The Basic Knowledge About Vacuum Filtration

Filtration is the process in which solid particles in a liquid or gaseous fluid are removed by permitting the fluid to go through and retain the solid particles with a filter medium. According to the different nature of the driving force, there are gravity filters, pressure filters, and vacuum filters.

The principle of vacuum filtration is forming the negative pressure to drive the filtration at the outlet of the filtrate. This kind of filtration according to the forms of operation is divided into two types: batch operation and continuous operation. Vacuum filtration with batch operation can filter suspensions of various concentrations. And the one with continuous operation always uses to filter the thick suspensions with many solid particles.

A simple filtration is a container that is separated into the upper chamber and the lower chamber by filter media. People put the suspension into the upper chamber. The suspension passes through the medium from the upper to the lower. And the solution in the lower chamber is filtrate. The solid particles that remained on the surface of the filter medium are filtration residues.

The filtration residue becomes more and more when the vacuum filtration is working. This situation causes a larger resistance. People should stop the filtration work when there is filled with filtration residue or the speed of filtration is slow and clean up the residue. What people do is make the filter medium rework or regenerate so as to complete a filtering cycle.

In the applications of collecting particulate from a liquid suspension, vacuum filtration is driven by negative pressure applied downstream of the filter holder in the lab. The retentate on the filter’s surface or the fluid filtrate is available for more analysis.

Vacuum filtration is widely applied in the laboratory for various analyses such as microorganism tests in food, pharmacy, beverage, and drinking water industries and suspended solid tests in the water treatment field, solvent (mobile phase)refinement before HPLC, GC, and AA analysis, etc.

Our collection of vacuum filtration equipment, such as Anti-Corrosion Diaphragm Vacuum Pump, Glass Triple-Branches Lab Vacuum Filtration System, 500ml Glass Solvent Filtration Apparatus, and Stainless Steel Triple-Branches Vacuum Filtration Unit, provides high-quality components for all of your lab’s vacuum filtration processes.

Stainless Steel Three-Branches Vacuum Filtrations
Three-Branches Vacuum Filtrations
Hawach 300ml Glass Solvent Filters