Boiler Water Treatment Chemicals

Hardness control
Phosphate treatment for boiler water hardness control

Description :

Liquid compound containing alkaline minerals salts sequestering agents. Oxygen scavengers and dispersants.

Product Description :

Hardness Control 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.

Directions of Use :

Hardness Control is formulated to form a precipitate with calcium ions which will not adherent to metal surfaces but are in a form suitable for blow down.

Dosage :

Hardness Control is used in controlled amounts so that a free phosphate level is maintained in the boiler. This level is determined by the boiler pressure (see table for normal levels). Initial dosage is dependent on the quality of feed water. To raise the phosphate level during normal operation, dose 23 grams per ton of distilled water to raise the phosphate level by 20 ppm P0

Dosing Method :

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 I 10 litres). Ensure that treatment is fully dissolved before dosing.

Sampling & Testing :

A representative sample of boiler water should be drawn for analysis daily. The sample should always be taken from the same point after blow down, cooled and tested immediately.

Follow the NOVA test kit instructions and log the results on the log sheets. These log sheets should be sent to NOVA for review and comments.

It is important that regular testing is carried out to ensure levels of treatment are correct.

For Dosage and Control Limits

USING 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.

Hardness control dosage - grams/ton

Pressure Range

Phosphate test result in p.pm.P04 Standard Range Initial dose Gram/ Ton
0-10 0-10 20-30 30-40 40-50 50+
0-40 Bar
0-588 Psi
23 11.5 Satisfactory -> Blowdown-> 20-50 23
41-60 Bar
603-880 Psi
17 5.5 Satisfactory-> Blowdown -> 15-30 17
 > 60 Bar
 > 897 Psi
Satisfactory->     Blowdown -> 10-25 17

These are recommended valves based on experience and are in no way intended to replace the boiler manufacturers specifications or company regulations.

Features, Benefits & Application :

* Highly active phosphate based compound, economical in use.

* Easily dissolved in water for dosing.

* Scale problems due to calcium are eliminated.

* Maintains sludge in non-adherent state for ease of blow down.

* Simple test to determine level of treatment.

* Can be used for boilers of all pressures.


Material Safety Data Sheet

1.Identification of the preparation:

Product name: HARDNESS CONTROL.
Safety sheet number: N. A.
Manufacturer: NOVA CHEMICALS, room.No.50, 4th floor, Paragji Vrindavan CHS, 20/24, old hanuman lane, MUMBAI-400 002

2.Composition / Information on ingredients:

Description: Concentrated Boiler Water Conditioner.
Composition: Proprietary Blend of Chelants.

3.First aid measures:

General recommendations: Product contaminated clothing should be removed immediately.
Inhalation: Escort patient to fresh air. If rapid recovery does not occur, obtain medical attention.
Contact with skin: Wash with water & soap.
Contact with eyes: Flush eye liberally with water. Obtain medical attention
Ingestion: Give a lot of water to drink. Obtain medical attention

4.Fire fighting measures:

Product is not flammable. In case of fire, all extinguishing media can be used. In case of fire, that might cause of the release of chemical product fire fighters should use protective clothing. Contaminated extinguishing water must be disposed off in accordance with local regulations.

5.Accidental release measure:

In case of leaks or spill avoid contact. Use personal protection Refer section 7.Prevent spillage from spreading by using sand, earth or other suitable material. Collect the spilled material in a closed container and remove to safe place for disposal by burning, large spills where material has come into the environment or sewer inform the local authority.

6.Handling and Storage:

Handling: Keep container closed and handle with care.
Technical measures: Maintain adequate ventilation, at a dry, cool place, keep away from acids.
Packing material: Polyethylene containers.

7.Exposure control / Personal protection:

Respiratory: Not normally required, invent of inhalation risk, wear respirator mask.
Eye: Chemical monogoggles recommended.
Skin: Standard issue work cloth, chemical resistant safety shoes or boots.

8.Physical and Chemical properties:

Appearance Dry Powder.
Colour Off-White.
PH N.E.
Boiling Point -
Freezing Point -
Viscosity N.E.
Specific Gravity N.E.
flash point None.
Solubility in water Soluble in Water.

9.Stability and Reactivity:

Stability: Stable.
Conditions to avoid: Keep away from Acids.
Dangerous reactions: None.

10.Toxological information:

Acute oral toxicity: Ingestion is very harmful.

11.Ecological information:

Do not allow undiluted product to enter sewer system or canals/rivers.

12.Disposal considerations:

Product and non cleaned containers should be disposed off in accordance to local environmental regulations.

13.Other information:

The information contained herein is based on the present state of our knowledge and does not therefore guarantee certain properties. Recipients of our product must take responsibility for observing existing laws and regulations.