backwash

Mixed bed units deliver an excellent treated water quality, but are complcated to regenerate, as the resins must first be separated by backwashing before regeneration.
Ces lits mélangés produisent une eau déminéralisée d'excellente qualité, mais ils sont compliqués à régénérer, car il faut séparer les résines par soulèvement avant la régénération.
Whatever the filter technology applied, reliable flow and pressure must be maintained by the pumps system for both feeding and backwashing the filters.
Quelle que soit la technologie du filtre, un débit et une pression fiables doivent être assurés par le système de pompage, aussi bien pour l'alimentation que pour le lavage à contre-courant des filtres.
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