Many processes need large volumes of air at only 2–5 bar. Running a standard 8-bar compressor and throttling it down to that level wastes energy, because the machine still compresses air to a pressure the process never uses.
Why dedicated low-pressure machines win
A low-pressure screw air compressor is designed with a different airend profile and a larger flow area so it delivers high volume at low pressure efficiently. Removing the excess pressure head can cut specific power by 15–30% compared with a standard compressor feeding the same process.
Typical applications
- Pneumatic conveying of cement, flour, grains and powders
- Textile spinning, weaving and air-jet looms
- Wastewater aeration and flotation
- Glass blowing and packaging
- Fermentation and aeration tanks
Sizing tips
Measure the actual flow and pressure at the point of use before specifying. Conveying systems are sensitive to pressure drop, so pipe diameter and distance matter as much as the compressor. A low-pressure unit with a frequency converter adds a further saving when demand fluctuates during the day.