The disc-type welded metal bellows can be divided into four

Writer： admin Time：2021-10-14 22:43 Browse：℃

The disc-type welded metal bellows can be divided into four groups according to the pressure of the medium. The vacuum valve can be divided into four groups: 1) Low vacuum valve: medium pressure p=760~1 mmHg; 2) Medium vacuum valve: p=1×10-3 mmHg . 3) High vacuum valve: p=1×10-4 ~1×10-7 mmHg; 4) Ultra-high vacuum valve: p≤1×10-8 mmHg."