Seawater Dispersant SWD

Where to use Sea Water Dispersant?

RXSOL Seawater Dispersant SWD is suitable for seawater cooling circuits used in marine and offshore equipment, including:

• Main engine seawater cooling systems

• Auxiliary engine cooling systems

• Central cooling systems

• Marine heat exchangers

• Seawater condensers

• Cooling-water pipelines

• Sea chests and associated cooling-water circuits

• Marine heat-transfer equipment

• Offshore seawater cooling systems

The product is intended primarily as a fouling-prevention/dispersant treatment. Existing heavy fouling should be mechanically or chemically removed before starting a preventive treatment program.

RXSOL Seawater dispersant SWD is a highly effective dispersant for keeping seawater cooling system free from marine fouling. Keeping seawater cooling systems free from microbiological (bacteria and fungi) or macrobiological (mussels, plants, etc.) growth is essential for maintaining the cooling capacity of today’s high efficiency systems. When used on a regular basis, RXSOL Seawater dispersant SWD prevents fouling by dispersing sea growth and preventing it from adhering to marine heat transfer equipment. RXSOL Seawater dispersant SWD does not contain any phenolics, chlorinated solvents or other harsh chemicals.

Recommended Dosage

The application procedure specifies:

Treatment concentration: 6 ppm
Treatment duration: 1 hour

For achieving approximately 6 ppm, the reference dosage is:

0.6 litre of product per 100 tonnes of seawater flow

The product can be introduced using a gravity head tank and flow meter, eductor dosing unit, or suitable pump-and-tank dosing system. The recommended injection point is immediately after the external sea-chest cooling-water strainer so that the product is properly dispersed throughout the seawater cooling circuit.

Recommended Treatment Frequency

Vessels operating continuously in coastal waters:

Dose approximately every 3 days.

Ocean-going vessels:
When operating in coastal waters, dose approximately every 2 days; when operating away from coastal waters, dose at least once per week.

Actual treatment frequency should be adjusted according to vessel operating conditions, seawater quality, fouling tendency and the vessel's water-treatment program.

It is recommended that the seawater cooling system be cleaned prior to beginning a prevention program featuring dispersant. The reason for cleaning is that if the cooling system is already fouled, the product will disperse new growth present but not existing growths.Therefore, to achieve the desired heat transfer condition,we recommend that all existing growth be removed.