Current Region: Global (EN)
Central vacuum systems provides a single source of vacuum in multi downstream entry points of a plant. Typical examples are the vacuum system used in hospitals (collection of the rubbish coming from the different departments) in big buildings vacuum cleaning systems, in plastic processing, paper processing and many other vacuum applications.
A very wide range of clean/dirty/heavy process fluids can be handled by means of centrifugal pumps. Also auxiliary service fluids (example water for cooling towers) are typically handled with centrifugal pumps.
To ensure safe processing, work pieces are automatically clamped to the processing table by means of suction heads. A stable and constant minimum vacuum must be generated to ensure that work pieces are held securely in place during mechanical processing.
In the pioneering age of pneumatic conveyance, demand was largely for transporting food stuffs such as grain and flour. Today, such installations are constructed for a wide variety of uses, such as transporting goods in dust particle form (flour, cement), solid bulk (pneumatic tube conveying systems) and mixed goods.
Before or after processing, wood must be protected against the destructive effects of environmental influences such as heat, moisture, insects and micro-organisms. The practice of soaking the wood in a preservative solution is widespread, but has the disadvantage that the liquid penetrates only a few millimetres into the wood. Complete protection is possible, however, if the wood is degassed and dried with the aid of a vacuum pump. The preservative agent then penetrates much deeper and optimizes the protective effect.
The use of vacuum dryers in conventional wood drying chambers can reduce a typical drying time from several weeks to a mere 3 to 4 days. During the drying process, pressure in the chamber is gradually reduced to the minimum. The chamber is pressurized with steam and the air is extracted to prevent cracks and colour changes in the wood that can be caused by too high an oxygen content. Rotary lobe blowers circulate the steam and convey the heat to the wood. Further steam condensate will be exhausted from the drying chamber.