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R/O Water
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SIBE SWED-FOG® Pure Water Water that has been purified in the SIBE SWED-FOG® Pure Water Reverse Osmosis system is basically entirely free from lime and other minerals. If this water is used for air humidification, it will eliminate the problem of the fine dust that would be deposited in premises and ventilation ducts if untreated water were used for air humidification.

While eliminating the 'white dust', the SIBE SWED-FOG® Pure Water unit also reduces the amount of bacteria and viruses in the air by more than 99%. If this water is used for the SIBE SWED-FOG® DriSteem® range of steam humidifiers for demineralised water or for equivalent steam humidifiers of other makes, very accurate humidity control will be ensured and the operation of the humidifier will be virtually maintenance-free.

SIBE SWED-FOG® Pure Water is a highly environment-friendly water purification technique, since it uses no chemicals whatever. The SIBE SWED-FOG® Pure Water unit contains three filters to protect the membrane.

The first is an inlet strainer, which removes larger particles that could damage the membrane. A replaceable particle filter that reduces the amount of sand and rust flakes in the water follows this.

The third filter - which is also replaceable - contains activated carbon, which reduces the chlorine content as well as odours and tastes by adsorbing organic substances.

The SIBE SWED-FOG® Pure Water unit has very high water efficiency. The secret behind this is the patented circulation pump, which circulates water at a high flow rate and a high velocity along the surface of the membrane. Due to the water recirculation, the pure water produced can amount to around 80% of the incoming water.
What is pure water?
Pure water consists exclusively of H2O, i.e. a combination of the two elements of hydrogen and oxygen. In this leaflet, pure water describes the water quality, which means that the contents of bacteria, harmful substances and particles in the water are effectively reduced, and the water thus has a good taste, looks clear, does not smell and, above all, does not contain the lime and minerals that would cause dust if untreated cold water were used for air humidification.

The impurities are then automatically flushed away to keep the membrane clean, which substantially extends the useful life of the membrane.

The SIBE SWED-FOG® Pure Water unit features periodic automatic flushing designed to prevent capacity-reducing deposits on the membrane.

The SIBE SWED-FOG® Pure Water unit can be installed together with all units in the comprehensive SIBE SWED-FOG® range of air humidifiers. It can also be installed together with other air humidifier makes and types that are capable of withstanding demineralised water.

The SIBE SWED-FOG® Pure Water unit can be connected directly to a humidification plant, to an accumulator that distributes water to humidifiers, or to an unpressurized clean water tank with distribution pump for delivering water over longer distances or for compensating for large differences in head. To meet high water flow rate demands, several water purifiers can be connected to a humidification plant or plants.

The water quality obtained in the SIBE SWED-FOG® Pure Water unit is continually monitored and indicated by means lamps on the front panel. If the performance should deteriorate for any reason, the water purifier will be stopped and a warning lamp will light up. Lamps on the front panel also indicate when various filters must be changed. The SIBE SWED-FOG® Pure Water unit is also equipped with an automatic alarm and emergency stop function for the water purifier in the event of leakage.

What is Reverse Osmosis?
The phenomenon of osmosis was described in the 18th century. Water is purified and transported in Nature by osmosis, such as in the human body or in plants. Osmosis is of great importance in a living organism, where the cell walls serve as the membrane through which nutrients and metabolic products are transported. Reverse osmosis (RO) is the name given to osmosis used by technical means. By applying the contaminated liquid and raising its pressure, water is forced through a synthetic semi-permeable membrane, which, in practice, passes only water (water molecules). The great benefit of reverse osmosis is that no chemicals are used in the treatment process.
Examples of filtration efficiency of the
® Pure Water unit for various substances in water
turbidity >99
chloride >98
pigmentation >99
nitrate/nitrite >97
Cations/Metals   sulphate >97
sodium >96
potassium >97
octane, decane, heptane etc >98
calcium (total hardness) >99
benzene, toulene, xylene, ethyl >99
aluminium >99
diesel oil >99
iron >99
Polyaromatic hydrocarbons  
manganese >99
PAH >99
Cations/Heavy metals   Chlorinated hydrocarbons  
copper >99
halomethanes, haloethanes, haloethenes etc. >99
lead >99
Trihalomethanes (THM)  
zinc >99
trichloromethane >60
mercury >99
cadmium >99
chromium >98
PCBs >99
nickel >99
Anions   bacteria and viruses >99
fluoride >99
N.B. The values for the inorganic substances have been measured in a water sample taken after 2 minutes of operation at a flow of 4.4 litres per minute, 80% water efficiency and using test water with a salt content of 800 mg per litre and at a temperature of 20oC.

Analysis laboratory: VVL Stockholm, Sweden. The values for the organic substances have been measured in a water sample taken after 2 minutes of operation at a flow of 2.8 litres per minute, 80% water efficiency and using test water to which the relevant substance has been added to a concentration which is 100 times higher than the lowest detectable content at 10oC.

Analysis laboratory: AnalyCen, Lidköping, Sweden. Microbiological investigation has been carried out under a variety of operating conditions using test water containing a very high number of micro-organisms. Water samples were taken weekly after 20 and 40 seconds and after 1, 2, 6, 12 and 18 minutes of operation. Investigating laboratory: SVELAB, Jönköping, Sweden.
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AB SIBE International, Mamrevägen 3-5, 163 43 Spånga, Stockholm, 08-564 849 50,