FILTER TYPE 2" AAF
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7.7 Cleaning Recommendations:
Cause for clogged Filtration Discs
:
Water-formed deposits may cause clogging of the Filtration discs. The formation of these deposits
depends on the quality of the water source and environmental conditions like temperature, pH, light,
duration of filtration and more.
Common water-formed deposits are:
•
Biological or organic deposits (mostly mucous or oily to the touch, beige, brown or green in color)
•
Iron oxide (rust) or other metal oxides
•
Carbonates (white or gray deposit)
•
Combinations of the above
If these deposits cannot be eliminated by pretreatment of the water, we recommend the following
cleaning procedure:
Material and Equipment:
•
A well-ventilated working place.
•
2 small containers (1 liter), 2 large containers (15 liter) and a stirring stick, all resistant to chemicals,
preferably of polypropylene.
•
Plastic rope to tie up the disc.
•
Sodium Hypochlorite NaOCl - Strong oxidizing liquid, commercial concentration: 10%. Oxidizes and
removes organic and biological deposits.
•
Hydrochloric Acid HCl - Very corrosive liquid, commercial concentration: 30%. Dissolves and removes
carbonates, iron oxide, and other deposits.
•
Safety equipment: safety glasses, gloves, long pants, long sleeved shirt and shoes.
ATTENTION !
While working with chemicals protect yourself with the necessary safety equipment:
•
Safety glasses, gloves, protective clothing
•
Work in a well-ventilated area
•
Follow the manufacturer’s instructions
Cleaning Organic and Biological Deposits
:
•
Open the filter and remove dirty discs.
•
Attention
–
Never open the filter before the pressure has been released.
•
Arrange the discs loosely on the plastic rope.
•
Prepare a 5% Sodium Hypochlorite solution: pour 5 liters of water into one of the large containers add 5
liters of Sodium Hypochlorite (10%) into the water.
•
Soak the discs in the solution so that both sides are covered. To achieve maximum cleaning, agitate the
discs several times with a stirring stick.
•
Contact time with cleaning solution: up to 8 hours.
•
Remove the discs carefully from the solution, put them in the second large container and rinse them
very well with clean water before placing them back in the filter.
•
The recommendation is to wash the cleaned discs again in the filter to ensure that all chemical residues
ware removed.
