Liquid ring vacuum pumps remain a safe and reliable workhorse, underpinning countless processes across industry – from chemical plants and pharmaceutical labs to food processing facilities and materials-handling.

CDR Pumps (UK) Ltd is proud to partner with Italian manufacturer Pompetravaini to provide the UK market with high-performance liquid ring vacuum pumps and recirculation systems.

Why Travaini Liquid Ring Vacuum Pumps Are Trusted

Liquid ring vacuum pumps are prized for their simplicity, reliability, and versatility. Their off-centre impeller uses a ‘liquid ring’ to compress and convey gases or vapours, producing near-isothermal operation and minimal wear. With only one moving part in the fluid cavity, maintenance is straightforward, uptime is high, and processes – from distillation and drying to filtration, plastic extrusion, and even live fish transfer – run smoothly.

Their adaptability extends to temperature management, fluid choice, and material construction. Capable of creating vacuums down to 33 mBar while handling high volumes of vapours, condensable gases and liquids with ease, they are a trusted solution across a wide range of applications.

The Benefits of Travaini Vacuum Pumps

• Durability:  Only one moving part (the rotor) – ensures long life and minimal maintenance. The absence of metal-to-metal contact within the pump cavity eliminates the need for internal lubrication and reduces wear.
• Versatility: They can handle wet or saturated gases and small liquid carryover
• Safety: They can handle explosive and corrosive gases without contamination 
• Temperature Stability: Near-constant operating temperature protects sensitive materials
• Customisable: Pump fluid and materials can be tailored for corrosive or hazardous gases

A Sustainable Choice: Reducing Energy, Water and Effluent Costs

Historically, liquid ring vacuum pumps relied on service water that often went straight to drain – cheap and convenient at the time. Today, rising water and effluent treatment costs make this approach expensive. With industry facing growing pressure to reduce utility use and environmental impact, vacuum pumps are proving highly effective in cutting energy, water and effluent discharge costs.

By reducing water consumption, vacuum pumps lower energy demands for pumping and treatment, improving overall process efficiency.

Recirculation Systems: Partial and Full

CDR Pumps’ partnership with Pompetravaini extends to supplying partial and full recirculation ‘plug and play’ vacuum systems.

Recirculation vacuum systems build on the proven performance of vacuum pumps, further minimising energy use, water consumption, and effluent output. By recycling operating fluids, they help companies meet both operational and sustainability goals.

• Partial recirculation reduces water use by 25–30%
• Full recirculation can cut water consumption by up to 80% without compromising vacuum performance

These systems can retrofit existing pumps and be supplied as fully ATEX-compliant units for explosive atmospheres. 

Why Recirculation Makes Liquid Ring Vacuum Pumps Stand Out

Recirculation systems unlock the full potential of liquid ring vacuum technology. By carefully controlling the operating fluid, these systems allow pumps to perform reliably under demanding conditions, handling vapour-laden gases, minor liquid carryover, and aggressive chemicals without compromising uptime. Engineers gain the flexibility to adapt pumps to diverse processes, whether retrofitting existing systems or designing new installations, while ensuring compliance with ATEX and other safety standards.

In short, recirculation doesn’t just save water – it enhances the robustness, flexibility, and predictability of vacuum operations, making liquid ring pumps a versatile, future-ready solution for complex industrial challenges.

The Bottom Line

For engineering professionals evaluating vacuum solutions, the case is clear: adopting liquid ring vacuum pumps with recirculation is a low-risk, high-reward strategy.

They offer:

• Proven reliability across multiple industries
• Significant reductions in water and effluent costs
• Compliance with ATEX and other safety standards
• Flexibility to retrofit or install new systems

As resource efficiency becomes ever more critical, this technology is a smart investment. And with continued research and development improving efficiency and versatility, these pumps are poised to play an increasingly vital role in modern chemical processing.

To discuss a vacuum pumping solution for your application, contact the specialist team at CDR Pumps: 01933 674777, sales@cdrpumps.co.uk