In pharmaceutical production, it involves a variety of vacuum separation processes such as vacuum separation rough pumping, low vacuum recovery of organic solvents, high vacuum distillation of high boiling point thermal sensitive materials, vacuum filtration of solid impurities removal, vacuum drying of powder intermediates or products, and so on, and in all of these processes, the vacuum collection equipment is indispensable, and the majority of the rough and low vacuum equipment used are water ring, rotary vane, and slide valve type vacuum pumps.

The water ring vacuum unit removes non-condensate, water and light hydrocarbons from the system and separates the raw material by means of a distillation column. The gases discharged from the top of the distillation column are condensed and the liquid is returned to the distillation column for further separation, typical applications being fatty acids, mono-component glycerol hydrochloric acid, vitamins (A, E), oils, greases, paraffins, pesticides and plasticisers.

Over-saturated liquid are evaporated and cooled to form crystals that are easy to carry, store and sell.Vacuum pumps are ideal for this application, they can be used at all pressures to control the rate of evaporation and cooling and to reduce costs by lowering the boiling point of the liquid.

Drying is a low cost and low temperature procedure.It evaporates liquids from solids by reducing the vacuum, and biological or active ingredients are not destroyed, degraded or oxidised.The drying of medical and biological products involves the removal of solvents, water, etc. and requires a final drying vacuum of less than 1 Torr. After drying, a granular product is left behind, which is then pressed into tablets that are low in humidity and remain there longer.

Vacuum degassing is the removal of dissolved or residual gases from a liquid or product.Vacuum devices can remove gases from liquids to improve physical properties and product quality for further processing and to avoid cross-contamination or corrosion.Examples include degassing to improve purity (hydrocarbon oils, insulating oils, turbine oils, brake fluids and hydraulic brake fluids, etc.), paint stripping to remove excess gases that may harden or deteriorate, and degassing of polymers in an ext-ruder for a higher-quality product or no air bubbles.