AERZEN Positive Displacement Blower in vacuum cleaning systems of EMDE Suction for safety Messrs. EMDE use AERZEN Positive Displacement Blowers in their vacuum cleaning systems – the ideal solution for the effective, efficient and safe cleaning of large units. Björn Redert, Sales of conveyor technique, EMDE: Vacuuming is the only correct and effective cleaning method. For producing the negative pressure in the vacuum cleaning systems, the low maintenance oil-free AERZEN Positive Displacement Blowers are optimal. The mobile vacuum cleaning system is designed for a maximum explosion pressure of ten bar (g). The system has a separate AERZEN positive displacement blower for the generation of com- pressed air installed in an acoustic hood.Dust deposits on machinery operating within closed buildings give rise to a significant risk of dust explosions.Only regular cleaning with a vacuum clean- ing system will ensure clean operations and a safe work environment. The blowing- off, as well as permanent sweeping, can calculate dust and increase the risk of a dust explosion. Convenient solution In large units and multi-story buildings, small mobile vacuum cleaning units are often difficult to handle. In such environments, a central pipe system, connected with a stationary or mobile vacuum clean- ing system, is much more suitable. A suction kit with flexible, electrically conductive suction hoses is regularly connected to this network via a spring-loaded flap valve. The vacuum cleaning system of Messrs. EMDE allows the removal of contaminants in several places at once. Moreover, the piping network can be ex- tended at any time, or else installed into a unit in an existing building. Its central unit consists of a separator with filter system and a positive displacement blower for producing negative pressure. This can be mounted on a chassis with StVZO-approval for mobile use, which is particularly suit- able in the operation of several separated suction systems where permanent clean- ing is not necessary. The filter separator separates the vacuumed-off product from the transport air. To protect the filter elements, and to avoid additional ignition sources, a magnetic separator is installed with a pull-out device, or pipe magnet, in the suction pipe. An oil-free differential pressure monitored positive displacement blower of low maintenance, type GM 35S, generates the negative pressure. It switches off automatically should it encounter a filter surface. The fully automated vacuum cleaning system is operated via an electrical control with SPS. Completely protected For the suction of explosive dust, the filter system can be designed in 10 bar (g) shock- proof design according to VDI 2263 DIN EN 1127-1, or alternatively in a pressure- reduced variant 1,5 bar (g) with relief valve. The piping network, as well as the positive displacement blower, are decoupled via corresponding protective devices. For the safe disposal of dust, which could cause dust explosions, there is dust- free return of the product into the material flow. In addition, EMDE has a closed system for discharge of the material.
Intelligent G5 logistics in South Africa Airgas Compressors, AERZEN’s South African subsidiary, has taken over the logistics for the import of Generation 5 on the African continent and developed an efficient concept for this:unlike the previous model that had been manufactured and assembled at site except for the stage, now, the G5 packaged units are imported as complete machines and are only partly assembled in South Africa. Thanks to this well thought- out transport and assembly concept, Airgas Compressors is able to serve its customers quickly and efficiently across Africa.
Replacement after 30 years In 1984, AERZEN supplied an oil-free screw com- pressor, type VRo 936L, to the Italian chemical company Versalis. This machine had been used in a process for the manufacture of polystyrene foam. Apart from periods when it was undergoing regular servicing, the compressor had been in continuous operation for 30 years!More than a quarter of a million operating hours had been reason enough for the customer to replace the machine with a new compressor stage from AERZEN. As a result, the course has been set for the future, in order to keep the work at this production plant running without any problems. The key challenge in the production of this compressor stage VR, which was delivered in January, was its tremendous weight: almost 34 tons!
The service fleet has a new look Our new brand positioning AERZEN also includes the service vehicles: the cars have so far been branded with the new logo and given a special white varnish paint treatment. For the transport of spare parts and tools for assembly work, the car boots have all been equipped with special vehicle floor-plates. With a view to the well-being of the service technicians who have to drive many thousands of kilometres every year, the service cars have been equipped with special health seats.
A helping hand is natural One of the most devastating fires in the history of Chile raged on 12th April in the mountains around Valparaiso and destroyed at least 2,500 houses. Also a colleague of Aerzen Chile was directly affected and lost his house in the disaster. “Team spirit and social commitment are among the basic values of AERZEN, therefore, for us as a team, we took it for granted that we must help our colleague”, Octavio Alarcón V., managing director Aerzen Chile, comments.The employees collected donations in kind, organised a new accommodation and helped with the cleaning up.A total of 11,000 people were made homeless as a result of the fire, another 6,000 had to be evacuated. 15 people died in the fire and 10 more were seriously injured.
Delta Blower in new E-Design Energy efficiency is a key issue today, especially in compressor technology, where energy costs amount to more than 90 percent of product life cycle costs (considered over a period of ten years). Now AERZEN has complemented its blower series Delta Blower Generation 5 with new design, characterised by top marks in terms of energy saving. The new E-Design uses up to four percent less energy, depending on volume flow and differential pressure. This improved energy efficiency is the result of numerous enhancements, such as a flow-optimised guide for the intake air in the acoustic hood and in the filter silencer. The patented intake cone minimises both pressure losses and sound input. Furthermore, the cooling system design has been revised. Instead of a mechanically driven acoustic hood fan, an electrical fan is now used, which ensures perfect ventilation at lowest power consumption. As with all AERZEN series, the E-Blower is also characterized by absolute reliability and longevity. It is a robust endurance runner in innumerable compression processes where air and neutral gases have to be conveyed oilfree. It is available in six sizes for intake volume flows from approximately 30 m3/h up to 1.000 m3/h and overpressures up to 1000 mbar resp. negative pressures up to 500 mbar.
Certifications for Emmerthal Emmerthaler Apparatebau, a subsidiary of AERZEN, is pleased about receiving three new certifications: the first of these came when, TÜV Nord granted certification for the integration of the working and health protection management system BS OHSAS 18001 into the existing quality management system DIN EN ISO 9001:2008 in October.Then, at the beginning of December, Emmerthaler Apparatebau received its China- Manufacturer-License for a further four years, with no deviations found during the audit. In January 2014, the Joint-Review and the extension to the U2-stamp followed, necessary for ASME- U-stamp for pressure vessels in higher pressure stages (>200 bar). Emmerthaler Apparatebau was also duly certified in this case.
New logistics concept The new AERZEN logistics centre is nearing completion. With the opening of the logistics centre, the trucks will follow a new route on the premises. The position of the entrance for trucks which deliver goods will be relocated from the entrance at the federal highway B1 to a new entrance at the street called Wiesenweg, including a new gatehouse.The planning for a high-performance high-bay storage facility, with a picking zone in front, to be situated next to the logistics centre, has started in parallel with the final building measures.With the new logistics concept AERZEN takes into account the permanent, worldwide growth of the company.
