Natural perfection: Delta Screw Generation 5
New compressor units made by Aerzener Maschinenfabrik GmbH
30/04/2008
Delta Screw Generation 5 stands for the new series of screw compressor units made by Aerzener Maschinenfabrik GmbH. This is the synthesis of the known and successful characteristics of the previous generation with technical innovations.
Aerzener Maschinenfabrik was one of the first compressor manufacturers to design compact units and has developed this machine type continuously ever since. Delta Screw Generation 5 is therefore already the 5th generation of Aerzen compressor units and represents the successful combination of tradition and innovation.
The considerable experience in manufacturing oil-free compressors is the guarantor for high-quality and most reliable compressor units.
However compared to other compressor models this new series offers five main advantages for the customers. Five main advantages that led to the name „Generation 5“.
The Aerzen screw compressors distinguish themselves by two different rotor profiles, which is a criterion which is so far unique on the market for screw compressors.
For low-pressure applications up to 2 bar a specially designed 3 + 4-profile (VML-compressors), for higher pressures up to 3,5 bar a 4 + 6-profile (VM-compressors) is available.
Therefore, depending on the individual case and pressure range the energetically optimal compressor type is available. The energy efficiency increases furthermore by two different pressure outlets per rotor profile, arranging depending on pressure and volume flow for an optimum of internal compression. The different internal pressure ratios avoid possible overcompressions, the efficiency of the machines increases. So, e.g. in the low pressure range up to 2 bar an energetic advantage of more than 20% compared with other compressor models may result.
Furthermore the accessory components of the compressor units were revised technically. Due to innovations in the discharge pressure silencing, pressure losses have been reduced by up to 20%.
In addition as standard only motors of the energy efficient class EFF1 are used. From this result further saving potentials depending on size of up to 3 %. As two thirds of the Life-Cycle-Costs of compressors are determined by the energy consumption, the investment costs, when deciding for an Aerzen compressor unit, already pay off after a short time.
Moreover compared to the previous generation the sound level of the new series Delta Screw Generation 5 could be reduced considerably, on the average by about 6 dB(A) in the individual case even more. Beyond that special attention was given to the fact that absorption material within the silencer elements is no longer necessary and therefore not used. Thanks to the considerable sound reductions, costly special measures (such as e.g. special acoustic hoods) are in most cases no longer needed.
A further distinct advantage for the end user is the ATEX-certification as spark arrester. The translation of the European machine directive 94/9/EG for explosion-hazardous areas is becoming more and more important in all branches and ranges of application. The compressor units made by Aerzener are especially designed for the requirements in categories 2 and 3 for dust- as well as gas zones and certified accordingly.
In addition the new units Delta Screw Generation 5 distinguish themselves by a special solution for explosion protection in pneumatic conveying of bulk material. If combustible bulk material is conveyed pneumatically, in the unit in case of certain dust-air concentrations inflammable mixtures may develop. On the basis of the EU-directive 1999/92/EG (ATEX 137) therefore an additional protection e.g. by means of an external spark arrester in connection with compressors is to be provided. At this point starts the innovative solution of Aerzener Maschinenfabrik:
The newly designed discharge silencer of the Aerzen compressor units is free from absorption material, the sound is dampened only by means of air-redirections. In expensive and practical tests this silencer could now be certified in addition as spark arrester. External spark arresters are no longer necessary! Besides utmost safety, consequently costs are saved and pressure- and energy losses are reduced considerably.
Furthermore the new compressor units Delta Screw Generation 5 distinguish themselves by their very compact construction. Additionally the installation option „Side-by-Side“ is available, i.e. the units can be installed directly one beside the other, without leading to disadvantages for services and maintenances. The reduction of space can therefore lead to savings with smaller machine rooms.
During development of the new units, special consideration has been given to the ease of handling of the machines and reduction of the maintenance expenditure. Easy handling starts with easy installation:
The new design units can be easily transported at site, by means of a four wheel pallet truck and/or fork lift trucks. An integrated service package incl. jack, funnel and initial oil filling simplify the commissioning as well as further service tasks.
The units are being operated from the front. All components requiring maintenance are easily accessible. One of the most important advantages is the new oil system. The oil level can be viewed and checked from the outside of the unit while it is still in operation without any problems. Therefore, compressor shutdowns, process and production interruptions belong to the past.
The patented drive concept with belt drive also leads to a reduction of the maintenance expenditure and thus reduction of the Life-Cycle-Costs. concerning the Aerzen concept the drive motor is installed on a hinged motor mounting plate and with its own weight always arranges for optimal belt tension.
Retensioning – even after a longer period of operation – is no longer necessary. In addition this new concept makes supplementary adjusting of the performance data possible in case of possibly new requirements (pressure/volume flow) by means of easy and favourable-priced changing of the pulleys.
Further advantages of the new series Delta Screw Generation 5 are, that absorption material has not been used for sound dampening (foodstuff-compatibility!), the use of a mechanical fan as well as class 0-certification for the oil-free unit.
The Delta Screw Generation 5 is currently available as belt-driven design for overpressure-, negative pressure- and nitrogen applications in nominal widths DN 125 up to DN 200.
A flexible modular construction makes it possible, that within a range of nominal widths all compressor- and motor sizes in question for belt drive can be installed. Consequently an optimal adjustment to the corresponding performance requirement or later modifications becoming necessary are possible without problems.
For the new series Generation 5 7 sizes are available for intake volume flows from about 270 m³/h up to 2.600 m³/h and overpressures up to 3,5 bar. In vacuum operation VML compressors can be used up to 70% vacuum (0,3 bar abs.), as special design up to 85% vacuum (0,15 bar abs.).
With this individual and innovative concept of the new series Delta Screw Generation 5 Aerzener Maschinenfabrik GmbH has reached a development goal that is already translating the future market requirements successfully.
If you need further information please refer to our leaflets or visit the Aerzener Maschinenfabrik web site under www.aerzener.com or www.generation5.info.
Pessoa responsável:
Aerzen do Brasil Ltda.
Telefone: +55 11 4612-4021
Fax: +55 11 4612-0232
vendas@aerzen.com.br
AERZEN DO BRASIL LTDA.
Rua Howard Archibaldi
Acheson JR 609
CEP 06711-280 Jardim Da Gloria
Cotia - S.P. Brasil
www.aerzen.com.br