Disc welding vacuum bellows vacuum valve function

Writer： admin Time：2021-10-14 22:38 Browse：℃

The action rate of the disc-type welded metal bellows vacuum valve is the amount of gas that flows through the leak to the low pressure end (or low concentration end) in a unit time under the specified conditions under high pressure (or high concentration), divided into Dynamic leak rate and static leak rate. The pressure rise rate is determined by measuring the pressure value that rises with the increase of time after the pumped container is isolated from the vacuum pump. It is a static concept. In addition to the leakage rate of gas permeating into the equipment through the welds, seals, and material bodies, the pressure rise rate also includes the desorption of the adsorbed gas of each device inside the equipment and the vapor pressure of other substances (such as oil and grease). Therefore, the two concepts are different. The leak rate is included in the boost rate, and its value is only a part of the boost rate. In the actual measurement process, the pressure rise rate is often used to detect, and the pressure rise rate is multiplied by the measured volume as the leak rate."