Vacuum Pumps for Centrifugal Vacuum Concentrators

Selecting the Optimal Centrifugal Vacuum Pump for Vacuum Concentrator Applications

What Are Vacuum Concentrators?

Vacuum concentrators are specialized tools used in laboratories. They use spinning motion to concentrate or evaporate multiple samples at once under vacuum conditions. These devices are important in laboratories because they help remove volatile substances from samples. This process allows researchers to get concentrated solutions or residues for accurate analyses.

Vacuum concentrators, also known as vacuum centrifuges, are vital in techniques like chromatography, mass spectrometry, and spectroscopy. These techniques require precise measurements. These devices also help speed up and make sample preparation more reliable. This saves time and resources in laboratory work, especially in fields such as chemistry, biochemistry, and pharmaceutical research.


How Does a Vacuum Concentrator Work?

A centrifugal concentrator works by spinning liquid samples at high speeds. This spinning creates a force that pushes the samples’ liquids to the container walls, making the liquid surface area larger. At the same time, a vacuum pump reduces the air pressure inside the concentrator. This low pressure makes the liquids evaporate faster by lowering their boiling points.

The combination of spinning and reduced pressure makes the liquids evaporate quickly, leaving concentrated solutions or residues behind. The evaporated liquids are collected in a separate part of the concentrator, a process called cold trapping. This prevents damage to the vacuum pump and keeps the air quality safe.


Selecting the Right Centrifugal Vacuum Pump

Vacuum pumps are crucial in vacuum concentrator systems, serving as the backbone of the entire process. They create and maintain the necessary vacuum level within the concentrator chamber. The choice of the right vacuum pump enables rapid concentration and enhances the efficiency of solvent removal.

A centrifugal vacuum pump plays a key role in swiftly and effectively removing solvents from samples. This leads to quicker concentration and higher sample throughput in laboratory workflows. When choosing a vacuum pump for a specific concentrator application, it’s important to consider several factors to ensure optimal performance.

The pump needs to work well with the solvents and chemicals used to avoid any chemical reactions or damage to its parts. How fast air and vapors are removed from the concentrator chamber, which directly affects how quickly the concentration process happens, depends on the pump’s flow rate.

The vacuum pressure level of the pump is also crucial. It must be controlled precisely to match the needs of the samples and the concentration process. If the vacuum pressure is too high or too low, it can affect the quality of the results and the integrity of the samples.


Why Choose Welch Vacuum Concentrator Solutions?

Welch provides a variety of centrifugal vacuum concentrator solutions, such as the 2044 DryFast®, 2042 DryFast® Ultra, and MPC 201 T diaphragm pumps, along with modular laboratory vacuum systems (LVS). These options are highly suitable for lab applications because of their specific features geared towards efficiency and precision:

  • Oil-free operation: Ensures the safety of sensitive biological and organic samples by preventing contamination from oil vapors.
  • Chemical resistance: Welch pumps are equipped with PTFE heads and special valves to handle aggressive chemicals like TFA, HCL, formic acid, and acetic acid without damage.
  • Optimal vacuum performance: These pumps maintain a consistent and reliable vacuum environment. For instance, the Model 2044 achieves an ultimate vacuum pressure of 9 Torr (12 mbar), and the Model 2042 reaches 2 Torr (2.7 mbar), which is essential for efficient sample drying and concentration.
  • Adequate flow rate: With a flow rate of 35 l/min @ 60Hz, these pumps ensure quick sample processing.
  • Low maintenance: They require minimal upkeep, reducing the need for frequent repairs and messy oil changes associated with traditional pumps.


Welch Model Selector for Vacuum Concentrators

Use our model selector to find an ideal centrifugal vacuum pump solution that will best match your unique vacuum concentrator application needs.




Case Study

Interested in understanding the advantages of using Welch vacuum pumps for vacuum concentrator applications? You can download our case study to learn how Welch solutions quickly assisted a prominent vacuum concentrator manufacturer in facilitating solvent evaporation from various concentrated composites, including DNA/RNA, nucleoside, protein, drug, metabolite, and enzyme samples.

Do You Need a Customized Solution?


Welch has extensive experience in designing and engineering customized vacuum pump solutions tailored to customers’ specific application needs. Contact us today and let us provide you with a solution that will ensure optimal performance of your centrifugal vacuum concentrator.