| The chem-free iron filter features two major components, an air injector and a
backwashable filter containing special media. In some applications a contact
tank or an additional pressure tank may be required for the chem-free to
function.
The air injector adds a controlled amount of air to the water supply just before it
enters the pressure tank. The air starts the iron removal process as the water
sits in the tank.
The water’s pH is automatically raised to neutral or higher as it passes through
the filter bed and a catalytic effect occurs between the iron and filter media.
The iron actually changes into a colloidal state and as such it is trapped
throughout the filter bed. This produces an iron removal capacity four times
greater than a conventional iron removal filter.
The chem-free filter media remains unchanged at the end of the oxidation
process and consequently requires no chemical regeneration.
Periodic backwashing of the filter bed flushes the precipitated iron to the drain
and readies the filter for use again. The duration and frequency of backwashing
varies from 10 to 12 minutes every 4 to 12 days, depending on iron
concentration and water usage.
Once installed, the chemical free iron filter requires little
or no attention. It automatically removes soluble iron,
sometimes called ferrous iron or “clear water”,
precipitated iron, sometimes called ferric iron or “red
water” and bacterial iron. It is safe and very economical
because it requires none of the expensive or messy
chemicals conventional iron filters use.
Neutralizes acidic water
The chemical free iron removal filter’s patented process
raises the pH of the water, improving the efficiency of
iron removal. This has the added benefit of neutralizing
acidic water. |
