The water vapor to be pumped should be compressed in the compression chamber until the exhaust valve is open. If the temperature inside the pump is assumed to be 60 ° C, the saturated vapor pressure of water at this temperature is 20,000 ps. Once the water vapor reaches the above pressure, it will start to condense into water, but it will not be able to push the exhaust valve at 20000 Pa because the exhaust valve is pressed against the atmosphere and the spring of the exhaust valve, that is, the pump Cavity internal pressure to be compressed to more than 120000 Pa to open the exhaust valve, water vapor compression, to the end of the compression has all condensed into water, and mixed to the vacuum pump oil inside. In order to meet the requirements of extracting moist air, it will not be polluted with water vapor. Therefore, the oil-sealed vacuum pump to be equipped with gas device. Its principle is to put a certain amount of air in the compression process to increase the pressure of the mixed gas. The pressure of the mixed gas is the sum of the partial pressure of air and the partial pressure of water vapor. When the partial pressure of steam has not reached the vacuum pump temperature Of the saturated vapor pressure, the pressure of the mixed gas has exceeded the pressure of the vent valve to open the vent valve so that the vapor is too late to liquefy in the pump chamber to be excluded from the pump. Search Keyword: More Valve Technical Articles
A4 Fast Dry Paper,A4 Sublimation Paper,Heat Sublimation Paper,Dye Sublimation Transfer Paper
GREEN-LIFE PAPER LTD , https://www.sjgreenlifepaper.com