The saliva, spit or food particles that have flowed back into a drink after someone has drunk from it
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 of cleaning particulate matter out of the filter media by reversing the flow of water
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
The process of thoroughly cleaning the filter medium and/or elements by reversing the flow of water through the filter to waste
Reversing the flow of water through a filter to clean it of accumulated dirt and debris
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 process of cleaning the filter medium or septum by reversing the flow of water through the filter
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