• 28Issue 28

    November 2014
  • 27Issue 27

    June 2014
  • Issue 26Issue 26

    November 2013
  • 25Issue 25

    June 2013


  • SerieHealth and Work Protection

    4 Artikel
  • SerieReference Report

    10 Artikel

Weiterführende Infos zum Artikel:


Information according to Section 5 of the German Telemedia Act (TMG)

NEUMAN & Esser Verwaltungs- und Beteiligungsgesellschaft mbH
Werkstr. w/o no.
52531 Übach-Palenberg

Tel.:      +49 (0) 2451 – 48101
Fax:      +49 (0) 02451 – 481100

Managing Partners:
Alexander W. Peters
Stefanie Peters

Register Entry:
Entry in the Commercial Register
Register Court: District Court Aachen
Register number: HRB 9573

Value-added-tax Identity Number in terms of Section 27a Sales Tax Law

Content Liability

The content on our pages is created with the greatest care. However, we cannot assume any guarantee or liability for the content’s correctness, completeness and topicality.

As a service provider we are responsible for our own content published on this website according to Section 7 Para 1 TMG in accordance with general laws. However, pursuant to Sections 8 to 10 TMG we, as a service provider, are not obliged to monitor transmitted or stored third party information or to search for circumstances which point to illegal activities. Obligations to remove or block the use of information in terms of general laws remain unaffected hereof. A relevant liability is, however, only possible from the moment we become aware of an actual infringement. We will immediately remove such content once we become aware of corresponding infringements.

Liability for Links

Our offer includes links to external third-party websites which are outside our sphere of influence. Therefore, we cannot assume any guarantee for such third-party content. The relevant provider or operator of the linked pages is always responsible for the content. The linked pages are checked for possible legal infringements at the time the link was created. No illegal content was recognizable at the time the link was created. A permanent control of the content of the linked pages is, however, unreasonable without concrete indications of an infringement. As soon as infringements become known, we shall immediately remove such links.


Content and works created by the site operator on these pages are subject to German copyright law. Duplication, processing, distribution and any kind of exploitation beyond the scope of copyright law require the written approval of the relevant author and/or creator. Downloads and copies of this page are only permitted for private and non-commercial use. As far as the content on this page was not created by the operator, any third-party copyright has been taken into consideration. In particular, third party content has been marked as such. Should you nevertheless become aware of a copyright infringement, please kindly notify us. As soon as infringements become known, we shall immediately remove such content.

All material on this site, including graphs and texts, is owned by the company and may neither be reused nor republished without approval.

Responsible for content pursuant to section 55 paragraph 2 RStV
Martin Grolms

Dispute settlement 

The European Commission provides a platform for online dispute resolution:

We do not participate in a dispute settlement procedure before a consumer arbitration board and are not obliged to do so.

External Data Protection Manager according to the Federal Data Protection Act:

Stefan Kleinermann


Digital Noises

Our website is hosted at

Mittwald CM Service GmbH & Co. KG
Königsberger Straße 4-6
32339 Espelkamp

Data protection

Privacy Policy NEUMAN & ESSER GROUP – Your data is safe with us

Data protection is a matter of trust and your trust is important to us. We respect your privacy and personal sphere. The protection and lawful collection, processing and use of your personal data is therefore an important matter for us. In order to ensure that you feel secure when you visit our websites, we strictly observe the legal provisions when processing your personal data and would like to inform you here about our collection and use of your data.

Scope and purpose of the data processing

1. Anonymous data collection

You can visit our site without providing any information about your person. We only store so-called “server log files”, i.e. access data without any reference to a specific person such as the name of your Internet provider, the Internet browser you use, the page from which you visit us, the date and time of your access or the name of the requested file. This data is evaluated exclusively in order to improve our offers and does not allow any conclusion to be drawn about your person.

This anonymous data is stored separately from any personal data you may have provided and therefore does not enable any conclusions to be drawn about a particular person. This data is evaluated for statistical purposes so that we can optimise our internet site and our offers. The legal basis for the temporary storage of the data and the “server log files” is Art. 6 para. 1 (f) of the GDPR. The data is stored in log files in order to ensure the functionality of the website. The data is deleted as soon as it is no longer required to achieve the purpose of its collection. In the case of the collection of data for the provision of the website, this is the case when the respective session has ended.

2. Collection and processing of personal data

If you wish to make use of a service provided by our company via our website, it cannot be ruled out that the processing of personal data is required. If there is no legal basis for the processing of personal data, we will obtain the consent of the data subject for this purpose. This will be evident in appropriate locations. This may be necessary if you register on our website, request our newsletter or if you contact us through our contact form. The legal basis for processing operations for which we obtain your consent for processing purposes is based on Art. 6 I (a) of the GDPR. If the processing of personal data is necessary for the fulfilment or initiation of a contract (e.g. for the delivery of goods or the provision of such services or for enquiries about our products and services), the processing is carried out in accordance with Art. 6 I (b) of the GDPR.

We store and use the personal data transmitted by you, such as the name, firm, address, E-mail and telephone, for the purposes of individual communication with you in accordance with the General Data Protection Regulation (GDPR) and the “Federal Data Protection Act (BDSG) new”. Please note that in general, no confidential information should be sent via the contact form.

The legal basis for the processing of the data transmitted when an E-mail is sent is Art. 6 para. 1 (f) of the GDPR. If the objective of the E-mail contact is the conclusion of a contract, the additional legal basis for the processing is Art. 6 para. 1 (b) GDPR.

3. Cookies

Among other things, our website uses so-called “cookies”, which serve to make our website more user-friendly, effective and secure overall – for example when it comes to accelerating the navigation on our platform. Furthermore, cookies enable us to measure the frequency of page views and general navigation, for example. Cookies are small text files that are stored on your computer system. We would like to point out that some of these cookies – which are usually so-called “session cookies” – are transferred from our server to your computer system. “Session cookies” are characterised by the fact that they are automatically deleted again from your hard disk at the end of the browser session. Other cookies remain on your computer system and enable us to recognise your computer system on your next visit (so-called permanent cookies). You can of course reject cookies at any time, provided that your browser permits this. However, we would like to point out that in this case it may not be possible to use all of the functions of our website in full. When you visit our website, you will be informed about the use of cookies for analytical purposes and your consent to the processing of the personal data used in this context will be obtained. Within this context there is also a reference to our Privacy Policy. The legal basis for the processing of personal data using the technically required cookies is Art. 6, para. 1 (f) of the GDPR. The legal basis for the processing of personal data using cookies for analytical purposes – provided that your consent has been submitted – is Art. 6 para. 1 (a) GDPR.

4. Use of plugins

This website uses functions of the web analysis service Google Analytics. The provider is Google Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, USA. Google Analytics uses so-called “cookies”. These are text files that are stored on your computer and enable an analysis of your use of the website. The information generated by the cookie about your use of this website is transferred as a rule to a Google server in the USA and saved there.

The information generated by these cookies, such as the time, place and frequency of your website visit, including your IP address, is transmitted to and stored by Google in the United States.

We use Google Analytics on our website with an IP anonymisation function. In this case, your IP address is shortened by Google within Member States of the European Union or in other contracting states of the European Economic Area Agreement and therefore made anonymous.

Google will use this information to evaluate your use of our site, compile reports on website activities for us and provide further services related to website and internet use. Google may also transfer this information to third parties if this is required by law or if third parties process this data on Google’s behalf.

According to its own information, Google will under no circumstances associate your IP address with other Google data. You can prevent the installation of the cookies by selecting the appropriate settings on your browser; we point out, however, that in this case it is possible that you will not be able to fully use all the features of our site.

Furthermore, Google offers a deactivation option for the most popular browsers, which gives you more control over which data is collected and processed by Google. If you activate this option, no information about your visit to the website will be transmitted to Google Analytics. However, activation does not prevent information from being transmitted to us or to other web analysis services that we may use. For more information about the deactivation option provided by Google and how to enable this option, please visit the following link:

We use the web analysis service Matomo on our website. Matomo uses cookies for this analysis. Cookies are small text files which are saved on your computer and enable you to analyse the use of the website. The information generated by the cookies, such as the time, location and frequency of your website visit, including your IP address, is transmitted to our Matomo server and stored there. Your IP address will be immediately anonymized during this process, so that you as a user remain anonymous for us. The information generated by the cookie about your use of this website will not be passed on to third parties. You can prevent the installation of the cookies by selecting the appropriate settings on your browser; we point out, however, that in this case it is possible that you will not be able to fully use all the features of our site.

If you do not agree to the storage and evaluation of this data about your visit, you can object to its storage and use at any time by clicking on it below. A so-called opt-out cookie will then be stored in your browser, which means that Matomo no longer collects any data about your visit whatsoever. Please note that if you delete the cookies in your browser settings, this may also result in Matomo’s opt-out cookie being deleted, which you may have to activate again.

We use a so-called “Content Delivery Network” (CDN), offered by Fritz Managed IT GmbH, Oedenberger Str. 155, 90491 Nuremberg, Germany. A CDN is a service that delivers faster content from our online offer, especially large videos, regionally distributed and internet-connected servers. The processing of the data of the users takes place solely on the aforementioned purposes and the maintenance of the security and functionality of the CDN.

Further information can be found in the privacy policy of Fritz Managed IT GmbH:

It may happen that third-party content, such as videos from YouTube, map material from Google Maps, RSS feeds or graphics from other websites, are incorporated into our web pages. This always assumes that the providers of this content (hereafter referred to as “third-party providers”) are aware of the IP address of the users. The reason for this is that without the IP address, they could not send the content to the browser of the user concerned. The IP address is therefore required for the display of this content. We make every effort to use only such content whose respective providers use the IP address only for the delivery of the content. However, we have no influence on this if the third-party providers store the IP address, e.g. for statistical purposes. If we are aware of this, we inform the users about this.

5. Affected rights

According to the General Data Protection Regulation (GDPR) you have the right to free information about your stored data. You also have the right to receive details of information for processing purposes, categories of the personal data which is being processed, recipients or categories of recipients to whom the personal data has been or will be disclosed (particularly in the case of recipients in third countries or international organisations), if possible the planned storage period of the personal data, a right to rectification, restriction (blocking) or deletion of this data, as well as the origin of the data. You also have the right of appeal to a supervisory authority. In addition, you have the right to revoke your declaration of consent under data protection law at any time. The revocation of consent will not affect the legality of the processing carried out on the basis of the consent until revocation.

6. Transferability of data

You have the right to receive the personal data which comes directly from you. Upon your explicit request, we will make this data available in a machine-readable and structured format. For this, proof of your identity is required.

7. Data security

Your personal data is transmitted over the Internet in encrypted form using TLS. We secure our website and other systems by technical and organisational measures against loss, destruction, access, modification or the distribution of your data by unauthorised individuals. Access to your customer account is only possible after you have entered your personal password. You should always keep your access information confidential and close the browser window when you have finished communicating with us – especially if you use a public computer or share the computer with others.

8. Deletion and Restriction (Blocking) of Personal Data

Your personal data will be deleted and restricted (blocked) after the purpose for which it is collected no longer applies, provided that it is no longer required for the fulfilment or initiation of the contract, taking into account retention periods based on laws and/or tax regulations.

9. Contact option

On our website we offer you the option of contacting us by E-mail and/or by means of a contact form. In this case, the details you provide will be stored for the purposes of processing your contact details. Your consent will be obtained for the processing of the data within the scope of the dispatch process and reference made to this Privacy Policy. Alternatively, you can contact us via the E-mail address provided. In this case, the personal data of the user which is transmitted by E-mail will be stored. There is no disclosure to third parties. There is also no comparison of the data collected in this way with data that may be collected by other components of our site.

10. Further information and contacts / Party responsible

If you have any further questions on the topic of data protection, please contact us. If you have any questions regarding the collection, processing or use of your personal data, the information, correction, restriction (blocking) or erasure of data or the cancellation of consent that you have issued, please contact us:

NEUMAN & ESSER Verwaltungs- und Beteiligungsgesellschaft mbH

Anton Schmidt

Werkstraße o. Nr.

52531 Übach-Palenberg, Germany

Telefon: +49 (0) 2451 / 481 – 187


11. Download and print

You can also download this text in PDF format. In order to view and print PDF files you need a PDF viewer, which you can download free of charge from Adobe Systems GmbH, for example. You can print the PDF file using Adobe Reader by selecting Print from the File menu.



NEA eNEWS Issue 31


Embracing The Digital Age

The „Digital Transformation“ is often equated with the Industrial Revolution of the 19th century. Yet while the topic has dominated the media almost like no other, many are still struggling to grasp its full significance. Although the majority of businesses see great opportunities for growth through digitalization, they are less clear on what concrete steps to take to realize these.

Digitalization affects every industry in a multitude of ways. New business models continually emerge, external competitors open up unexpected market niches, and customer demands and needs never cease to evolve.

In addition, the collection, analysis and intelligent use of big data have become indispensable to creating added value for clients. The cross-linking of data both within the individual company and with business partners results in greater transparency and flexibility.

Yet the potential of digitalization can only be realized if the entire workforce is ready for the digital change, making it paramount to foster acceptance of new processes and motivate staff to critically review established methods and develop new approaches. The success of any digitalization strategy is heavily dependent on this. As entrepreneurs it is our task to promote a culture of open-mindedness and reduce reservations. The well-blended age distribution of staff at NEUMAN & ESSER, including the large proportion of generation Y, is of great value in achieving this aim.

NEA GROUP understands that the digital age presents great opportunities, and has already started pursuing these. In an initial workshop, senior global management quantified the potential digitalization holds for the GROUP, and devised concrete projects. Parallel involvement in the digitalHUB Aachen e.V. network, an association bringing together start-ups and local mid-sized IT companies with potential clients in industry and commerce, is expected to produce additional exciting approaches.

A further novelty in this edition is its structure, which now mirrors the three business units of Compressor Technology, Mechanical Processing Technology and Sealing Technology, with NEA NEWS now featuring articles from STASSKOL. This means readers can now easily find innovations and reference reports in these fields. This year’s anniversary was also a milestone we are pleased to present – 125 years of the Peters Family at NEUMAN & ESSER. We hope you enjoy reading the NEA NEWS and NEA eNEWS!

Stefanie Peters und Alexander Peters
Managing Partners

New Compact Solution

Two Different Compressor Technologies Combined

With 2.5 million inhabitants and an annual influx of up to 14 million foreign tourists Dubai has a huge hunger for energy, among other things for desalination of sea water and air conditioning.

The company DUSUP is responsible for energy supply to the Emirate. In 2010, DUSUP built a terminal, which enables the import of liquefied natural gas (LNG) via a Floating Storage Regasification Unit (FSRU). The FSRU is a converted LNG tanker which is permanently moored. The liquefied, -160°C cold LNG is heated here and transported onshore in a gaseous status.

Due to the increased energy demand in Dubai, DUSUP hired Excelerate Energy to provide a larger and more efficient FSRU. Excelerate’s existing FSRU Explorer was not only upgraded to achieve send out rates as high as 1.0 Bcf/d, but it also received additional upgrades. The FSRU now includes an LNG bunker port to service small-scale LNG offtakers, and can also provide gas-up and cool-down services to LNG vessels leaving dry dock.

The 290-meter-long (950ft) and almost 45-meter-wide (150ft) ship has an LNG storage capacity of 151,000 cubic meters. The Explorer covers its own energy requirements with dual fuel generator sets. Engines which can use two fuels such as clean natural gas and cheap diesel are defined as dual fuel engines. This system is currently being implemented in shipbuilding because the exhaust standards in the ports are becoming more stringent worldwide. The upgraded Explorer can therefore also tank dual fuel ships.

Combination of Centrifugal Compressor and Recip

In order to be able to feed the natural gas into the national grid, it must be adapted to the network operator’s requirements. The feeding system for the local pipeline network consists of a combined centrifugal compressor and reciprocating compressor, a joint project by Atlas Copco Gas and Process together with longstanding partner NEUMAN & ESSER (NEA). Furthermore, Atlas Copco Gas and Process, the leading, internationally active industrial company with many years’ experience in the LNG business, provided the supervisory control system.

The suction condition from the LNG tanks for the upstream turbo centrifugal compressor from Atlas Copco is about 1 bar abs. at -140°C (-220°F). The first two compressor stages permanently compress 5,500 kg/h gas to 6.5 bar.

From there, some 1,000 kg/h reach the generators for producing electricity or reliquefying gas in the recondenser. In the next step, the two stage so called send out compressor from NEA supplies some 4,500 kg/h of the 40°C (104°F) natural gas at 70 bar. The recip is running in during energy requirement peaks, loading processes as well as the entire winter period.

The NEA compressor offers the high flexibility of this particularly compact solution. It also works highly efficient under variable operating conditions; its effectiveness hardly changes. Therefore, this combined system consisting of two different compressor principles is ideal for large throughput quantities and non-continuous conditions.

»Coordination with Atlas Copco Gas and Process was collaborative and at eye level.«

Successful Integration of Two Technologies

As for all offshore machines, this system also requires marine classification. NEUMAN & ESSER definitively has exceptional experience in marine classification. The NEA compressor on the floating liquefied natural gas platform Prelude, the largest swimming factory ever constructed, had to meet the requirements of Marine Class 1A from Lloyd’s Register of Shipping. For this purpose, the compressor had to prove that it can withstand wind gust speeds of up to 330 km/h (205 mph) as well as a maximum wave height of 27.5 m (90ft).

For NEA Project Manager Karl-Heinz Hammes, the challenge was greater than merely the technical aspects of the FSRU project: “Coordination with Atlas Copco Gas and Process was collaborative and at eye level. Nonetheless, it is not easy to integrate both different systems, a centrifugal compressor and a recip, into one configuration. That requires a lot of agreement and communication between everyone involved.” The fact that Karl-Heinz Hammes and his team mastered this task with flying colors can even be seen in the meantime because the system has already been running in the Gulf of Dubai without any problems for several weeks (location of the vessel).

For a new LNG market order, the NEA recips will be found on the cold side this time around. Installation will take place at an LNG terminal in Russia, close to St. Petersburg. NEUMAN & ESSER will deliver two recips at suction temperature of -160°C (-256°F).

NEAC & Dresser-Rand

Magnum Valves Like it Tough

Within the course of the collaboration between NEAC Compressor Service in Germany and Dresser-Rand Co. in the USA, further opportunities arose to improve the reliability of reciprocating compressors with NEAC customers’ in several locations.

What do reciprocating compressor operators worry about most when they are equipped with plate valves or ring valves? The response: oil, liquids and process residues. However, in refineries, oil, oily liquids up to aqueous components in gas are everyday occurrences. Short valve running times are often the result.

If long running times are required

NEAC Compressor Service has added a new valve to its portfolio: the “Magnum” Valve. It is not actually new, but in Europe it is an emerging valve. It is a problem solving valve from the USA, where it has already proven its value thousand-fold under tough conditions in Refinery applications for many years. Operators report “dramatic” improvements in running time after changing to Magnum Valves.

The sealing elements are neither concentric rings, plates or “poppets” but small, compact cylindrical sealing elements which all work independently. Wobbling as with plates or rings no longer exist and bending/breakage of valve plate ligaments are eliminated. This makes its robustness of the Magnum Valve self-explanatory. The gas flow is fed through a large number of straight drilled holes which also acts as a multi-bore orifice plate.

Magnum Valves ensure minimum pressure loss, a reduction of the noise level and a potential reduction of gas pulsations in the cylinder. NEAC has verified that the Magnum Valve is equal to or more efficient than the valve it is replacing by measurement and pV diagram analysis.

As few components as necessary

With a view to the often “tougher” applications, Magnum Valves are kept as simple as possible with a few components. Therefore, no replaceable valve seat plates or similar exist. There is only one sealing element for each Magnum Valve type (Standard or HammerHead style) and a total of eight “color coded” springs. With these, all valves are easily repaired worldwide as required with minimal valve spare parts inventory.

Therefore, the repair costs for a Magnum valve are considerably lower than for overhauling a plate or ring valve. It is so easy to overhaul Magnum Valves that any specialist workshop or the operator can do it themselves with simple tools found in any typical maintenance workshop. The success of the Magnum Valves installed by NEAC so far speak for themselves.


Interview with Stefan Damberg

NEAC Compressor Service took over the aftermarket support of the HOFER diaphragm and reciprocating compressors in the Oil & Gas segment in Europe. NEAC has served this area for more than 25 years for numerous OEM compressor makes. Martina Frenz interviewed Stefan Damberg, Service Product Manager HOFER in order to gain an insight into his new service world.

How did your customers react to the information that NEAC will provide service support for HOFER machines? The feedback from the HOFER customers was very positive. As expected, the customers with significant problems contacted us first. This comes from the fact that HOFER was not previously geared as a service company, but for capacity reasons only employed three service technicians directly from the works for worldwide deployment.

What services does NEAC offer the HOFER customers? What advantages does this provide you with? The portfolio is large. Thus, HOFER customers can now access a globally acting service organization, enjoy active sales support and trained and certified service technicians are available for servicing, overhauls and repairs. As a Product Manager, I am there to support with improvements and technical solutions.

What conclusions can you draw from the first six months of NEAC service calls? From April until now, we have had some 40 service calls. Initially, four service technicians were trained intensely in theory and practice for one week, a second training phase took on three technicians as the requirements were higher than assumed. Moreover, an electrician was specifically trained for HOFER machines, who “finds his way into” the control technology. So HOFER really keeps us on our toes!

With which customers do you have framework agreements for reciprocating compressors? How is this handled for diaphragm compressors? We already have framework agreements with large refineries, industrial gases operators and further customers. For most of them, the diaphragm compressors were unbureaucratically added to the existing contracts.

With HOFER, NEAC supports the 12th OEM compressor brand. Does the learning curve become steeper with each new license? Virtually vertical with HOFER! The difference with HOFER as opposed to the other OEMs is that we have to do with a living and highly demanding product. This means that conclusions from the service calls flow into the further development and therefore also directly into the manufacturing processes for these machines.

What do you particularly enjoy in your job as a Product Manager? My main task consists in the further development of the HOFER product with regard to service. I “helped out” personally with the first jobs in order to gain a better understanding of the product down to the last detail. The service for diaphragm compressors also includes the motor, valves and the controller. Therefore, it is wider ranging than for reciprocating compressors for which mostly purely mechanical work is needed. An exciting task!

What is the next step at NEAC Compressor Service? On Jan. 1, 2017 phase 2 of the integration of HOFER at NEAC starts. The internationalization will be tackled. Following further training, selected locations such as the USA, Dubai and India will be perfectly prepared for their work.

Challenge Boundaries

The New GRC Air Classifier Provides Revolutionary Results

An important feature of plastics is that their properties such as formability, hardness, elasticity, and strength or temperature resistance vary when additives and fillers are admixed and can be adapted to the needs of the respective application, whereby additives are normally being applied in smaller quantities. Filling materials are primarily extenders which replace expensive raw materials with less costly ones for plastics production. However, some of these also improve various final product properties.

The most frequently used filling materials for plastics are calcium carbonate and talc powder. Calcium carbonate improves the mechanical strength properties and the weathering resistance while talc powder improves stiffness and resistance to thermal distortion.

The particle size distribution of a filling material is a decisive factor for the properties of a plastic. When manufacturing the filling materials, a precisely defined particle size distribution is achieved by grinding and subsequent separation, the so-called classification.

This classification step of the particles is a general requirement after grinding in a mill. While it is preferred to integrate the separation process into the mill itself, external air classifiers are commonly being used. Such is the case especially with ball mills.

Classification of solids with GRC air classifiers

Even prior to grinding, the use of an air classifier can be advantageous. If the feed material for the grinding process already contains a large quantity of desired final product, it makes sense to separate the fine material fraction in advance. Firstly this material no longer burdens the mill and secondly overgrinding of such material is being avoided.

The NEUMAN & ESSER (NEA) air classifier GRC (Guide Ring Classifier) is such an air classifier allowing both types of above mentioned operations.

The initial GRC layout was designed for the classification of roughly 200 μm to 20 μm (1 μm = 0.001mm) particles.

The air classifier divides the so-called feed material into fine material on one side and coarse material on the other side. The size GRC 820 at the NEUMAN & ESSER Test Center achieves throughputs of several tons per hour for medium fineness. For classification in the higher fineness range, throughput is reduced to several hundred kilograms per hour because the number of particles to classify increases exponentially: if 0.1 mm sized particles are crushed to 0.01 mm, the number of particles increases thousand-fold at the same time.

The feed material is fed into the GRC from the top using a vertical pipe. After falling onto a distribution plate above the classifier wheel the material is thrown to the outer diameter of this plate. There, the material drops into a ring gap between the classifier wheel on the inside and the air guidance ring on the outside.

The inflowing air now carries the particles into the classification zone. Here fine particles are allowed to pass whereas too large particles are being rejected.

After passing the classifier wheel the fines leave the classifier housing directly beneath the classifier heading for the downstream filter where the finished product is being discharged from the system.

The rejected fraction drops to the bottom of the housing and leaves it via a discharge airlock.

Multiple improvements provide a revolutionary result

In order to improve the already existing high performance, NEUMAN & ESSER has now made essential improvements to the GRC air classifier.

Ideally a perfect classifier allows only a very specific size of particle and below to pass. Since this is technically not feasible on a production scale the range of particle size above and below the target value defines the quality of such a classifier; the so called “cut efficiency”. The smaller the range, the better the classifier. NEA experts focused on how to intensively separate fine and coarse in the feed material, dispersing as it is called by the experts and on efficiently guiding the material through the GRC classification process.

Only if the solids exist as individual particles in the classifying zone, the classifier can effectively remove the desired fraction from the feed material, thus classifying two precisely defined partial quantities.

The new GRC design features now a distribution cone in the inlet of the feed material above a significantly redesigned dispersing unit. After sliding down the cone and passing the dispersion zone, the material reaches the known ring gap. In contrast to the former design now a virtuously engineered guide vane ring handles the transportation into the direction of the classification zone.

Extensive and detailed testing with the new NEA classifier revealed an unexpected magnitude of improvements not only in yield, throughput and energy consumption but also in the range of achievable fineness. The new design now allows widening the possible fineness range from 200 μm to 2 μm instead of 20 μm!

Different sizes of the revolutionary new GRC air classifier are available for various throughputs and applications not only in plastics but also for minerals, paints and coatings, in the chemical sector or for applications in the food industry, wherever they are needed.


The Balanced Oil Sealing Solution BOSS, which is registered for patent approval, is a new development from the STASSKOL Development Center. The innovative design of this oil wiper system connects excellent scraping effectiveness with gas-tightness inherent in the product. The major components of the BOSS system are two oil wipers and a pressure ring which ensures an axial tension of the system.

This reduces oil leakage to a minimum. Each oil wiper consists of two scraping rings which overlap and have separate scraping edges. These scraping edges are in linear contact to the rod, reducing “oil film floating” and maximizing scraping effectiveness. Moreover, they have a special geometry, which enables a “back pumping effect” due to hydrodynamics.


STASSKOL uses in-house manufactured sealing materials for the BOSS oil wiper system. Comprehensive tests have shown that SK406 and SK901 are most suitable for this purpose.

SK406 is a PTFE (polytetrafluorethylene)-based material, whereas SK901 is manufactured based on PEEK (polyetheretherketone).

Both polymers provide mechanical stability and high wear resistance. This is important in particular because the scraping edges are in a line contact with the piston rod and are therefore subjected to a high contact pressure.


Most of the BOSS sealing elements are manufactured on the CTX800TC. The lathing and milling center from DMG Mori, constructed in 2015, is equipped with state-of-the-art 3D control technology.

Each of the 24 tool stations can optionally be equipped with four tools, meaning that all processing takes place on the main spindle.

That enables the manufacturing of the sealing rings using one single step. Manufacturing thus gains valuable time because set-up time is reduced. Work pieces with diameters of up to 320 mm and a turning length of 250 mm are processed on the CTX800TC.


International Footprint

Established in mid 2015, STASSKOL, Inc. located in Katy, Texas is designed to manufacture the full range of STASSKOL products for both the reciprocating compressor and rotary equipment industry. STASSKOL, Inc. is set up to service the US, Canada and South American OEM markets. The first components were produced in Katy in late 2015 using raw materials produced in STASSKOL located in Stassfurt, Germany.

The manufacturing equipment includes both manual and CNC state of the art production machines, and more will be added as business expands. STASSKOL, Inc. also holds an extensive stock of raw material in order to provide short delivery times as demanded by the US market.

STASSKOL, Inc. started with a total of three employees. Leon Alvarez, Sales Manager, Doug Day, Production Manager and David McFadden, Inside Sales Manager. This has now increased to five with two production operators and will continue to increase as sales and production increase with the addition of further production staff as well as engineering and sales support personnel.

Since production started, STASSKOL, Inc. has steadily increased its customer base and with its OEM only approach being well accepted by the US customers. STASSKOL, Inc. recently received ISO 9001 accreditation under the NEA umbrella and is working on a number of development projects with major new customers. The OEM culture developed by STASSKOL Group meets the expectations of an OEM like Dresser-Rand, a Siemens Business, and both companies are working closely together in providing solutions for this market.

In establishing this first satellite manufacturing facility, STASSKOL has become recognized as a global brand and is now regarded as a key company in the reciprocating compressor industry. The lessons learned will be invaluable as STASSKOL increases the size of its international footprint.

The Official Reception

Celebrating anniversaries is a fixed part of tradition at NEUMAN & ESSER. The Official Reception ceremony on the occasion of the 125-year anniversary of the Peters family on June 9 again included several highlights for the approximately 250 guests invited. On this celebratory occasion, both the inner courtyard between the two new annexes and the foyer of the administration building were transformed into an inimitable event backdrop.

Adequate space for the celebratory blessing of the building by the theologian Klaus Ahlert, the ceremonial addresses and a culinary “flying lunch”. Each program item was stylishly accompanied by the cantor and professor Stefan Palm with his daughter Laura on classical instruments.

The speeches were riddled with sustainable messages. A real “hidden champion” was the term used by Marcel Philipp, Lord Mayor of the City of Aachen, when referring to NEUMAN & ESSER and he praised the company’s regional roots which also strengthen the local economy. This is often attributed to the top management of family companies, which is usually geared to a period of 30 years and longer, as Prof. Dr. Peter May, guest speaker and shareholder of his consultancy company of the same name.

During his speech, Klaus Peters provided evidence of this as he strikingly passed the crises and challenges encountered by the first three generations in review. Following this, Alexander Peters knew how to emphasize the catchwords Technology and Quality Leadership as vital prerequisites for the competitive ability of his fourth generation.

“NEUMAN & ESSER has a soul”, as Stefanie Peters resumed during her contribution to the tradition of values within her company and drew attention to the tradition of values within her company and the challenges of Knowledge Management and Digitization of the Economy at the end of the ceremony. In 2030, such a celebratory occasion should recur. Because then NEUMAN & ESSER much looks forward to its 200-year anniversary.

Open Day in Übach-Palenberg

Just two days later, the entire company premises was prepared as for a folk festival. On June 11 the time was ripe for: opening the gates for the big Open Day for the staff and the general public!

No wishes were left unfulfilled by the family anniversary’s program. A look behind the scenes of the plant was also provided, as in the Test Center and the apprenticeship trades. 84 employees and apprentices helped busily with demonstrations of machines and products. Several show acts spread over the company premises ensured excitement, fun and games.

When the influx of visitors reached its record peak of several thousand, the stage became the focus of the event. Because the Peters family provided an insight into the stations of the company’s history and its tradition of values as well as showing its social commitment for charity organizations during the course of an interview.

Thus, this year’s donation of 5,000 EUR went to the Förderverein für Kinder und Jugend Frelenberg. [Booster Club for Children and Youths] As a thank-you the dance groups of the booster club demonstrated their abilities and contributed, in addition to several further attractions, to an unforgettable day. However, the day only ended after sunset for the workforce because the cover band Night in Paris had the task to heat them up with trendy pop and rock. The “NEUMANS” only let the band go after three encores.

Open Day in Wurzen

Anniversaries never rain but pour at NEUMAN & ESSER. Thus, Maschinenfabrik Wurzen also celebrated its 25th company anniversary as part of the NEA GROUP this year with an Open Day and celebration with the workforce. The course of the program in Wurzen was by no means outdone by the sister company’s at the headquarters.

Thousands of Saxonians were drawn to the company’s premises in order to gain an exciting insight into working life at the machine factory and to have fun with buffoonery and experiments as well as enjoying the cover band Die Eis Boys. On the stage, Lord Mayor Jörg Röglin and County Commissioner Henry Graichen addressed the Peters family with their words of thanks and referred to the importance of the company for further regional development.

As it is also a concern of the Peters family to engage itself socially in the region, the family used the anniversary to hand over a donation of 5,000 EUR to the sports club ATSV “Frisch auf”. The freshness continued in the evening in the festive marquee during the workforce celebration. In addition to the ceremonial speeches by Klaus Peters, Alexander Peters and Chairman of the Workers’ Council Frank Perner, the accolade of the jubilarians who have remained loyal to NEA for 25 years, was a highlight of the event.

Stefanie and Alexander Peters were delighted to congratulate each of the 29 jubilarians personally. Following the official program, the charming singer Telleen together with DJ Steffen knew how to keep the Wurzen colleagues and the delegations from Übach and Stassfurt on tenterhooks until the dancefloor was on fire. At daybreak, the “hard core” maintained with a deep sigh: “We won’t enjoy such a fantastic celebration again so soon!”

New Shaft Seal at the POWTECH

For the 4th time, STASSKOL exhibited at the POWTECH, international trade fair for powder and bulk solids technology. At the 3-day trade fair in Nuremberg, primarily shaft seals were in demand. Therefore, the experts from Stassfurt brought along the innovative shaft seal SDP500 in addition to proven standard seals.

This shaft seal was specially developed to seal mixers in vertical installations. Together with other sealing elements and buffer gas, the PTFE core lip seal hinders that powder or dust escape at the mixer’s drive shaft.

Regular customers and potential new customers showed active interest in the innovation. New contacts were made and even first orders written. A further reason for STASSKOL to return to the POWTECH 2017.

IREC: A Renowned Conference

As a kick-off to the 3rd International Rotating Equipment Conference IREC, the Peters family had invited the visitors of the 10th EFRC Conference – as one of the three forums – to the Welcome Reception.

Some 250 guests accepted the invitation to the lively Schlösser Bohème in order to drink a toast to the family’s 125th anniversary with Alexander Peters whilst enjoying snacks & beer. From Sept. 14 – 15, the NEUMAN & ESSER GROUP was presented as a double sponsor of the IREC with two booths, lectures and a team of 25 persons.

With some 750 professional visitors from 30 countries, were provided with a wide-ranging program consisting of 141 lectures on compressor, pump and vacuum technology. During the breaks, the visitors used the generous exhibition to obtain information regarding the latest product developments. The Technology Updates sessions enjoyed a large audience.

The conference sponsors placed their advertising messages for their products and companies there – for NEA and HOFER the best platform for the launch of their common “hybrid”. The video provides an overall impression on:

Preventive Health and Stress Management

The main topic of the Health Day in August at the German locations this year was preventive health and stress management. Therefore, individual preventive examinations and consultation constituted a large part of the program.

As always, kick-off was opened by Stefanie Peters with a healthy breakfast and plenty of suggestions. This was followed-up by interesting lectures, workshops and trial lessons, intended to sensitize the employees for different topics.

In the keynote speech “Better prevention and care“ by EAP-Assist, a closer look was taken at the topics of general powers of attorney and the redesign of living wills. Both sets of rules ensure that those affected, such as family members, are correspondingly prepared.

Not only were valuable tips provided after vein screening, but also following a heart check-up, during which also the personal stress index was determined, which showed who should take measures to “wind down” a little. The opportunity for this was provided in the “Power napping” workshop, which provided professional instructions for a short power break.

On the other hand, other employees found compensation in “Qi Gong”, a traditional art of movement in Chinese medicine, which promotes concentration capability and increases stress resistance. Many of the participants were so impressed by the trial lesson that they immediately registered their interest in an intensified course. On the other hand, in Staßfurt and Wurzen, a question was pursued which is both posed in working life and everyday life: “What happens to the body when you jump off the forklift or from a staircase?”

For this, the Employers’ Liability Insurance Association provided jump scales in order to visualize the individual forces and loads on the joints and to provide individual recommendations.

The annual event series since 2012 with its multitude of ideas and instructions once again demonstrated this year clearly what is important for a healthier life: the health of each and every employee is a matter close to the heart for the Peters family!

Apprentice Trip

The Apprentices Tour 2016 had highly interesting contents with its focus on guided company tours and the know-how transfer within this context. For this purpose, at the end of September the apprentices and trainers traveled from Übach-Palenberg to Leipzig with an intermediate stop at HOFER in Mülheim. Their new colleagues welcomed them there, and the busload of 50 was able to use the long bus journey to get to know each other. The newly made contacts were furthered during the course of the evening in the lively district in the vicinity of the “Barfußgässchen” in Leipzig.

After meeting the Wurzen and Stassfurt colleagues again on the next day, several guided company tours were on the agenda. Thus, the team, which in the meantime had grown to 95, was able to discover several innovations at STASSKOL when they were familiarized with the mill room, the 3D gauge arm and the hydraulic press with a press capacity of 630 tons.

The program was topped by a visit to the NEA supplier of many years’ standing EMDE Industrietechnik who provided a deep insight into model shaping, the casting of molded parts weighing several tons and in one of the largest NEA crankcase to everyone’s surprise. What an experience, these “physical elemental forces” when compared with the utmost precision of NEA machining mechanics!

Despite the “lively” night in a karaoke bar, the Wurzen apprentices presented their location and with it their workplaces to their young colleagues early next morning. They mastered that brilliantly. With a feeling of having gained thousands of impressions, everyone started the homewards journey and asked themselves: “Are we going to exceed the 100-person mark in 2017?”

NEA Engineers Meeting 2016

In September, Stefanie und Alexander Peters welcomed 30 employees from Germany, the USA, Brazil, Italy, Thailand and India for a one-week NEA Engineers Meeting in Übach-Palenberg, Germany. Karl Josef Kremers from NEA Deutschland, the organizer of this event, used the new open-plan office in order to prepare it for multimedia in accordance with his purpose.

The meeting was mainly concerned with the work processes and the question as to how the NEA GROUP will develop under the influence of the new CAD and SAP tools.

Within this context, the motto “Single Source of Truth”, which says that technical data on a drawing, order or dispatch list need only be entered once in the future was given particular attention. Rüdiger Schaaf and Mike Gorgas illustrated the data flow for it with the new software tools, most impressively, from creation of the drawing up to delivery.

The meeting was supplemented with further expert contributions by colleagues from international locations, but also from the headquarters. Thus, Franz-Josef-Ritzen also shed light on the compressor business markets and Andreas Hirschter several new areas of application. However, the highlight was the common trip to Mülheim. There, the new HOFER colleagues presented the product range, manufacturing as well as the innovative concept for the new hybrid.

The final conclusion: following the intense exchange, we are all looking forward to the SAP start at NEA Deutschland and NEA Mahl- und Sichtsysteme at the beginning of next year and also the colleagues far away from the headquarters are impatiently waiting for the “go-ahead” at their locations.

Strategy 2020

In 2015 Stefanie and Alexander Peters launched a structured process to develop Strategy 2020, involving all members of German senior management and the Managing Directors from the GROUP’s international subsidiaries. The individual goals and activities envisaged in this strategy for the three business segments of Compressor Technology (CT), Mechanical Processing Technology (MT) and Sealing Technology (ST) were then condensed into a single all-encompassing brochure.

Five primary strategic aims, each closely connected to the fundamental values of NEA GROUP, were formulated for each business unit. These include the flexibility to market requirements and a 360° quality of products and processes. The development of intelligent solutions, and the resulting product and process optimization, are intended to increase customer value even further. The primary aims have been broken down for the individual business segments and regions.

Both strategic and operative actions were devised to help achieve the objectives within the planned time frame. These were split into general and department-specific actions for each subsidiary, so that now a list of relevant measures that will help employees achieve the targets is available to every member of staff.

This year the goals and activities were reviewed for the first time across all business units and companies within the GROUP. Some measures have been completed, and new ones will follow – this is a rolling process, with a time frame of about five years envisaged. Every member of staff at NEA GROUP identifiying with and implementing the targets of Strategy 2020 is now of prime importance. The brochures set out in the appropriate local languages for our worldwide employees, along with regular updates are playing their part in achieving this.

100 Jubilarians Worldwide

40 Jahre Firmenzugehörigkeit NEUMAN & ESSER GmbH & Co. KG Maschinenfabrik

Gerda Heinen


As the networking trend in the world of work continues, even more traditional industries such as mechanical and plant engineering cannot help but embrace it. In this spirit, Managing Partners Stefanie and Alexander Peters organized a workshop to sensitize NEA’s senior management for “The Potential of Digitalization for NEA GROUP”.

Under the direction of the Institute for Industrial Management FIR, the one-day event featured a keynote speech and four subsequent workshops, run as a “World Café”. The open atmosphere inspired lively exchanges on the current status of the various business areas and their strengths and weaknesses.

This discussion not only helped to identify potential for development, it also revealed that, in terms of internal transparency and data networking, NEA already stands on a solid foundation. Three thematic blocks will now build on this basis to quickly create added value: the digital type plate, the NEA App, which will provide a handy calculation tool, and the Smart Services, all of which will be implemented with the help of partners.

It is no secret that networks and platforms help to explore and realize digital potentials through best practice examples and cooperation. NEUMAN & ESSER is therefore involved in the digitalHUB Aachen e.V. network, an association of 100 representatives from various industries, who all appreciate the importance of digitalization for their businesses. Founded in July, the digitalHUB brings together start-ups and mid-sized IT companies with potential clients for digital services in industry, commerce and science.

By providing practical support throughout the digitalization process and help with reviewing and developing business models, the association actively contributes to improving a company’s standing. As an easily-accessible meeting point for users and service providers, the HUB offers services from a digitalization checkup to launching joint innovation projects. It is now in the hands of everyone involved in the hub to make sure it picks up speed – there certainly is a market for it!

Data Security

The campaign to sensitize staff to data security has now been launched at all NEA sites worldwide. The leaflet that helped to get it off the ground, with its clear message and innovative flap mechanism, triggered a very positive response across the board.

Stefanie Peters and Thomas Kloke explained the aims and technical context of the campaign in detail to the staff in Germany. Using clear examples, they illustrated how easily users can fall prey to elaborate scams. One potential weak link is formed by social media platforms, which fraudsters target to harvest personal details about an employee’s life. This information is then used for “social engineering”, i.e. to send seemingly trustworthy emails from what appears to be a familiar sender. Whichever approach the fraudsters take, they all share the same goal: tapping sensitive company data for blackmail or other illegal purposes.

Thomas Kloke explained the technical precautions NEA GROUP takes, against hazardous malware, or ransomware. However, he emphasized that it is the individual PC user who forms the only effective firewall of last-resort, preventing viruses from infecting the company network. This means it is crucial for each and every employee to be aware of this responsibility and adjust their habits accordingly. The tips given on how to protect a computer proved valuable advice for all NEA users, and equally useful for private internet use.

From now on there will be regular updates on potential hazards and technical measures. The data theft market is rapidly evolving – keeping a watchful eye is the best way to face this challenge together.

Xiang Ling (Alan) Shi


■ Since November 2016: General Manager at NEUMAN & ESSER (Beijing) Co., Ltd.
■ Born on March 19, 1979, in Tianjin, China, married, one son

■ Bachelor of Mechanical Engineering & Automation at Beijing Information Science and Technology University

Professional Career:
■ Sales Director for Industrial Steam Turbine at Siemens Limited China
■ Head of Proposals for Turbo Compressor at Siemens Limited China
■ Technical Support & Project Manager at Triastoria Group
■ Project Engineer and Commissioning Engineer at SHC Globe Energy Ltd.
■ I&C Engineer at AT&M Co., Ltd.

■ Running, Basketball, Reading