Rotary Vane Vacuum Pump

Get Achieve optimal vacuum generation using rotary vane pumps for both lab and industrial applications


A rotary vane vacuum pump uses rotating vanes to create and maintain essential vacuum conditions, forming the foundation of advanced vacuum technology, and driving scientific, research, and industrial advances. Welch's wide range includes both low and high-capacity models each designed for specific vacuum requirements, with pump speed ranges from 2 to 64 CFM (3.4 to 108.7 m³h) and vacuum pressures up to 0.0003 Torr. Witness precision and innovation harmonize across industries, refining outcomes in laboratories, manufacturing, and beyond. 

What is a Rotary Vane Vacuum Pump? What is the Purpose of Rotary Vane?

A Rotary Vane Vacuum Pump is a versatile and essential tool used to create a vacuum by removing gas molecules from a sealed chamber. It operates based on a rotary vane mechanism, which consists of a set of vanes that rotate within the pump's chamber. As the vanes rotate, they compress gas and push it towards the exhaust, effectively creating a partial vacuum.
The purpose of a Rotary Vane Vacuum Pump is to provide a reliable means of generating vacuums in various settings. These pumps find extensive use in scientific laboratories, research facilities, and industrial processes. They are particularly beneficial for applications that require a stable and consistent vacuum environment, such as in manufacturing processes, vacuum packaging, and analytical instrumentation.
With their ability to achieve high levels of vacuum, Rotary Vane Vacuum Pumps contribute significantly to improving the efficiency and accuracy of processes across different industries. Their adaptability and reliability make them indispensable tools for creating and maintaining vacuum conditions in a wide range of applications.


 Where are Rotary Vane Vacuum Pumps Required? 

Rotary vane vacuum pumps are valuable tools used in various industries, providing reliable vacuum capabilities for a wide array of applications. Here are some key industries where these pumps find extensive use: 

  • Laboratories and Research Institutions: Rotary vane pumps power analytical instruments, such as mass spectrometers and electron microscopes, enabling precise experiments and research in biology, chemistry, and material sciences. 

  • Pharmaceuticals and Biotechnology: Vacuum pumps play a critical role in pharmaceutical freeze-drying processes, helping preserve delicate substances and produce stable medications. Additionally, they facilitate biotechnology applications like DNA sequencing and protein purification. 

  • Electronics Manufacturing: Rotary vane vacuum pumps are utilized in semiconductor manufacturing to create a clean and controlled environment for the deposition and etching processes essential for chip production. 

  • Metallurgy and Heat Treatment: In metallurgical applications, rotary vane pumps assist in creating vacuum conditions necessary for heat treatment processes, such as annealing and tempering, to enhance the material properties of metals. 

  • Chemical Processing and Petrochemicals: Rotary vane vacuum pumps help in chemical distillation, filtration, and solvent recovery processes. They also handle corrosive vapors in petrochemical refineries and ensure a safe and efficient working environment. 

  • Food and Beverage Processing: Vacuum pumps are utilized to remove air from packaging containers, ensuring the preservation of food products and extending their shelf life. 

  • Aerospace and Aviation: Rotary vane vacuum pumps are employed in space simulation chambers, enabling researchers to recreate vacuum conditions similar to space environments for testing spacecraft components and materials. 

  • Environmental Monitoring and Analysis: These pumps support environmental studies, enabling the analysis of air samples and monitoring of pollutants in atmospheric research and climate studies. 

  • Automotive and Engine Testing: Rotary vane vacuum pumps play a vital role in automotive emission testing and engine development processes, helping to measure and control pollutant levels. 


Where are the Advantages of Rotary Vane Vacuum Pumps? 

WELCH Vacuum takes pride in offering rotary vane pumps that stand out in terms of performance, reliability, and versatility. Our rotary vane vacuum pumps come with an array of distinct advantages that make them the preferred choice for a wide range of applications: 

  • Reliable Performance and Low Maintenance: Our rotary vane pumps are engineered to deliver consistent and reliable vacuum performance. With sturdy construction and smooth operation, they require minimal maintenance, ensuring continuous and trouble-free operation. 

  • Comprehensive Range of Accessories: WELCH provides a comprehensive range of accessories, allowing you to customize your rotary vane pump to suit specific applications. These accessories enhance the pump's versatility, making it adaptable to various vacuum processes. 

  • Tailored Pump Packages for Selected Applications: We offer specialized pump packages designed for specific applications, streamlining your vacuum processes. These packages come equipped with professional accessories, optimizing the pump's performance for the targeted application. 

  • Flexible Motor Options: Our rotary vane pumps are available with one-phase or three-phase motors, allowing you to choose the most suitable power supply for your operational requirements. 

  • Option for PFPE Oil Operation: Selected models of our rotary vane pumps are designed for operation with PFPE (perfluoropolyether) oil. PFPE oil is known for its exceptional chemical resistance, making it ideal for applications involving harsh and corrosive substances. 



How Does a Rotary Vacuum Pump Work? 

The ingenious operation of a rotary vane vacuum pump lies in its simplicity, yet it delivers highly effective vacuum generation. At WELCH Vacuum, our rotary vane pumps are engineered with precision to ensure optimal performance. Here's how they work: 

  1. Vane Rotation: The pump's main component is a set of vanes, typically made of graphite or carbon, housed within the pump chamber. These vanes are free to move and are mounted on a rotor. 

  1. Gas Capture and Compression: As the pump is powered on, the rotor starts to spin, causing the vanes to move outwards due to centrifugal force. As the vanes extend outward, they trap the gas molecules present in the chamber. 

  1. Gas Discharge: The rotating vanes then carry the trapped gas molecules towards the exhaust or discharge port. As they reach the exhaust, the vanes compress the gas, significantly increasing its pressure. 

  1. Vacuum Generation: The compressed gas is expelled from the pump through the exhaust, creating a region of lower pressure in the pump chamber. This process leads to the creation of a vacuum, as the pressure inside the chamber decreases below atmospheric pressure. 

  1. Continuous Cycle: The vanes continue to rotate, capturing and compressing gas molecules, while the expelled gas maintains the vacuum environment inside the chamber. 


What is the Pumping Speed of a Rotary Vane Vacuum Pump? 

The pumping speed of a rotary vane vacuum pump is a critical parameter that determines its ability to remove gas molecules from a sealed chamber and establish the desired vacuum level. At WELCH Vacuum, we offer a diverse range of rotary vane pumps, each with varying pumping speeds tailored to specific applications:

Low Capacity (CRVpro 2, 4, 6, 8, 16, 24, and 30 models):

  • Pumping Speed Range: From 2 to 22 CFM (3.4 to 37.4 m³h).

  • Catering to the needs of laboratories, analytical instrument users, and industrial applications, these pumps guarantee consistent and reliable vacuum performance, whether you are engaged in complex scientific experiments or overseeing industrial processes. 

High Capacity (CRVpro 48 and 65 models):

  • Pumping Speed Range: From 46 to 64 CFM (78.1 to 108.7 m³h).

  • For applications that require more demanding performance, our high-capacity models feature pumps designed to excel in industrial processes that demand robust and efficient vacuum generation, offering high-capacity solutions. 


What is the Vacuum Range of a Rotary Vane Pump? 

The vacuum range of a rotary vane pump is determined by several factors, including the pump's design, specifications, and intended application. At WELCH Vacuum, we offer a range of rotary vane pumps, each with its distinct vacuum capabilities to address various requirements. Let's explore some examples of our pumps and their respective vacuum ranges:

  • CRVpro 2, 4, 6, and 8: Vacuum Range up to 0.00015 Torr
  • CRVpro 16, 24, 30, 48, and 65: Vacuum Range up to 0.0003 Torr