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Water-injected single screw compressors

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article image DH-Series – 15, 22 and 37kW models.

COMPAIR has extended its oil-free offering with the introduction of a new range of water-injected single screw compressors.

Designed for applications where there is a need for high-quality 'active' air - air that comes into direct contact with the process it serves - the DH-Series is launched with 15, 22 and 37kW models.

In active air applications, quality of the air is key. High technology industries in particular, including precision engineering, pharmaceutical, food and drink, electronics, chemicals and healthcare, all demand higher quality air. They are also looking for the lowest ownership and operating costs.

The DH single-stage water-injected rotary series is not only the most efficient range of oil-free rotary products available, it offers reduced energy and maintenance costs and hence a lower life time cost than any other compressor in its size range.

Reliable and efficient heart

At the heart of the compressor is an innovative single screw compression element, featuring a single main rotor with six flutes meshing with a pair of 11 tooth gate rotors, that is proven in thousands of installations.

Compression takes place in two chambers above and below the main rotor. As a result compression loads are balanced and bearing loads are significantly reduced. The low bearing loads extend compression element life and significantly reduce lifetime operating costs.

Water injected into the compression element provides lubrication, sealing and cooling. The superior cooling properties of water allow the compressor to operate at a low temperature providing near isothermal compression, low power consumption and class leading efficiency levels.

A reverse osmosis membrane cartridge filters the injection water entering the compressor; as a result the water is always maintained at a high purity level.

100% oil-free construction

Low operating temperatures and bearing loads enable maintenance-free sealed bearings to be used, totally removing the need for lubricating oil in the compressor. 100% oil-free compression is therefore guaranteed and the maintenance and environmental costs associated with oil and oil filter changes are eradicated.

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