Robuschi stands out as one of the main supplier of vacuum solutions. Thanks to its liquid ring vacuum pump series, Robuschi is able to offer a wide vacuum range, capable of achieving up to 33 mbar (a) and of sucking gas and vapors without contamination from lubricants and with nearly isothermal gas compression.

Robuschi has introduced a new series of liquid ring pumps and compressors in a monoblock design, tailored to deliver exceptional performance and efficiency. These new models cover a wide range of applications, providing reliable solutions for industries requiring robust and efficient fluid handling.

The liquid ring vacuum pump series assures reduced water consumption, low noise and vibrations, minimum maintenance. The range includes complete groups (KRVS, CRVS, LRVS), especially developed for the vacuum generation in different sectors. 

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 

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 compact systems with CRVS vacuum pumps, coupled to the electric motor with elastic joint transmission. The CRVS base has been specifically designed to ensure high rigidity and low vibrations.  

The range also includes the 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.  

The range of vacuum pumps also includes the complete KRVS units. They 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 units are 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. 

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. 

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. 

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. 

vacuum-pumps_pompe-per-vuoto-ad-anello-liquido-principio-di-funzionamento
Operating Principle of Vacuum Pumps

Applications

These products are suitable for many different applications, including the following:

  • Food and Beverage

  • Environmental

  • General Manufacturing

  • Medical

  • Mining

  • Pulp - Paper

  • Plastics

  • Power Generation – Oil & Gas

  • Chemical – Pharmaceutical

Vaccum Pumps Application in Various Different Industries