... start-up 2XZ Series Direct-drive Rotary Vane Vacuum Pump 1. Discription of Rotary Vane Vacuum PumpThis series ... used as the forepump, process pump or titanium pump of booster pump, diffusion pump, and molecular pump. The pumps are also used ... . d. 2XZ-2 with small caliber, 2XZ-4 pump with vacuum drying oven, freezing dry machine and printing ... and KF joints.3. Parameters data Double stage acuum pump