Rotary vane pumps and chemistry-HYBRID pumps

Powerful and compact – these are our rotary vane pumps for a process vacuum of down to 10-3 mbar. The special features: even with the gas ballast open, they achieve a high level of vapor tolerance with very good ultimate vacuum at the same time. You also benefit from extended oil change and maintenance intervals thanks to optimized lubrication circuit and large usable oil volume.


Chemistry-HYBRID pump

Combination of oil-sealed rotary vane pump and chemistry diaphragm pump for improved corrosion resistance. The diaphragm pump permanently evacuates the oil reservoir, freeing it from corrosive gases and vapors.

BestsellerUltimate vacuum / Pumping speed
RC 62 x 10-3 mbar / 5.9 m3/h

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Rotary vane pumps

Compact, oil-sealed rotary vane pumps with large usable oil volumes.

BestsellerUltimate vacuum / Pumping speed
RZ 2.52 x 10-3 mbar / 2.3 m3/h
RZ 62 x 10-3 mbar / 5.7 m3/h
RZ 92 x 10-3 mbar / 8.9 m3/h

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Technical highlights

Powerful and compact

Our rotary vane pumps with comprehensive accessories are widely used in the fine vacuum range (1 - 10-3 mbar). They are optimally designed for use in chemistry and physics, e.g. for freeze drying, distillations with Schlenk Lines or residual drying at the drying oven.

What are the distinguishing features of rotary vane pumps from VACUUBRAND? They are powerful yet compact in design. The effective gas ballast device with large gas ballast volume also provides high vapor tolerance for water and solvents. Even with the gas ballast open, our rotary vane pumps enable a very good ultimate vacuum. They also feature optimized recirculating lubrication and a large usable oil volume. Your advantage: extended oil change and maintenance intervals.

Chemical resistant HYBRID technology

Do you work with aggressive media? Our chemistry HYBRID pump RC 6 effectively protects against corrosion: The unique combination consists of a two-stage rotary vane pump and a chemistry diaphragm pump. The diaphragm pump permanently evacuates the oil reservoir, thus freeing it from corrosive vapors and condensates.

The difference with conventional rotary vane pumps is that condensate can form in the oil-sealed area of the pump. If the oil is attacked or diluted by this, it impairs the functioning of the pump. There is also a risk of metal parts corroding.

The oil-free and chemically resistant alternative

The scew pump VACUU·PURE® reliably delivers the benefits of oil-free vacuum technology down to 10-3 mbar.

We listened to you: you asked for contamination-free vacuum that lets your clean processes run efficiently. Our team of experts developed VACUU·PURE for precisely these applications. Our dry screw pumps meet challenges where other technologies fall short.

For working with aggressive gases and vapors, the chemical-resistant version VACUU·PURE 10C is available.

For work with non-corrosive gases and vapors, there is the specially designed model VACUU·PURE 10.


Measure and control down to 10-3 mbar

For vacuum measurement and control in the range down to 10 -3 mbar, we offer first-class products and services to match your rotary vane pump.

Our vacuum gauge VACUU·VIEW extended covers the extended measuring range 1100 – 10-3 mbar. The fine vacuum control packages include our versatile vacuum controller VACUU·SELECT and all components you need for control in the fine vacuum range down to 10-3 mbar.

Furthermore, we operate a calibration laboratory for vacuum gauges accredited by the Deutsche Akkreditierungsstelle (DAkkS). We offer DAkkS-calibrations in the range from 1300 to 10-3 mbar (abs.).

➝ VACUU·VIEW extended

➝ VACUU·SELECT fine vacuum control package

➝ DAkkS calibration
for vacuum gauges and vacuum controllers

Product overview

Rotary vane pumps
Basic model
Rotary vane pumps
Variants with accessories
Chemistry-HYBRID pump
Basic model
RZ 2.5
2 x 10-3 mbar | 2.3 m3/h
RZ 2.5 +FO +VS 16
2 x 10-3 mbar | 2.3 m3/h
RC 6
2 x 10-3 mbar | 5.9 m3/h
RZ 6
2 x 10-3 mbar | 5.7 m3/h
RZ 6 +FO +VS 16
2 x 10-3 mbar | 5.7 m3/h
RZ 9
2 x 10-3 mbar | 8.9 m3/h
RZ 6 +FO +VS 16 +VACUU·VIEW extended
2 x 10-3 mbar |5.7 m3/h
RE 2.5
3 x 10-1 mbar | 2.3 m3/h
RE 6
1 x 10-1 mbar | 5.7 m3/h
RE 9
1 x 10-1 mbar | 8.9 m3/h

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How often should the oil of the rotary vane pump be changed?

The frequency of oil changes depends on the media used. For smooth operation, it is important to check the condition of the oil regularly. A good indicator is the color of the oil. If the oil is clearly discolored, you should change the oil.

Which oils can I use for the rotary vane pump?

Oils for rotary vane pumps have to meet high requirements, especially in circumstances of continuous operation. Under the following link you will find our offer and information on how to choose the right oil.

➝ Oils for rotary vane pumps

Is the rotary vane pump chemical resistant?

In rotary vane pumps, many parts are made of metal and can therefore corrode when they come into contact with chemicals. In addition, the pumped gases come into contact with oil. Oil vapors disrupt sensitive processes and at the same time the oil is attacked or diluted by the substances. If aggressive media are pumped, you should therefore always install a cold trap upstream to protect the pump from solvent vapors.

In principle, however, rotary vane pumps are not the optimal choice in such cases. The better alternative is the chemistry HYBRID pump. It is the corrosion-optimized combination of a two-stage rotary vane pump and a chemistry diaphragm pump. The most suitable pump for working with aggressive chemicals in the fine vacuum range up to 10-3 mbar is the screw pump VACUU·PURE 10C. It is not only chemically resistant, but also operates oil-free.

➝ Chemistry-HYBRID pump RC 6


What is the function of a gas ballast?

Condensation inside the pump impairs its function and performance and can eventually lead to damage. This problem affects both diaphragm and rotary vane pumps. Many pumps therefore have what is referred to as a gas ballast, which lets in small amounts of air or inert gas to the pump through a valve. This minimizes the condensation of gases inside the pump and ensures that droplets that have already formed are pushed towards the outlet. For many applications in chemistry, this function is indispensable for maintaining performance specifications as well as for the protection of the pump.

What should I pay attention to when connecting the pump?

The correct connection between the pump and the application is important to obtain the best possible ultimate vacuum and pumping speed. Make sure that the connections are as short as possible and have the highest possible line cross-section. Use leak-tight small flange connections and suitable hose material that will not become porous. You can use a suction-side separator as additional protection against particles. The choice of connection components depends on your pump model and the vacuum connection of the application. We will be happy to assist you.

➝ Connection guide

What should I pay attention to when operating a rotary vane pump?

For long service intervals and a long service life of your rotary vane pumps, you should consider a few aspects during operation, care and maintenance. We have summarized these for you clearly on one page:

➝ Golden Rules for the operation of rotary vane and diaphragm pumps

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Rotary vane pumps and chemistry-HYBRID pumps

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