54 HARDNESS/PHOSPHATE CONTROL
Uses:
- This product is a dry powder product used for hardness reduction and phosphate control in boiling water systems
- Eliminates calcium scale problems
- Phosphate levels are optimised
- Hardness salt forms are easily removed by blowdown
- Can be used in all boiler water systems
This product is formulated to give an optimum phosphate level within boiler water systems. This ensures correct hardness levels at all times.
Dose
A representative sample of boiler water must be regularly obtained and tested for phosphate levels. The use of impure feed water will influence phosphate demand.
The powder should be dissolved in warm water (5OdegC) at a ratio of 1 part to 20 parts water and then fed into the boiler system by a by-pass feeder.
Phosphate Dosage Chart kg/lOt Boiler Water Capacity |
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| Phosphate Test ppm | Initial dose | 0-10 | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 | 60-80 | 80-100 |
| Water Tube Boiler | 0.65 | 0.6 | 0.5 | 0.4 | 0.3 | 0.2 | No dose | No dose | Blow-down |
| Double primary | 0.45 | 0.4 | 0.3 | 0.2 | <-- | -No | dose | --> | Blow-down |
| Pressure boiler secondary | 0.65 | 0.6 | 0.5 | 0.4 | 0.3 | 0.2 | No dose | No dose | Blow-down |
| Exhaust gas Distilled Water | 0.35 | 0.2 | <-- | --- | -No | dose | --- | --> | Blow-down |
| Economiser shore water | 0.55 | 0.5 | 0.4 | 0.3 | 0.2 | No dose | No dose | Blow-down | |
| Boiler pressure 40-60 kg/cm2 (570-854 psi) |
0.37 | 0.27 | 0.17 | Satis-factory No dose |
Satis-factory No dose |
High No dose |
Too high Blow-down |
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| Boiler pressure 60-68 kg/cm2 (854-966 psi) |
0.37 | 0.27 | 0.1 | High No dose |
High No dose |
High No dose |
Too high Blow-down |
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These are recommended limits for levels of treatment. They are not intended to replace either shipping company instruction or boiler manufacturer's policy.