This treatment dosed at 1.49 grams per ton of distilled water provides 1.0 ppm phosphate.
Feed Points: Dose with other BOILER CHEMICAL / alkaline liquid by diluting withcondensate and feed directly into the system drum (below the water level) using a bypass pot feeder. For low-pressure boilers, It may be dosed to the hotwell or condensate return tank, although this is not the preferred method.
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.