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| WHAT IS DEIONIZERS ? |
| HOW DOES REVERSE OSMOSIS DIFFER FROM A WATER FILTER ? |
| Ordinary water filters use a screen to separate only particles of dirt sediment from water. Reverse osmosis employs a semipermeable membrane that removes not only particles but also an extremely high percentage of dissolved contaminants-molecule by molecule- from raw tap water. |
| WHAT IS THE MEMBRANE AND HOW DOES IT WORK ? |
| The membrane consists of several thin layers or sheets of film that are bonded together and rolled in a spiral configuration around a plastic tub (This is also known as a thin film composite or TFC membrane.) The material of the membrane is semipermeable: it allows water molecules pass through while acting as a barrier to dissolved solids (i.e.: mineral chemical contaminants). When the feed water stream passes across the surface of the membrane, the PurePro molecules penetrate the membrane surface, working their way around the spiral and collecting in the center tube. The remaining contaminants are concentrated and washed from the surface of the membrane down the drain. |
| WHAT FACTORS AFFECT THE QUANTITY AND THE QUALITY OF THE WATER PRODUCED ? |
There are four major variables to consider:
- PRESSURE. The greater the water pressure, the better the quantity and quality of the water produced. Water pressure of 60 psi ideal. PurePro include one booster pump can make sure the water pressure.
- TEMPERATURE. 76*F is the ideal water temperature for R.O. 40*F water will cause the production of R.O. water to fall to half of that at 76*F. The maximum water temperature recommended is 85*F.
- TOTAL DISSOLVED SOLIDS (TDS). The higher the amount of dissolved contaminants in the water, the lower the quantity of water produced. A high level of TOTAL DISSOLVED SOLIDS can be overcome with additional water pressure.
- MEMBRANE. Different membranes have different characteristics. Some produce more water than others; some have better contaminant rejection capabilities; some have greater resistance to chemical abrasion for longer life. PurePro system include RE1812-70 The Thin Film Composite(TFC) membranes combine the best of these characteristics and are considered the finest membrane in the world.
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| PROCESS EXPLANATION ION EXCHANGE |
| Ion exchange is based on the principle of electro neutrality, that is, charged species are stable only when they exist as balanced pairs of positive and negative charges. Ion exchange resins, the materials used to carry out the process of ion exchange, are particles which contain fixed charges on their surface. To maintain electro neutrality, each of these charges has an ion of equal and opposite charge held to it; these ions are called counter ions. The counter ions are mobile and can leave the fixed charge if some other counter ion is available to replace it. The replacement ion must be of the same charge as the initial counter ion in order to maintain electro neutrality. The initial counter ion is established by washing the resin with a concentrated solution of the desired counter ion. For example, softener resins are cation exchangers containing carboxylic acids on their surfaces. If these resins are washed with strong NaCl solutions, the predominant cation solution is Na+ and it will become the counter ion. In use, the perfusing water will provide competing counter ions, such as Ca2+. Because of the preference of carboxylic acids for Ca2+ over the Na+ in dilute solutions, the water will be depleted of the Ca2+ in exchange for the Na+ initially present. |
