Mobile Phosphate Sludge


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WTPS20 utilizes phosphate chemistries to precipitate calcium and magnesium hardness as a mobile phosphate sludge.

WTPS20 is formulated with polymers and a dispersant that condition and mobilize the resultant phosphate sludge. Phosphate, Iron and silica sludges are then blown down from the boiler.

WTPS20 delays precipitation of hardness salts in feed lines. It may be injected continuously to feed water containing hardness salts without the formation of excessive scale in the pipe line.

WTPS20 incorporates alkalinity boosters. The product can be used in boilers up to 100 bar.

Product Data

Physical State Pale yellow liquid
Specific gravity (sg) 1.37
pH of product >13

Treatment and Dosing

A phosphate reserve is normally maintained within set limits in the boiler water. The correct treatment level depends on operating conditions such as boiler pressure and on the chemical characteristics of the water employed.

The treatment may be injected using a dosage pump or a dosage pot as appropriate to the particular installation. Its viscosity permits handling by conventional dosage pumps without dilution but it may be diluted if desired, using softened water or condensate. WTPS20 is not corrosive to steel mixing tanks or dosage pumps in concentrated or dilute form.  However, if dosed direct to hot boiler shells use a stainless steel injection fitting.


Please refer to material safety data sheet for detailed handling/storage instructions. 

  • Avoid contact with eyes, skin and clothing.
  • In case of contact, immediately remove contaminated clothing and wash skin with soap and water.
  • For eyes, flush with plenty of water and seek medical attention.
  • Harmful if swallowed.


WTPS20 treatments are shipped in 25 litre and 200 litre non-returnable drums.


More Information

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The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The company shall not be held liable for any damage resulting from handling, contact, mis-use or mis-application of the above product. In all instances the user should satisfy themselves that this product is suitable for the anticipated application and should carry out suitable and sufficient risk/COSHH assessments and a method of use statement.

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