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