... is used to pump gas and vapor, which suction pressure reaches 33mbar absolute pressure,(97% vacuum percentage ... ). When the vacuum pump is operated under suction pressure lower than 80mbar for a long time, ... . When an air ejector is equipped, the suction pressure can reach 10mbar, and the ejector can ... , the maximum pressure reaches 0.26Mpa Liquid ring vacuum pump and compressor is widely used in ...