Vacuum Filtration Overview

Vacuum filtration is a chemistry technique that can allow for a greater rate of filtration in the lab. In normal filtration, gravity can provide the force drawing the liquid through the filter paper, but a pressure gradient performs this function in vacuum filtration, offering a variable rate due to the different strengths of the pump extracting the air from the Büchner flask.

The process of vacuum filtration has advantages in comparison to gravity filtration. First, vacuum filtration is often faster than gravity. It takes less than one minute if you set it up with good seals and a good vacuum source. And vacuum filtration is much more efficient at removing residual liquid, in the result of a purer solid. You will find it very important in crystallization, because the liquid may contain soluble impurities, and when the solvent evaporates, the impurities might adsorb back onto the solid surface.

On the other hand, compare with gravity filtration, vacuum filtration also has some disadvantages. The force of the vacuum may draw fine crystals through the filter paper pores, and a quantity of material cannot be recovered from the filter paper. So we suggest that you use vacuum filtration when dealing with large crystals.

Three-Branches Vacuum Filtrations Six-Branches Stainless Steel Vacuum Filtrations Stainless Steel One Branch Vacuum Filtrations

Equipment for Vacuum Filtration Recommendation Reasons

With years of industry experience and technical expertise, Hawach is totally committed to solving all kinds of complex filtration, fluid recovery, and vacuum pump challenges.

Hawach is available in different types of glass vacuum filtration such as one-branches, three-branches, and six-branches vacuum filtrations. Compared with one-branch types, three-branch, and six-branch vacuum filtrations can be used to filter multiple samples at the same time without causing contamination and reducing performance. Meanwhile, stainless still vacuum filtration also has one-branch, three-branch, and six-branch vacuum filtrations. All of them provide quick filtration, acid, and alkali resistance, and can work for a long period without maintenance.

Tips for Selection and Operation

Vacuum filtration produced by Hawach Scientific will be your wise choice with the competitive price, good quality, and best service. Glass vacuum filtration is made of high-quality glass materials which can be used for autoclaving under 180℃ to 280℃ high temperatures, so it fits for chemical analysis, sanitation inspection, and other testing areas. Stainless vacuum filtration is manufactured from 316L stainless steel, and designed with an automatic cooling exhaust system, which can ensure continuous operation without breakdown.