1. Standard stainless steel lockable handle minimizes the possibility of accidental operation

2. The metal-to-metal structural design of the body & cover ensures that the lining will not be squeezed or deformed by force

3. Integrated anti-blowout stem and ball design minimizes the risk of stem/ball failure due to wear damage

4. U-shaped replaceable seat

5. Steel parts with T-grooves and grooves, so that the lining is firmly locked, fully adapted to the vacuum environment

6. All flow parts are fully coated with permeable PFA material as an anti-corrosion barrier

7. Wider conical lining connection design, even in the case of extreme thermal cycling can maintain a complete seal, to meet the low escape standards