting screw is processed again, and the left and right lengths are adjusted to be consistent before delivery. The turbine adjusting screw of each product is equipped with a protective nut to protect the adjusting screw from damage.

7. The valve plate is thick, the valve stem is thick, the pin is thick, and the valve seat is finely processed, flat and free of welding scars.

8. From the blank to the finished product packaging, each link is subject to quality inspection.