The disc-type welded metal bellows vacuum valve has the foll

Writer： admin Time：2021-10-14 22:39 Browse：℃

The disc-type welded metal bellows vacuum valve has the following characteristics: the pressure is lower than the atmospheric pressure, and the pressure drop on the valve flap cannot exceed 1 kgf/cm2. The working temperature of the medium depends on the process of using the device. The temperature generally does not exceed the range of -70 ~ +150℃. The basic requirement for this type of valve is to ensure a high degree of sealing of the connection and the compactness of the structure and gasket material. According to the medium pressure, vacuum valves 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."