Liquid sand filter

摘要: An upwash sand filter with a diaphragm hold-down for the granular media during stage is operable self-graded coarse-to-fine upflow filtration, downflow or combined up and down flow to central exit filtration. The held in place by that may be perforated plate allowing liquid pass through perforations, embodiment, column supported on another wall allow final lower layer of coarser used so itself not finest filter. In top employed this same purpose. serves all embodiments prevent loss avoid channeling thereby exceptionally high rates.