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RO-Reverse osmosis filter
Reverse osmosis
Semi-permeable membrane
Concentrated
solution
Pure water
Osmotic pres-
sure
Osmosis
Reverse osmosis membrane
Reverse osmosis
Concentrated
solution
Pure water
Pressure
2.1. Function of reverse osmosis
When separating saline solution from pure water by a semi-permeable membrane, the system tries
to establish concentration compensation.
The water passes through the membrane without the influence of external forces and dilutes the
solution until a balance is established. This process is called osmosis.
In the balance, the static pressure in the solution is the same as the osmotic pressure.
The process is reversible when applying pressure to the saline solution, thus overcoming the
osmotic pressure. During this process of reverse osmosis, pure water is transported through the
membrane, while the saline solution is concentrated.
In the technical reverse osmosis process, the concentrated solution is referred to as concentrate,
which is continuously drained from the system and which produces pure water permeate. Thus,
when speaking about performance, permeate output or pure water output is indicated.
2.2. Capacity of the carbon pre-filter (RO60S)/combi-pre-filter
(RO60C)
•
The capacity of the special carbon pre-filter depends on the chlorine content of the water.
•
At 2ppm of chlorine and an assumed working day of 6 hours and 5 days a week, this capacity
would last:
•
RO60S:
approx. 100 000 litres of water = approx. 200 working hours or approx. 40 working days or
approx. 2 months
•
RO60C: approx. 76.000 litres of water = approx. 150 working hours or approx. 30 working days or
approx. 1,5 months
You can use ph-test stripes to test the chlorine level of the water. To check if
the pre-filter works correct, test the water at the concentrate outlet on the
back of the filter. If the value is above 0 ppm, you have to exchange the pre-
filter.
Summary of Contents for RO60C
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