Water is considered 'hard' when it has excessive levels of calcium and magnesium dissolved in it. Hard water can lead to the following water problems:
Hard water can be treated using a distillation or reverse osmosis process. These processes are generally not used for softening purposes because of their relatively high capital and running costs. The most commonly used equipment for the treatment of hard water is an ion exchange water softener.
A water softener reduces hardness in water by removing the calcium and magnesium ions in the water, and replacing them with sodium ions, which do not lead to any form of scale build-up or precipitation.
A standard water softener consists of 2 vessels. The first vessel contains a sodium coated zeolite ion exchange resin. Water passes through the resin vessel under pressure, flowing over the softener resin, which attracts the calcium and magnesium ions to its surface, exchanging them for sodium ions.
Once the softener resin has reached the end of its service cycle and can hold no more calcium and magnesium, the water softener automatically starts a regeneration cycle, drawing a solution of brine from the second vessel, the brine tank, into the softener resin vessel. The brine solution washes the softener resin, causing the calcium and magnesium ions to be washed to drain, and the resin to be regenerated with sodium ions.
After a period of time (90-180 minutes, depending on the softener size and configuration), the resin vessel automatically rinses itself with clean water and switches back into service, ready to start softening water again. The system also automatically adds more water to the salt in the brine tank to produce more brine for the next regeneration cycle.
All water softeners supplied by CWC are fully automatic. The only operator assistance required is the addition of salt to the softener's brine tank occasionally.
|Model||Exchange Capacity||Inlet / Outlet Ports||Maximum flow (m2/hr)||Resin Tank Size|
|255-10||63 m³/°F||20 mm||0.4||6" x 35"|
|255-25||157 m³/°F||20 mm||1.0||8" x 47"|
|255-50||315 m³/°F||20 mm||2.0||10" x 54"|
|255-75||472 m³/°F||20 mm||3.0||13" x 54"|
|255-100||630 m³/°F||25 mm||4.0||14" x 65"|
|255-150||945 m³/°F||40 mm||6.0||18" x 65"|
|255-200||1260 m³/°F||40 mm||8.0||20" x 69"|
Operating pressure: 200-600 kPa
Vacuum: none. Tank warranty is void if subject to vacuum. Vacuum breakers are recommended with all fiberglass tanks.
Power supply: 220 VAC 50Hz
Temperature range (water temp): 5-35°C
Turbidity: 5.0 NTU max.
Chlorine: 1.0 mg/l max.
Iron: 5 mg/l max.
In order to accurately size a water softener for your residential, commercial or industrial application, we will need to know the following:
Your local approved CWC distributor can help you calculate your softened water needs, and can arrange for a professional water analysis to be taken. For more information about water softeners and how the water softening process can help you in your home or business, contact CWC today.