Regardless of the glass type, finishing or subsequent application, compressed air is required at various stations in glass production for transport, shaping, cooling or control. Nothing must be allowed to clump, clog or contaminate in order to deliver the highest quality and ensure continuous long-term production. A production stop is a real problem for the furnaces with a heating phase lasting up to two weeks.
It is therefore particularly important that the compressed air used is oil-free, particle-free and dry in order to keep the production lines trouble-free. To ensure cost- and energy-efficient production, it is necessary to individually adapt the compressed air to the required requirements and ambient conditions.
With its standard sheets, the VDMA provides important information on compressed air quality for various industries. For the glass industry, it defines quality class 3 in terms of particle content, class 4 in terms of humidity (vaporous) at a temperature above 10°C, class 2-3 below 10°C, and class 2 in terms of total oil content. These classes apply to both control air (e.g. for pneumatic drives) and conveying air (e.g. for sorting cullet, batches or for cooling).
*Source VDMA standard sheet 4370