A liquid band vacuum pump is easy to operate and can be used in several Vakuum Pumpe applications across various industries. A liquid band pump works with a sealant needed in its operation. This liquid could be water, oil or any other solvent which is certainly rotated by an impeller within the casing of the pump.
The typical oil used in a big rotary piston vacuum pump is a mineral oil that has been through a distillation process to 
reduce its vapor pressure. These vacuum pumps possess an ultimate vacuum, occasionally called “blank off” vacuum, of 0.010 Torr (10 microns, 1 x 10-2 Torr or 0.0133 mbar).