09/26/2007 • Automation • Drive Tech

Water-injected screw compressors

Why should one produce the required oil-free compressed air in oil-lubricated compressors, only to then filter out the oil content arising from the working principle of the machine at great expense if one has the option of doing without oil in the production process right from the very outset?

It is not only in the fields of pharmaceuticals, food, electrical engineering and medicine that high quality, 100% oil-free compressed air is required; it is also needed for all applications where top quality products are manufactured.
Stricter regulations and more stringent safety requirements for trouble-free production of sensitive products have led to the operators of compressed air stations rethinking their approach.

LENTO, the water-injected alternative.

The LENTO plants with water-injection are a reliable alternative to the elaborate and cost-intensive treatment of compressed air from oil-injected compressors. The customer can reckon with minimised service and maintenance costs by comparison with other oil-free compression systems

The LENTO series comprises 8 speed-controlled, direct-driven plants with a
15 – 55 kW drive output, infinitely adjustable pressure of 5 – 10 bars and a volumetric flow rate of 0.86 – 8.27 m³/min. In addition to these there are 4 direct-driven plants with fixed speed available to cover the base load requirements. They are able to provide 18 – 27 kW drive outputs, 7 – 10 bars pressure and volumetric flow rates of up to 5.03 m³/min. The plants are available both in water- and air-cooled versions.

A small “revolution” in the development of the LENTO series is the water circulation. An integrated refrigerant dryer constantly withdraws moisture from the air and returns it to the internal water cooling circuit. The compressor is filled just once with normal tap water and thereafter it produces its own fresh water. It is no longer necessary to ensure that expensive fresh water is fed in constantly. The consistent high quality of the water is ensured under all operating conditions by the use of a water filter, a galvanic anode and the constant supply of fresh water via the refrigerant dryer. This means that uneconomical water treatment by means of osmosis filtration is at last a thing of the past.

100% oil-free compressed air produced by the water-injected LENTO screw compressors offers compressed air of the highest quality and therefore meets the requirements in terms of the continuity and quality of many manufacturing processes.
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ALUP Kompressoren GmbH

Nürtinger Straße 10
73257 Köngen

Phone: +49(0)7024/802-700
Fax: +49(0)7024/802-743