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Reverse Osmosis Water Filter from IWE Ltd

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Reverse Osmosis


Water Treatment Equipment – Reverse Osmosis

Reverse Osmosis is one of the most tested and consistent drinking water filtration methods known today for either home or business applications.

IWE have developed a complete range of RO water filters, developed, designed and manufactured at our Matlock branch in Derbyshire. With unbeatable recovery and efficiency we believe that our new range of RO drinking water filters are the most cost effective and efficient units on the market today. Our entire range features fully programmable controllers, 316 stainless steel frames and pipework, stainless inlet filters and stainless steel membrane housings and end caps. Better still, because we produce our units ‘in house’ we are able to customise any of our filters specifically to suit you, plastics can be changed to any colour you wish to suit your corporate brand, we can even add your company logo if required.

We hold the majority of our standard RO range in stock and are typically able to deliver an RO filter within 2/3 days from order. Should you wish to see our water filters in action please feel free to contact us. We are happy to invite you along to our premises and show you exactly how our reverse osmosis units operate and also provide training and advice on which filter would best suit your specific application.


The IWE Reverse Osmosis Range


The IWE compact is the smallest RO water filter in our range, with Permeate flow rate up to 150 l/ph. Featuring all the quality components of its bigger brothers in a smaller footprint. The compact RO comes fully factory tested and set up to your own specification. Simply connect the feed water to the ro unit and begin.

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Compact IBC

With the same RO filter as the compact unit the compact IBC has the addition of an IBC tank situated underneath the ro membranes. The compact IBC has proven to be a big hit with companies such as distilleries requiring clean water who typically leave the RO unit in production overnight and have 1000 ltrs of reverse osmosis water in the IBC on tap and ready to use the next day. The compact IBC features the addition of a high level switch situated within the tank which cuts water production when the tank is full.

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Pro Range

The IWE Pro reverse osmosis has 5 models within the range with flow rates from 300 to 1500 l/ph and 1 to 5 4040 stainless steel membrane housings. The complete range of IWE pro filters can be retro fitted with additional reverse osmosis membranes should you require larger flow rates in the future. Featuring all the same quality stainless steel components as all our other RO filters the Pro range also features the addition of Grundfos pumps across the entire range.

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Promax 4 Range

The IWE Promax 4 reverse osmosis water system has 4 models within the range with flow rates from 2000 to 3500 l/ph and 6 to 12 4040 stainless steel membrane housings. Like the Pro Range, the Promax can also be fitted with additional membrane housings should you require larger flow rates in the future. Featuring all the same quality stainless steel components as all our other RO filters the Promax 4 also utilises Grundfos pumps across the range.

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Promax 8 Range

The IWE Promax 8 is the largest in our RO range with 6 models to choose from it is ideally suited to any process requiring the production of large quantities of reverse osmosis water. The Promax 8 features flow rates from 4300 to a massive 12000 l/ph produced by up to 9 membrane elements. Like the Pro Range and the Promax 4, the Promax 8 can also be fitted with additional membrane housings if larger reverse osmosis production is required in the future. Featuring all the same quality stainless steel components as all our other RO filters the Promax 8 also uses Grundfos pumps across the range.

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Reverse Osmosis Information

Firstly to understand RO you must initially understand the concept of Osmosis.

The Official Dictionary term for Osmosis is “ a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one”.

Osmosis works on the basic rule of Homeostasis. Enough water will pass through a semi permeable membrane in order to create an equilibrium. One example of this is a balloon, eventually a balloon will deflate due to the pressure of the air inside the balloon pushing out. The air will eventually escape through the microscopic holes in the wall of the balloon to equalise the pressure on the inside of the balloon to meet the outside of the balloon.

Reverse osmosis works by the same rules with the addition of an applied positive pressure. This applied pressure prevents the natural state of homeostasis and forces through more particles that fit through the semi-permeable ro membranes leaving those particles that are too big behind. Once captured in the ro membrane, the contaminants can then be disposed of leaving behind drinking water in its purest form.

A grand scale example of ro is – A fishing net has holes in large enough to let water and smaller fish escape but small enough to capture fish of the required size.

What will an RO Water Filter Remove?

An RO system determines what it is going to reject based on the weight and their charge. Simplistically, an RO system will remove any molecules that are larger in size than a water molecule, thats approximately 0.0001 microns. An RO will also remove molecules with a higher molecule weight than 200. A water molecule has a weight of 18. The higher the charge of the contaminant, the more likely it is that the molecule will also be rejected and sent to waste.

In total a Reverse Osmosis Water Filter removes > 99.999% of all trace contaminants. Some of the drinking water molecules that are removed are Sodium, Calcium, Magnesium, Sulphates, Potassium, Nitrates, Iron, Mercury, Phosphate, Selenium, Lead, Arsenic, Magnesium, Nickel, Fluoride, Cadmium, Barium, Cyanide and Chloride to name a few!

An RO is also able to remove viruses and the smallest molecules of bacteria. Reverse Osmosis is now a well utilised technology within the treatment industry. In its infancy, the technology did come up against some criticism and disagreement amongst treatment professionals and industry experts. The product of RO has been referred to as ‘dead water’ due to the fact that all of the ‘good’ nutrients and minerals have been stripped away along with the other ‘bad’ contaminants. The World Health Organisation (WHO) Clarified that the majority of healthy minerals needed for the human body are sourced from food or dietary supplementary sources and not from drinking. To put it into context, to get the same amount of minerals as you would from a glass of orange juice, you would have to drink 30 gallons of tap water. Any claim that RO water is bad for you health or unfit for human consumption is usually wildly exaggerated. RO water is widely used in industry including pharmaceutical, food and beverage, metal finishing and boiler feed to name a few.