Industrial Two-Stage Rotary Vane Vacuum Pump

Proper maintenance is essential to keep our TwoStage Rotary Vane Pumps performing at their best. For a quick and safe oilchange procedure, simply follow our stepbystep video demonstration and the detailed instructions provided in our Oil Change Guide for Rotary Vane Pumps.

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.

Want to understand  how rotary vane vacuum pumps work?

Read our Knowledge Base article on the operating principle of rotary vane pump technology. It covers the main components and the stages of vacuum generation.

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.

• Freeze Drying (Lyophilization) A common method used to remove water from foods, pharmaceuticals, and other products before storage or transport is lyophilization, also known as freeze drying. A key part of this process is a reliable vacuum source, and two stage vacuum pumps are the most dependable option for achieving the deep and stable vacuum required.
• Vacuum Ovens Rotary vane pumps provide the stable, low-pressure environment required for controlled drying, degassing, and curing. Their strong vapor-handling capability helps protect heatsensitive materials and ensures uniform processing inside vacuum ovens.
• Mass Spectrometry Used as backing pumps, rotary vane vacuum pumps provide clean and consistent vacuum levels for accurate MS analysis. Welch’s CRVpro pumps run at lower operating temperatures to reduce oil breakdown, while their large oil reservoir dilutes chemical contaminants.
• Botanical Extraction Vacuum Pumps in THC/CBD Extraction Workflows They support solvent recovery and controlled evaporation, helping improve purity and overall process efficiency. 
• HVAC & Refrigeration Systems Two stage pumps evacuate air and moisture from HVAC refrigerant lines to ensure proper system charging and long term reliability. This evacuation step is essential during installation and maintenance. Welch’s CRVpro pumps deliver high flow in a lightweight, compact design, making them ideal for service work on rooftop HVAC units and RTUs. 

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. If you ever need guidance on how to replace the filter element, our article walks you through the complete 7 easy steps.

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.If you need help with force flushing the oil, our artilcle covers exactly how does oil flushing work.

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.

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