... Filtering area: 5.8M2 3: Filtering flow:200-250T/H Sand filter: shallow filter, no valve filter, high-speed filter, ... of filter media, but using quartz sand mainly .According to the filtering requirements ,quartz sand in 2 different of precision is ... H Filter ratingFilter media(12-40cm)Suggested flowBackwashing flowNormal filtrationquartz sand 0.7--0.9mm40-50m3/h33-55m3/hPolished filtrationquartz ...