A liquid band 
vacuum pump is simple to operate and can be used in a number of applications across various industries. A liquid ring pump works together with a sealant needed in its operation. This liquid could be water, essential oil or any other solvent which can be rotated by an impeller within the casing of the pump.
The typical oil found in a large rotary piston vacuum pump is a mineral oil that has been through a distillation Vakuum Pumpe process to lessen 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).