Filter with screen fabric as an active filter element. Screen filters are made for a filtration grade up to a maximum of 25 μm, as the ratio of filter surface to free pore space is too unfavourable below this level (at 10 μm the pore space would only be approx. 4%) (Figure S 57).
![f62974c1f6d1e2e75842cf58795e83e42c83b798 0001_siebfilter.gif](/fileadmin/smc/files/f62974c1f6d1e2e75842cf58795e83e42c83b798.gif)
Figure S 57: Filter mesh