DAYLIFF SF, Инструкция по установке и эксплуатации, Страница: 5 / 16

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The combination of quality components, integrated design and assured Dayliff
quality ensures efficient and dependable softeners that can be relied upon to
give many years of trouble free operation
SOFTENER SIZING
Softeners are rated by their exchange capacity, which is the quantity of Calcium
that is removable between regenerations and is determined by the resin
performance and specified in gms CaCO . Equipment sizing is then computed
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on the basis of the raw water hardness and the required brine regeneration
period, 24hrs generally being the minimum. An example for sizing an SF600
unit is as follows:-
Exchange Capacity: If resin capacity is 75gms CaCO /litre*and resin
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volume 350litres, =75x350 = 26,250gms CaCO
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Softening Capacity: Assume water hardness = 300ppm CaCO =
3
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26,250/300 = 87.5m
Flow Rate: Assuming a 20hr operating period/day required flow rate =
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87.5/20 = 4.4m /hr, therefore SF 600 is suitable
Note that softening performance is reduced by increased TDS levels and it is
necessary to compute compensated hardness when TDS levels are greater than
400ppm as follows:-
Compensated Hardness (ppm CaCO ) =
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Measured Hardness ppmCaCO ) x 9 000
3 ,
9,000 - TDS level(ppm)
Operating Conditions
Raw Water Appearance : Clear
Iron : <0.1ppm
Residual Chlorine : <1ppm
Bacteria : Free
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Temperature Range : 5 C-40 C
Min Inlet Pressure: 1.7 Bar
Max Operating Pressure : (SF-H models) 10 Bar