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