Application of oil-free screw compressors in the food industry

Sprężarki Śrubowe Bezolejowe W Przemyśle Spożywczym

The food industry is one of many industries where compressed air is used. This is where the highest quality requirements are placed on the purity of the compressed air. Due to direct contact with the processed or manufactured product or its packaging, we must ensure maximum safety and prevent contamination with water-oil condensate or vapours of oil used in traditional compressors. For this reason, both screw and reciprocating oil compressors are not recommended.

Oil-free screw compressors were developed for the food industry and for technologies with very high requirements for compressed air purity. Oil-free compressors can be safely used where compressed air has direct contact with the product or its packaging. This is the case at virtually every stage of production, from ingredient preparation and manufacturing to packaging and wrapping.

Compressed air is used for:
• transporting loose products such as flour or powdered milk
• aeration during fermentation in the production of beer and milk products
• selecting loose products such as rice, peas or small fruit on optosorters
• cleaning of packaging and blowing of film sleeves during packing of final products

Each of the above stages may have separate requirements for air volume, moisture content and pressure. To meet market requirements, Airpol offers its customers two groups of oil-free compressors Airpol BS1 and Airpol BS.

Oil-free screw compressors operate in “oil free” technology, rotating screws are not lubricated with oil, but covered with a special coating. This coating provides excellent protection against corrosion and high temperatures, and ensures long-term, failure-free operation of the compressor under full load.

Airpol BS1 series are single-stage compressors with motor powers ranging from 55 to 315 kW and maximum pressure of 3 bar, with capacity range from 800 to over 7000 m3/h. They can be used wherever low pressure, oil-free air is required.

Airpol BS series are two-stage compressors with engine power from 55 to 315 kW and 8 and 10 bar pressure, with capacity range from 400 to 3000 m3/h. These compressors have two compression blocks driven by one electric motor through a gear transmission. An intercooler is mounted between the individual compression blocks.

As a standard, Airpol BS1 and BS compressors are equipped with air coolers finished with cyclone separators that eliminate water from compressed air before it leaves the compressor. It is also possible to use water coolers.

Airpol BS1 and BS series oil-free screw compressors are durable, energy-efficient and quiet sources of compressed air which can be used wherever 100% oil-free air is required.