Atlas Copco LRP VSD+ series
The Atlas Copco LRP VSD⁺ series comprises intelligent liquid ring vacuum pumps with variable speed control for demanding applications with high vapour and moisture loads. The compact, energy-efficient design combines high performance, low operating costs and low maintenance requirements.
- 3Models
- 740–1,050m³/h pumping speed at 50 Hz
- 25mbar ultimate pressure
- 18.5–37kW rated motor power at 50 Hz

Product overview
Products of the Atlas Copco LRP VSD+ series
Each row leads to the model with its technical data and variants.
LRP 700 VSD+Pumping speed 740 m³/h 50 Hz740 m³/h 60 HzUltimate pressure 25 mbarRated motor power 18.5 kW 50 Hz18.5 kW 60 HzVariants 10
LRP 900 VSD+Pumping speed 940 m³/h 50 Hz940 m³/h 60 HzUltimate pressure 25 mbarRated motor power 26 kW 50 Hz26 kW 60 HzVariants 10
LRP 1000 VSD+Pumping speed 1,050 m³/h 50 Hz1,050 m³/h 60 HzUltimate pressure 25 mbarRated motor power 37 kW 50 Hz37 kW 60 HzVariants 10About the series
Features and benefits of the LRP VSD+ series
The series at a glance
The LRP 700–1000 VSD⁺ range has two variable drives for precise vacuum control and optimisation of the water circulation. Stainless steel components such as the impeller, end plates, liquid tank and heat exchanger provide high corrosion resistance and a long service life, even with aggressive process gases and contaminants.
The integrated Automatic Seizure Prevention protects the pump element against seizing after longer standstill periods. Thanks to the Elektronikon® controller and Atlas Copco ES central controllers, monitoring and remote control are possible.
Typical applications are food processing, plastics extrusion, rubber processing, pulp and paper, mining, drying, sterilisation and evaporation.
With the LRP VSD+ series, Atlas Copco offers a powerful range of liquid-sealed liquid ring vacuum pumps that was developed for reliable operation, high efficiency and demanding process conditions. The proven liquid ring principle allows the reliable conveying of moist, contaminated and condensable gases. Thanks to the integrated VSD+ drive, the pump speed adjusts automatically to the actual vacuum demand, which offers an energy-efficient solution for industrial vacuum applications.
Energy-efficient operation
The integrated VSD+ drive adjusts the pump speed automatically to the actual vacuum demand. This can reduce energy consumption, particularly when the load varies.
Robust and reliable
The proven liquid ring principle allows reliable operation even with moist or liquid-laden gas flows. The robust construction is designed for demanding industrial applications.
Versatile in use
The LRP VSD+ is particularly suitable for processes with moist, contaminated or condensable gases. It offers a reliable solution for numerous industrial vacuum applications, for example in food processing, packaging, the chemical industry and the general process industry.
Operating principle
The Atlas Copco LRP VSD+ series works on the principle of liquid-sealed liquid ring vacuum technology. An eccentrically arranged impeller rotates inside the pump housing and forms a liquid ring with the aid of an operating liquid. This creates the necessary working chambers, in which the gas drawn in is continuously taken in, compressed and then discharged. The operating liquid provides both the sealing and the cooling of the compression chamber. This makes the LRP VSD+ particularly suitable for applications in which moist, contaminated or liquid-laden gases have to be conveyed. The robust construction and the proven liquid ring principle allow reliable and low-maintenance operation. The integrated VSD+ drive adjusts the speed automatically to the actual vacuum demand and can thereby reduce energy consumption under changing operating conditions. The LRP VSD+ series is suitable for numerous industrial applications that call for reliable vacuum generation, efficient operation and the conveying of moist or contaminated gases.
The technology page shows the operating principle with an interactive drawing: Liquid ring vacuum pumps.
Standard operating conditions and performance
- Ambient temperature: 0 to 40 °C, depending on model and version
- Designed for water-sealed or liquid-sealed vacuum applications
Frequently asked questions
Questions about the Atlas Copco LRP VSD+ series
Which models does the Atlas Copco LRP VSD+ series comprise?
Which pumping speeds does the series cover?
What ultimate pressure do the models of the series reach?
How does the technology of the series work?
Does Ehrler & Beck supply spare parts and service for the Atlas Copco LRP VSD+ series?
Which model fits your process?
Tell us the gas to be conveyed, the working pressure and the flow rate you need – we will advise you on selection, spare parts and service.







