Reverse of a solution's flow through a system Often used as a cleansing mechanism in sand and dual media filters Backwashing cleans and resettles the filter bed
The process in which beds of filter or ion exchange media are subjected to flow opposite to the service direction to loosen the bed and to flush suspended matter (collected during the service run) to waste
The process in which beds of filter or ion exchange media are subjected to flow opposite to the service flow direction to loosen the bed and to flush suspended matter, collected during the service run, to waste
a means of cleaning which involves reversing the flow of water through the filter, forcing the water and dirt out a "waste" line This is done by setting the backwash valve to the backwash position NOTE: never adjust this valve when the pump is running!
A reverse flow of liquid to remove solids from the filter This backwash can be from an outside source, raw water or other fluids, from the filtrate or compressed air or even an inert gas ( for safety reasons )
the reversing of the flow of water through the filter and sending it to waste This procedure will thoroughly flush the filter, media and components Follow the manufacturer's instructions! Not all filters are routinely backwashed Sand filters should not be backwashed excessively: pay attention to the pressure gauge and vacuum whenever conditions indicate the need
(1) The seaward return of the water following the uprush of the waves Also called backrush or run down (2) Water of waves thrown back by an obstruction such as a ship, breakwater, cliff, etc
Reversing the flow of water through the filter to clean the elements and filter medium Typical part of maintenance for sand filters and some DE filters
the consequences of an event (especially a catastrophic event); "the aftermath of war"; "in the wake of the accident no one knew how many had been injured"
The backwash of an event or situation is an unpleasant situation that exists after it and as a result of it. the backwash of the events of 1989 = repercussions