Dry powder used for the reduction of hardness in boiler water systems.
Code : 123000 |
| 
(SDS)
Description
KEM – HARD is a highly soluble, dry powder product used for the reduction
of hardness in boilers. It will precipitate calcium hardness as a non – adherent sludge.
KEM HARD is characterized as a safe food additive in accordance with
U.S. regulations FDA (CFR code 173.310 Boiler Water Additives).
Advantages
Economical for use highly active phosphate based compound. Dissolves easily in water for dosing.
Eliminates scale problems due to calcium.
Maintains sludge in a non – adherent state for ease of blow down. Simple test to determine level of treatment.
Can be used for boilers of all pressures.
The alkalinity in the system is not influenced by KEM-HARD.
Usage
KEM – HARD is formulated to form a precipitate with calcium ions, which will not adhere to metal surfaces but are in a form suitable for blowdown.
Dosage
KEM – HARD is used in controlled amounts so that a free phosphate level is maintained in the boiler. This level is determined by the boiler pressure.
Initial dosage is 25-50 gr. per tonne of water and depends on the quality of feed water.
Dosing Method
For best results dose KEM – HARD directly to the boiler via the bypass pot – feeder.
The dry powder should be dissolved in hot water before adding into the boiler.
Ensure is fully dissolved before dosing.
Sample and testing
A representative sample of boiler water should be drawn for analysis daily. The sample should always be taken from the same point after blowdown, cooled and tested immediately.
Maintain phosphate level 10-50 PPM depending on the boiler pressure.
USE THE TABLE:
Select the section corresponding to the pressure of the boiler to be treated and read across the table to obtain the level of treatment required.
KEM HARD – DOSAGE – GRAMS/TONNE OF WATER
|
Pressure range |
Phosphate test result in ppm PO4 Standard
0-10 10-20 20-30 30-40 40-50 50 + |
Phosphate Initial Range (ppm) |
Initial Dose Gram/ tonne |
||||||
|
0-40 Bar 0-588 Psi |
Dose of kem hard grams per Tonne of water |
40 |
30 |
Satisfactory |
Satisfactory |
Satisfactory |
Blowdown |
20-50 |
50 |
|
41-60 Bar 603-880 Psi |
20 |
10 |
Satisfactory |
Blowdown |
Blowdown |
Blowdown |
15-30 |
30 |
|
|
> 60 Bar >880 Psi |
15 |
Satisfactory |
Satisfactory |
Blowdown |
Blowdown |
Blowdown |
10-25 |
25 |
|
These are recommended values based on experience and are in no way intended to replace the boiler manufacturer’s specifications or company regulations.