Technology
Radial blowers
Large air volumes at low pressure differences: the impeller turns fast and without contact. 3 current models from Becker and Elmo Rietschle – usable as a vacuum generator or as a compressor.
Compare 3 modelsHow the technology works
- 3models
- 3series
- 2manufacturers
- 2,500 m³/hhighest pumping speed (50 Hz)
Touch the points: the parts explain themselves.
Manufacturers and series
Manufacturers and series
Each series leads to its page with all models. “Show only …” sets the filter of the product overview.
Becker
2 models · 1,570 m³/h
Elmo Rietschle
1 model · 2,500 m³/h
Product overview
Compare all 3 models
The filters on the left narrow down the selection by the key figures of the models – for 50 or 60 Hz.
Becker VARIAIR RV series 1 model
VARIAIR RV 2.1944/10Pumping speed 1,570 m³/h 50 Hz1,570 m³/h 60 HzUltimate pressure Becker VATP series 1 model
VATP 1600Pumping speed 1,570 m³/h 50 Hz1,570 m³/h 60 HzUltimate pressure Elmo Rietschle F-RB series 1 model
F-RB 1175Pumping speed 2,500 m³/h 50 HzUltimate pressure 855 mbarNo model matches these filters.
Becker VARIAIR RV series 1 model
Becker VATP series 1 model
Elmo Rietschle F-RB series 1 model
Models that a manufacturer no longer carries in its current range are not part of this overview; they are listed in its “Outdated models” section – for example under outdated Elmo Rietschle models.
Operating principle
How a radial blower works
The impeller turns at high speed. The air enters axially at the centre, is deflected into the radial direction in the blade channels and accelerated outwards by centrifugal force. In the volute casing the flow is slowed down; in the process, part of the velocity energy is converted into pressure.
The drawing shows the basic principle. The designs of the individual manufacturers differ in detail.
- EntryThe air flows through the inlet opening (A) into the centre of the impeller (B).
- AccelerationIn the blade channels (C) it is accelerated outwards and leaves the impeller at its edge.
- Pressure build-upIn the volute casing (D) the air is slowed down; part of its velocity energy becomes pressure before it flows through the outlet opening (E).
Key figures
The technology in figures
The ranges result from the current models in our range.
Pumping speed (50 Hz)
1,570 to 2,500 m³/hin our range
Pressure difference instead of ultimate pressure
Radial blowers are built for large air volumes at low pressure differences. The manufacturers therefore state the pressure difference that can be reached in suction operation and in pressure operation; it is given in the technical data of the models.
What characterises the technology
Large air volumes
Radial blowers are suitable for processes that need high volume flows at a low pressure difference.
Vacuum or pressure
The blowers work as vacuum generators or as compressors.
Speed control
A frequency converter adapts the air volume to the demand.
Contact-free running
The impeller turns without contact; as a result the blowers work with little wear and little maintenance.
Advantages
What speaks for this technology
- High volume flows
- Contact-free running
- Low wear and low maintenance
- Speed control via frequency converter
- For vacuum and pressure
- Quiet, low-vibration running
Applications
Where they work
- Environmental technologyextraction systems, aeration systems, drying, waste water treatment
- Textile industryextraction, drying
- Packagingfood packaging, extraction of film edge trim
- Conveying technologypneumatic conveying systems
- Printing industryair supply for printing and print finishing machines
- Further applicationscentral vacuum systems, fuel cells, electronics
Frequently asked questions
Questions about radial blowers
How does a radial blower work?
A fast-turning impeller draws in the air at its centre and accelerates it outwards by centrifugal force. In the volute casing the air is slowed down; in the process, velocity becomes pressure. The drawing in the section Operating principle shows every step.
What are radial blowers suitable for?
For processes that need large air volumes at low pressure differences – in suction operation as well as in pressure operation.
What is the difference between radial blowers and side channel blowers?
Both compress without contact. In the side channel blower the gas passes through the impeller many times and so reaches higher pressure differences. The radial blower accelerates the air outwards once and conveys large volumes at a low pressure difference.
From which manufacturers does Ehrler & Beck carry this technology?
Currently from Becker and Elmo Rietschle. The series are listed in the section Manufacturers and series.
How do I find the right model?
In the product overview, the filters narrow down the selection by the key figures of the models. For sizing, it is best to tell us the gas to be conveyed, the working pressure and the flow rate you need – we will be glad to advise you.
What do the figures for 50 Hz and 60 Hz mean?
Flow rate and rated motor power depend on the mains frequency. The overview therefore shows both values wherever the manufacturer states them, and the size filters can be switched between 50 Hz and 60 Hz.
Does Ehrler & Beck also supply spare parts and service?
Yes. Ehrler & Beck offers original spare parts and accessories as well as maintenance and repair.
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.
