For optimum results dose Hardness Control direct to the boiler via the bypass pot-feeder. The dry powder should be dissolved in hot water (50°C) at a ratio of 1 part powder to twenty parts condensate (e.g. 500 grams/10 litres). Ensure that treatment is fully dissolved before dosing.
Dosage and control
|
|
Phophate test result in pPM PO4
|
|
|
Pressure
|
0 - 10
|
10 - 20
|
20 - 30
|
30 - 40
|
40 - 50
|
> 50
|
Control range
|
|
0-40 Bar
0-588 PSI
|
23
|
11.5
|
Satisfactory
|
Satisfactory
|
Blow Down
|
20-50
|
|
41-60 Bar
589-880 PSI
|
17
|
5.5
|
Satisfactory
|
Blow Down
|
Blow Down
|
15-30
|
|
> 60 Bar
> 880 PSI
|
5.5
|
Satisfactory
|
Satisfactory
|
Blow Down
|
Blow Down
|
10-25
|
Select row on righthand side for applicable pressure range. Compare test result with comment in table and dose stated amount of product per ton boiler water volume.
These are recommended values based on experience and are in no way intended to replace the boiler manufacturer's specifications or company regulations.