At the Parts2Clean in Stuttgart (stand 3C69), Goudsmit Magnetics of Waalre, the Netherlands will introduce a recently developed magnetic filter that captures very tiny iron particles, as small as one micron, in industrial liquids such as lubricating oil, solvents and coolant. Removing iron particles from such products reduces damage to machines and tools, cuts machine downtime, and extends the life of both other filters present in the process and the industrial fluids themselves. The magnetic filter can be placed either before or after a candle filter: before to extend the service life of the candle filter, or after for separation of the finest iron particles (from 1 micron). The magnet is oriented parallel to the main flow, which means that filtering takes place continuously, without stopping the main flow. Unlike other filters, the newly developed magnetic filter requires no flushing fluid. Consequently there is very little loss of the original fluid and a very pure iron fraction.
Operation
The fluids are routed close to a powerful magnetic field. The better this contact is, the higher the separation yield. For cleaning, the flow to the filter is closed. Next the dynamic seal in the housing opens and the bar magnet is brought outside the product flow in its entirety. Then the seal closes again. The magnetic core in the bar magnet moves upwards. Because the seal is closed, the iron particles cannot move upwards with it. The magnetic field disappears and most of the iron particles fall off. To remove the remaining ferrous particles from the extractor tube the seal opens slightly and the extractor tube moves upwards. The seal now acts as a scraper. Once at the top, the seal closes. The magnetic core is back in its starting position and the supply can be opened.
The capacity of one unit is approximately 0.8 m3/h. The maximum pressure is 1.5 bar. It is a simple matter to place multiple units in parallel, which results in a proportional increase of the capacity. The magnetic filter itself can be used and cleaned indefinitely; only the sealing bellows will have to be replaced periodically.
