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SKU RXSOL-40-4003-026 supports positioning this as a seawater-cooling dispersant for controlling marine fouling and maintaining heat-transfer performance.
RXSOL-40-4003-026 Seawater Dispersant SWD is a concentrated liquid dispersant designed for use in marine seawater cooling systems to help control marine fouling and prevent the adhesion of biological growth to seawater heat-transfer equipment.
Regular application helps disperse microbiological growth such as bacteria and fungi as well as macrobiological fouling such as mussels, plants and other marine growth, helping maintain seawater flow and heat-transfer efficiency.
Seawater dispersant 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 macro biological.
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.
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.
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.
Seawater dispersant may be dosed via a gravity head tank and flow-meter, an eductor dosing unit, or a suitable pump and tank system to a sea chest at the recommended concentration rate of 6 ppm for a period of one hour. To achieve 6 ppm, dose 0.6 liters of Seawater dispersant per 100 tons of water flow. Dosage should be for one hour. The best point for injection of the dilute solution of the product is immediately after the external sea chest COOLING WATER TREATMENT strainer. This provides total dispersion and mixing with the seawater. The mixed solution thus will contact all parts of the seawater cooling system.
Helps maintain the design heat-transfer performance of seawater cooling systems
Helps control marine fouling and biological growth
Helps prevent marine growth from adhering to heat-transfer equipment
Suitable for microbiological and macrobiological fouling control
Concentrated liquid formulation
Low-odor formulation
Neutral-pH product
Easy to apply through standard dosing equipment
Does not require continuous dosing and monitoring
Non-corrosive to most metals
Suitable for marine seawater cooling applications
Helps reduce the risk of heat-transfer degradation caused by fouling
Does not contain phenolics or chlorinated solvents
Seawater Dispersant SWD is a liquid marine-growth dispersant designed to help prevent marine organisms from adhering to surfaces inside seawater cooling systems.
The main purpose of SWD is to help keep seawater cooling systems free from microbiological and macrobiological growth, helping maintain efficient seawater flow, heat transfer and cooling capacity.
SWD is designed to disperse new microbiological and macrobiological growth that can develop inside seawater cooling systems.
No. SWD is a preventive treatment. It helps disperse new marine growth but does not remove established or existing fouling.
For systems with significant existing fouling, the cooling system should be properly cleaned before starting an SWD treatment program.
Because SWD is primarily a marine-growth preventative, existing deposits and fouling should be removed first. Starting treatment on a heavily fouled system may reduce the effectiveness of the preventive program.
Marine growth can restrict seawater passages and accumulate on heat-transfer surfaces. Regular SWD treatment helps control new biological growth, supporting proper seawater circulation and heat-transfer performance.
The reference application recommends dosing:
0.5 litres of SWD per 100 tonnes of seawater flow
The product should be introduced into the seawater cooling system for approximately one hour.
The product can be fed to the external sea chest using suitable dosing equipment such as:
Gravity tank with flow meter
Eductor dosing unit
Other suitable controlled dosing equipment
The recommended treatment period is approximately one hour.
Treatment frequency depends on the vessel's trading and operating conditions.
Vessels operating continuously in coastal waters:
Dose approximately every 3 days.
Ocean-going vessels:
Dose approximately once per week during ocean passage and approximately every 2 days when operating in coastal waters.
Coastal waters can have higher concentrations of marine organisms and biological activity. Therefore, seawater cooling systems may have a greater tendency toward marine growth, requiring more frequent preventive treatment.
No. SWD is a preventive dispersant, not a substitute for cleaning heavily fouled cooling systems.
Existing marine growth should be removed using an appropriate cleaning procedure before starting the preventive SWD program.
Yes. SWD is specifically intended for seawater cooling systems on marine vessels, where biological fouling can affect seawater flow and heat-transfer performance.
Regular treatment can help:
Prevent new marine growth from adhering to cooling-system surfaces
Control microbiological growth
Control macrobiological growth
Maintain seawater circulation
Support efficient heat transfer
Maintain cooling-system capacity
Reduce the tendency toward biological fouling
A typical treatment sequence is:
1. Clean the seawater cooling system if existing fouling is present.
2. Prepare the SWD dosing arrangement.
3. Calculate the required dosage based on seawater flow.
4. Dose at 0.5 L per 100 tonnes of seawater flow.
5. Introduce the product through the external sea chest.
6. Maintain dosing for approximately one hour.
7. Repeat treatment according to vessel operating/trading conditions.
The supplied application information recommends periodic dosing rather than continuous dosing. The treatment interval should be selected according to whether the vessel is operating in coastal or ocean-going conditions.
Existing fouling should first be removed through an appropriate cleaning procedure. SWD should then be introduced as a preventive treatment to help control subsequent marine growth.
SWD does not directly increase the designed cooling capacity of the equipment. Its role is to help maintain the system in a condition where seawater flow and heat-transfer performance are not unnecessarily reduced by new biological fouling.
The reference dosage is:
0.5 L per 100 tonnes of seawater flow for one hour.
Actual dosing should be confirmed against the current product TDS and vessel-specific seawater flow conditions.
| Vessel Operating Condition | Recommended Frequency |
|---|---|
| Continuous coastal operation | Every 3 days |
| Ocean-going operation | Once per week |
| Ocean-going vessel in coastal waters | Every 2 days |
The most important point is that SWD is a preventive marine-growth dispersant, not a heavy-duty fouling remover. Clean the cooling system first when existing fouling is present, then maintain regular preventive treatment.
Marine seawater cooling systems are continuously exposed to microorganisms and marine organisms. If biological growth attaches to heat-transfer surfaces, it can restrict seawater flow and reduce heat-transfer efficiency.
RXSOL Seawater Dispersant SWD works by dispersing marine growth and reducing its adhesion to seawater heat-transfer equipment. Regular treatment helps maintain cleaner heat-transfer surfaces and supports stable cooling performance.
If a seawater cooling system is already heavily fouled, the existing deposits and marine growth should be removed before beginning a preventive SWD treatment program.
Note that the dispersant is intended to prevent new growth and does not replace the cleaning required to remove established fouling.
Seawater Dispersant SWD should not be dosed while seawater is being drawn as make-up water for an evaporator or water maker.
The evaporator/water maker should be isolated or shut down during dosing and for at least 30 minutes after dosing.
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