The polygonal screen basket ensures continuous turning of the material, which significantly improves the separation of impurities. A square strainer basket, as installed in the WIPA MD, offers a higher degree of cleaning compared to round strainer baskets. More corners mean more friction and therefore a better cleaning effect. Changing a screen has never been easier or more cost-effective than with the new screen design of the WIPA MD series. The screen elements are simple, inexpensive perforated plates that are screwed onto a skeleton. All panels have the same dimensions, which saves storage and spare parts costs, as the elements can be interchanged or simply replaced. To change the sieve elements, simply loosen the clamping elements that hold the sieves on the skeleton using 3-5 screws (depending on the size). In the feed area of the machine, the screening elements are subjected to greater stress than in the rear part of the machine, which results in higher and faster wear. Thanks to the identical dimensions of the screen plates in the front and rear part of the machine, the screen elements can be changed from front to rear. This saves on spare parts costs, as the screen plates can be used for longer. Separate sieve elements also allow the use of different sieve perforations. This means, for example, that a larger screen perforation can be installed in the infeed area of the machine than in the rear area of the machine. Screen elements with thicknesses of 2-12 mm are available. The screen perforation can be individually adapted to the material. Round perforations between 2 and 3 mm are used as standard. However, other screen types with e.g. conical or angular perforations, as well as special screen elements for e.g. the processing of fibers or big bags can be supplied. The new screen design offers a much larger screening surface than comparable systems, which significantly increases the separation, washing and drying results.