1. The valve body is precision casting valve body or the whole section of seamless steel pipe, the material performance is up to standard, the appearance is fine;

2. The butterfly plate is processed by CNC precision machine tool, with high precision;

3. The sealing ring is soft and hard multi-layer metal ring, with the dual advantages of metal and elastic sealing, to ensure excellent sealing performance in high temperature and low temperature environment;

4. The valve stem is made of stainless steel 420, and the strength of the valve stem can be doubled after tempering treatment;

5. The worm gear adjustment screw of each product is equipped with a protective nut to protect the adjustment screw from damage;

6. Each valve is tested for shell and double seal pressure according to national standards;

7. According to the customer's working conditions, it can do two-way sealing and all-metal hard-to-hard sealing.