Fiber filter medium SF series

for beerfor liquid food products and beverageshigh-efficiency

First-class raw materials and a mature technology for production are crucial for the quality of the SF filter sheets. The advantages high degree of safety economic and effective easy handling How it works Cellulose fibers form the basic structure of the filter layers. By the fibrillation of the cellulose fibers and the integration of highly porous diatoms, extremely filtration-active structures are built up which, if necessary, are loosened up by perlite or coarser diatomaceous earth. The composition and structure of deep-bed filters are therefore comparable to an extremely close-meshed, three-dimensional sieve with countless intersections. Particles and microorganisms are mechanically held back in the ever-narrowing pore labyrinth. As a result, the particles are deposited in the pores of the filter medium. 1 Surface filtration, sieve effect 2 Deep-bed filtration, mechanical absorption 3 Deep-bed filtration, adsorption, accumulation 4 Drain side, wet-solidified The deep-bed filtration effect can also be effective for particles that are smaller than the pores of the filter layer. That is why the filtration effect of filter layers is not indicated by specifying pore diameters, as is the case for membranes. Instead, the filtration capacity is characterized by specifying the water permeability at defined conditions. Three parameters are thus responsible for the retention capacity of filter layers: • Surface filtration or the mechanical sieve effect • Deep-bed filtration, mechanical absorption • The adsorption effect