... can be used as the forepump, process pump or titanium pump of booster pump, diffusion pump, and molecular pump. The pumps are also used in making ... a. Samll volume, low weight and low noise b. Equipped with gas ballast valve to pump a little water vapor. c. Equipped ... -2 with small caliber, 2XZ-4 pump with vacuum drying oven, freezing dry machine and printing machine. e.Euipped with small caliber ...