BIRM Series Filter
Installation Operation Maintenance Manual
BIRM WS1 NOV 2007 \page
4.0 REGENERATION/BACKWASH
4.1 The Backwash Process
The backwash process consists of two stages:-
Backwash - Water flows upwards through the media bed, and out to a drain.
As it does so it separates the deposits from the filter media and cleans off any
particles of dirt or pipework corrosion products, which may have accumulated
during the service cycle.
Fast Rinse - This follows the backwash cycle and entails rinsing away any
residual deposits from the media and re-packing the media bed. This is
carried out down flow with water flowing through the media in the direction of
service.
4.2 TIME CLOCK CONTROL OF REGENERATION INITIATION
Most filter application systems are supplied with a time clock
configuration valve, which initiate regeneration at a pre-set time (usually
2:00 AM) after a pre-set number of days. The frequency of regenerations is
fully adjustable, but a minimum of once every 3 days is recommended.
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