Laboratory Vacuum Pump

High-performance vacuum pumps and systems for laboratory and industrial applications


A laboratory vacuum pump is an essential tool that creates and maintains vacuum conditions, playing a crucial role in a variety of scientific applications. Welch offers a wide range of high-performance pumps, including rotary vane, belt-driven, diaphragm, scroll piston, and oil-diffusion pumps, as well as fluid aspiration systems and vacuum blower systems. Each pump is designed to meet the specific needs of any laboratory or industrial application, ensuring efficiency and reliability in your research.

What is Laboratory Vacuum?

Laboratory vacuum refers to pressure below atmospheric pressure, with its usefulness determined by two main factors: the depth of vacuum, indicating how far below atmospheric pressure, and the pumping speed, which determines the rate at which air, vapors, or gases can be removed from the evacuated vessel.  

Achieving and maintaining the required vacuum conditions is made possible through laboratory vacuum pumps. 

What is a Lab Vacuum Pump Used For?

A vacuum pump for laboratory use is a critical tool for researchers and scientists across diverse fields. It serves as a versatile workhorse that helps to create and maintain vacuum conditions essential for various applications.  

Whether you need to remove air and moisture from a reaction vessel, concentrate samples, or assist in filtration, Welch lab vacuum pumps are designed to meet your specific needs. From basic tasks to complex processes, our pumps play an imporant role in advancing scientific discoveries. 

Why do you Need a Laboratory Vacuum Pump?

Using a laboratory vacuum pump is a highly recommended practice for scientists and researchers due to its numerous benefits and critical role in laboratory work. Here are the key reasons why using a vacuum pump in your scientific processes is essential: 

  1. Efficient Removal of Gases and Contaminants: It excels at quickly and effectively removing unwanted gases and contaminants from a sealed environment, ensuring experiment purity and integrity. 

  1. Facilitation of Precise Reactions and Processes: It creates controlled, oxygen-free environments, enabling precise control over reactions and accurate results in sensitive applications. 

  1. Acceleration of Evaporation and Drying: It significantly speeds up solvent and liquid removal, saving valuable time in processes like rotary evaporation and freeze-drying. 

  1. Protection of Delicate Samples: It shields sensitive materials from air exposure, preserving their properties and integrity. 

  1. Enhanced Filtration and Separation: It expedites filtration tasks and minimizes the risk of clogging or cross-contamination during separation processes. 

  1. Reproducible Results: By maintaining a stable vacuum environment, it ensures consistent outcomes vital for rigorous research. 

  1. Noise Reduction and Improved Safety: Welch Vacuum's innovative technologies, such WOB-L®, offer quiet and reliable operation, enhancing the lab's work environment and ensuring safety. 

  1. Versatility Across Multiple Applications: From chemistry and biology to material science, it finds applications across diverse scientific fields, showcasing their adaptability. 

  1. Increased Productivity and Workflow Efficiency: Streamlining tasks enables researchers to focus on core work, ultimately increasing productivity. 

  1. Accelerated Scientific Discoveries: It becomes an invaluable tool for groundbreaking advancements and exploring new frontiers in research. 

How to Choose the Right Laboratory Vacuum Pump?

When deciding on a laboratory vacuum pump that is suitable for your application, consider the following factors: 

  • Max Vacuum and Max Flow Rate: Check the maximum suction capacity and pumping speed to suit your specific requirements. 

  • Lubrication Type: It is important as it determines whether the pump requires oil for operation or uses dry lubricant, which can impact the pump's noise level, maintenance needs, and suitability for specific applications. 

  • Motor Horsepower: Select the appropriate horsepower to match your application's required suction power. 

  • Noise Level: Consider the noise produced by the pump, especially if it will be used in a shared space. 

  • Weight: Opt for a lighter model portable measurements. 

  • Hose Barb Inlet and Outlet Size: Ensure they match your needs. 

Laboratory Vacuum System Applications

The applications of our lab vacuum systems and pumps are vast and varied. Some common areas where our pumps excel include:

  • Chemistry and Research Labs: Supporting chemical processes, rotary evaporation, and vacuum ovens.
  • Analytical Labs: Assisting in gas chromatography, mass spectrometry, and sample concentration.
  • Life Sciences: Facilitating filtration, freeze-drying, and DNA/RNA purification.
  • Material Science: Crucial for thin film deposition, surface analysis, and sputtering processes.
  • Education and Teaching Labs: Empowering students and educators with reliable vacuum technology for practical demonstrations.

Can Lab Vacuum Pumps Be Used in Industrial Applications?

Yes, laboratory vacuum pumps can be used in certain industrial applications as well. While they are primarily designed for laboratory settings, their compact size, efficient performance, and versatility make them suitable for specific industrial processes.  

For example, laboratory vacuum pumps can be utilized in industries such as pharmaceuticals, food processing, packaging, and electronics manufacturing, where precise vacuum control, removal of gases or contaminants, and efficient filtration are required. However, it is important to ensure that the specific requirements and demands of the industrial application align with the capabilities and specifications of the laboratory vacuum pump being considered for use. In cases where industrial-scale or heavy-duty vacuum requirements are involved, dedicated industrial vacuum systems may be more appropriate. 

What Type of Lab Vacuum Pump is Most Efficient?

The efficiency of a vacuum pump depends on your specific application's demands. Welch Vacuum offers various types, each excelling in different scenarios: 

  • Rotary Vane Pumps: Efficient for general laboratory use, with vacuum levels suitable for tasks like rotary evaporation, freeze-drying, and vacuum ovens.  

  • Belt Drive Pumps: Efficient for general laboratory use with vacuum levels suitable for Schlenk Lines, rotary evaporation, and freeze drying.
  • Diaphragm Vacuum Pumps: Efficient for analytical labs and life sciences, achieving vacuum levels ideal for contamination-free pumping.  

  • Fluid Aspiration Systems: Efficient for precise fluid handling for efficient pipetting and dispersal.  
  • Piston Pumps: Efficient for consistent vacuum levels in research and education settings, with vacuum ranges suited for various tasks.  

  • Scroll Pumps: Efficient for dry air applications, freeze dryers, backing turbos, and diffusion pumps, as well as glove boxes.
  • Vacuum Blower System: Efficient for demanding industrial and research vacuum processes, providing strong suction capabilities. 

  • Oil Diffusion Pump: Unparalleled efficiency for maintaining ultra-clean, high-purity vacuum environments in advanced research.

 Selecting the most efficient vacuum pump involves considering factors like required vacuum levels, noise, and application type. Welch Vacuum's range of efficient solutions is designed to optimize performance and productivity in your laboratory or industrial setup. 

What is the Pressure of a Lab Vacuum Pump?

In laboratories, the range of vacuum levels used can vary significantly based on the specific application and requirements. Generally, laboratory vacuum pumps can achieve vacuum levels ranging from atmospheric pressure (0 mbar) to as low as 0.001 mbar (1 micron) or even lower in certain specialized ultra-high vacuum (UHV) applications. 


Linking it to the products mentioned earlier: 

  • Rotary Vane Pumps: Rotary vane pumps are capable of achieving vacuum levels suitable for a wide range of general laboratory applications, typically in the range of 1 to 10 mbar. 

  • Belt Drive Pumps: Belt driven pumps are capable of achieving vacuum levels suitable for a wide range of general laboratory applications, typically in the range of 0.0001 to 0.095 torr. Diaphragm vacuum pumps are ideal for achieving vacuum levels in the range of 0.1 to 10 mbar. 
  • Diaphragm Vacuum Pumps: Diaphragm vacuum pumps are ideal for achieving vacuum levels in the range of 1.5 to 150 torr.
  • Piston Pumps: WOB-L piston pumps can achieve vacuum levels in the range of 0.1 to 1 mbar. 

  • Scroll Pumps: Scroll pumps are capable of achieving vacuum levels suitable for a wide range of general laboratory applications, typically in the range of 0.01 to 0.12 torr.
  • Vacuum Blower System: Vacuum blower systems are capable of providing vacuum levels in the range of 0.04 to 0.095 torr.
  • Oil Diffusion Pumps: These systems can achieve extremely low vacuum levels, going as low as 10-5  torr .    

How Does a Lab Vacuum Pump Work?

At its core, a vacuum pump for lab applications operates by removing gas molecules from a sealed volume, creating a partial vacuum. This process allows the pump to pull substances into the vacuum, simplifying different lab operations. Our pumps utilize cutting-edge technology, such as rotary vane and diaphragm mechanisms, to ensure efficient and reliable performance. The result is a seamless workflow, with excellent suction capabilities and minimal noise, maximizing productivity and convenience for your research.