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Johnson Controls is the worldwide leading manufacturer of starter batteries for cars, among them VARTA. The required lead grids are manufactured at the VARTA factory in Hanover in fully automatic production lines.
These chads add up: About eleven tons have to be conveyed per hour. Up to now for the generation of the negative pressure required for vacuum conveying Johnson Controls used positive displacement blowers made in America. However, for Ahmad Abu-Shagra, these blowers are noisy, require comprehensive maintenance, susceptible to malfunctions and above all only comply with the German regulations after costintensive modifications. Therefore in 2010 when establishing a new production line for the factory in Hanover they decided for a positive displacement blower made by Aerzener Maschinenfabrik.
"A blower made in USA would have caused considerable modification costs in the drive- and safety area and additional expenditure for a reduction of the sound emissions. Therefore, after a costbenefit analysis for our new production line we used a new Delta Blower made by Aerzener", explains Abu-Shagra. As with the current "Generation 5" Aerzener Maschinenfabrik offers to the operator further advantages:
Easy operation and maintenance from the front side
Space-saving "side-byside" installation
Ventilation with acoustic hood by means of mechanical fan on the blower shaft without additional electric motor
Noise level reduced by about 6 to 8 dB(A) on the average.
No sound dampening adsorption material thanks to air deflections * ATEX-design optionally available
Wastes generated reach an intake pipe via a funnel and are returned to the melting process via a separator with rotary valve. Downstream of the separator now the Aerzen blower size GM 60 S has been installed for generation of the negative pressure. We bought it through Messrs. Georg Stein, specialist for pneumatic conveying based in Melle. Thanks to the uncomplicated construction of the blower its continuous monitoring is limited to the check of the negative pressure and the filter. The contact to Aerzener Maschinenfabrik was made via a colleague of Messrs. Johnson Controls, who had participated in a meeting concerning admission pressure compressors. The visit to the factory in Aerzen was followed by the visit to a reference plant of an operator."The smooth running of this unit, the visit to the production plants in Aerzen and the extremely careful assembly impressed us", assures Abu-Shagra.
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