2.5.2 Application notes
In recent years, screw pumps have been replacing oil-lubricated rotary vane pumps in the high pumping speed segment (100 – 600 m3/h)
Their advantages include:
- No lubricant in the gas displacement area
- No contamination of the medium to be pumped
- Higher efficiency thanks to internal compression
- Lower ultimate pressure pB < 10-1 mbar
- Virtually constant pumping speed between 1 and 1,000 mbar
- Good liquid and particulate matter tolerance
- Bearings and seals are protected through low gas pulsation as a result of internal compression
- High-quality axial face seals
- Low noise level thanks to standard-feature silencers and outlet valve
- Temperature-regulated cooling
- Low energy consumption
- Extensive use of standard components
- Mounted ready for connection on a frame with vibration dampers
- Mounted ready for connection on a frame with vibration dampers
This makes HeptaDry screw pumps very well suited for chemical applications or processes that generate dust, e.g. for semiconductor production, or if significant volumes of condensate are produced.
In connection with thermostatic cooling, the water flow volume will depend upon the following parameters: Inlet pressure, gas type, rotary speed and pump size. Because of the waterflow cooling, virtually no heat is dissipated to the atmosphere. This can ease the heat load on any existing air conditioning systems and reduce their energy consumption.
Overview of primary applications:
- Drying, freeze-drying
- Coating
- Electron beam welding
- Metallurgy
- Load locks
- Chemistry
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Headquarters postal address
Pfeiffer Vacuum GmbH
Berliner Strasse 43
35614 Asslar
Germany
P.O. Box
Pfeiffer Vacuum GmbH
Berliner Strasse 43
35614 Asslar
Germany
T +49 6441 802-0
F +49 6441 802-1202