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Robuschi stands out as one of the main suppliers of vacuum solutions. Thanks to its liquid ring vacuum pump series, Robuschi offers a wide vacuum range, capable of achieving up to 33 mbar(a) while handling gas and vapors without lubricant contamination and ensuring nearly isothermal gas compression.

RVS Liquid Ring Pump Types

The Robuschi liquid ring pump portfolio includes two main configurations of the RVS series:

  • RVS Monoblock – a compact, space-saving solution where the pump and motor share a single shaft, optimizing alignment and simplifying installation.
  • RVS Lantern – a design using a lantern bracket between pump and motor, allowing flexible motor selection, easier maintenance, and enhanced robustness in demanding applications.

Both versions ensure high reliability, low water consumption, minimal vibrations, and easy servicing.

The main characteristics of the range include: 

  • Capacities up to 4,200 m³/h

  • Vacuum up to 33 mbar (a)

  • Robustness and reliability

  • Simple maintenance

  • Low water consumption

  • Minimal noise emission and vibrations

  • ATEX version available according to process requirements

Pressure - Vacuum

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RVS Monoblock Series | Robuschi

Liquid Ring Vacuum Pumps – Monoblock

Vacuum up to 33 mbar(a)

Capacity up to 600 m³/h

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Liquid Ring Pump and Compressor Systems

L-VS Open Circuit and L-SVG Closed Circuit

Vacuum up to 33 mbar(a)

Pressure up to 2,000 mbar(g)

Capacity up to 4,200 m3/h

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RVS - Vacuum Pumps | Robuschi

Liquid Ring Vacuum Pumps

Vacuum up to 33 mbar(a)

Pressure up to 2,000 mbar(g)

Capacity from 400 to 4.200 m³/h

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LRVS-CRVS Liquid Ring Vacuum Pump Packages | Robuschi

Liquid Ring Vacuum Pump Packages (CRVS - LRVS series )

Vacuum up to 33 mbar(a)

Pressure up to 2,000 mbar(g)

Capacity up to 4,200 m³/h

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KVRS - Liquid Ring Vacuum Units | Robuschi

Liquid Ring Vacuum Units

Vacuum up to 33 mbar(a)

Pressure up to 2,000 mbar(g)

Capacity up to 4,200 m³/h

Liquid Ring Pumps and Compressor Systems

Robuschi's liquid ring vacuum pumps stand out for their robust construction features and proven operating principle. Furthermore, they ensure negligible water consumption, low noise levels, reduced vibrations, and minimal maintenance.

The range includes:

  • CRVS vacuum pumps, compact systems, coupled with the electric motor with elastic joint transmission. The CRVS base has been specifically designed to ensure high rigidity and low vibrations.
  • LRVS systems which are equipped with belt and pulley transmission, a patented oscillating motor suspension device, which helps to reduce the load on the pump and motor bearings, maintaining constant belt tension over time. The belt coupling allows for the selection of the vacuum pump at the optimal speed, thereby ensuring the correct flow rate needed for the system, without any waste of energy.
  • KRVS units that are equipped with a separation tank for the partial recirculation of the service liquid and the related connection pipes (/P). In the total recirculation version (/T), the unitsare equipped with a heat exchanger.The separator tank also functions as a muffler for the pump's exhaust noise. The partial recirculation units (/P) are designed to recover a good portion of the operating liquid used to feed the pump. The complete KRVS units with total recirculation (/T) are especially suitable in the case of contaminated gases and/or liquids, with consequent disposal problems.
  • L‑SVT / L‑SVG Systems – systems equipped with monoblock pump versions, offering compactness and efficiency.

In these cases, it is necessary to feed the pump in a closed circuit and cool the liquid through the heat exchanger. This prevents contact between the cooling fluid and the liquid itself. The complete units with Robuschi vacuum pumps are the optimal solution in numerous industrial processes, even in critical applications, such as the discharge of wet gases or vapors. They also ensure negligible water consumption, low noise levels, reduced vibrations, and minimal maintenance.

Whether using monoblock or lantern pumps, or complete systems such as CRVS, LRVS, KVRS, or L‑SVT/L‑SVG, Robuschi offers high‑efficiency, low‑maintenance, and environmentally conscious vacuum solutions for numerous industrial processes.

Operating Principle of Vacuum Pumps

The RVS series vacuum pump is a single-stage liquid ring pump with an automatic discharge valve. The pump consists of a cylindrical element with an impeller that rotates eccentrically. The impeller moves the service liquid (generally water), which, due to centrifugal force, forms a ring, concentric to the cylindrical element. The gas is sucked in through the intake at the front and is then compressed and discharged through the pump's outlet port.

Liquid ring vacuum pumps must be supplied with clean operating liquid free of suspended solid parts to function properly. Appropriate replenishment with fresh liquid ensures the continuity of operation and performance.

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Application Sectors for Vacuum Pumps

The Robuschi range of liquid ring vacuum pumps includes the pump (RVS) available as a bare shaft or coupled as a complete group (CRVS, CRVS, LRV). The variety of solutions allows us to meet the different needs of numerous application sectors.

They can be installed in the food and beverage industry for processes such as degassing, oil refining, in concentration systems, and impurity removal. In the chemical and pharmaceutical sector, Robuschi vacuum pumps and groups are found in processes of distillation, degassing, drying, and solvent recovery. In the plastics industry, liquid ring vacuum pumps are installed in degassing processes.

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Food and Beverage

Dairy processing, food packaging, filling and closing machines, evacuation, food preservation, evisceration, pneumatic conveying, concentration systems, degassing, evaporation, drying, removal of impurities, milking systems, fermentation, process fluids handling.
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Environmental

Desalinisation, biogas production, biogas recovery, slurry drying process, landfill gas recovery, soil gas extraction, suction vehicles for wastewater, mechanical vapor compression and recompression, truck-hydroexcavation.

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General Manufacturing Industry Applications

Central vacuum systems, pick & place, pneumatic conveying, lifting system, air knives, fluid transfer, industrial cleaning, metalization, painting, vacuum in glass forming, air lifting, jet dryer, feeding inert gas, gas handling, air Carpet, holding and lifting, preservation, wood drying

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Medical Industry Applications

Central vacuum systems, steam sterilization

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Mining Industry Applications| Robuschi

Methane gas extraction, ventilation

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Pulp and Paper

Clean liquid handling, pulp handling, pulp drying, tissue

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Plastics

Cooling and drying, extruder degassing, rubber degassing, dryers, granulate conveying, forming

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Power Generation and Oil & Gas

Flue gas desulphurisation, bed combustion fluidization, condenser evacuation, sand oil fields recovery, recovery of cleaning liquids

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Chemical and Pharmaceutical Industry Applications

Coating, cooling, distillation, degassing, drying, gas compression, impregnation, pneumatic conveying, solvent recovery, thin layer evaporation, clean liquid handling, process liquid handling

FAQs

Liquid ring pumps are better for wet processes and tolerate vapor and liquid carryover. Rotary vane pumps are more efficient in dry applications and offer tighter vacuum control.