Seawater Dispersant SWD
Seawater cooling dispersant for controlling marine fouling and maintaining heat-transfer performance. Keeping seawater cooling system free from marine fouling free from microbiological bacteria and fungi or macro biological.
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
Seawater Dispersant SWD for Marine Cooling Systems
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.
Where to use Sea Water Dispersant?
RXSOL Seawater Dispersant SWD is suitable for seawater cooling circuits used in marine and offshore equipment, including:
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Main engine seawater cooling systems
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Auxiliary engine cooling systems
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Central cooling systems
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Marine heat exchangers
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Seawater condensers
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Cooling-water pipelines
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Sea chests and associated cooling-water circuits
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Marine heat-transfer equipment
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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.
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.
Product Benefits
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Helps maintain the design heat-transfer performance of seawater cooling systems
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Helps control marine fouling and biological growth
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Helps prevent marine growth from adhering to heat-transfer equipment
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Suitable for microbiological and macrobiological fouling control
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Concentrated liquid formulation
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Low-odor formulation
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Neutral-pH product
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Easy to apply through standard dosing equipment
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Does not require continuous dosing and monitoring
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Non-corrosive to most metals
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Suitable for marine seawater cooling applications
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Helps reduce the risk of heat-transfer degradation caused by fouling
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Does not contain phenolics or chlorinated solvents
Typical Technical Specifications
| Property | Typical Value |
|---|---|
| Product Name | Seawater Dispersant SWD |
| RXSOL SKU | RXSOL-40-4003-026 |
| Physical Form | Liquid |
| Appearance | Clear, water-white liquid |
| Odor | Fresh, pleasant odor |
| Specific Gravity @ 25°C | 0.989 |
| Flash Point (PMCC) | None |
| pH | 7.0-8.5 |
| Water Solubility | Complete in all proportions |
| Recommended Treatment Concentration | 6 ppm |
| Typical Treatment Duration | 1 hour |
RXSOL Marine maintains Material Safety Data Sheets on all of its products. Material Safety Data Sheets contain health and safety information for your development of appropriate product handling procedures to protect your employees. Our Material Safety Data Sheets should be read and understood by all of your supervisory personnel and employees before using Drew Marine products.
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Suitable for Marine Maintenance Programs
RXSOL-40-4003-026 Seawater Dispersant SWD can be incorporated into preventive maintenance programs for vessels where seawater cooling systems are exposed to persistent marine fouling.
Maintaining clean seawater cooling passages helps support:
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Stable seawater flow
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Effective heat transfer
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Cooling-system performance
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Reduced biological fouling
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Reliable operation of marine heat-transfer equipment
Product Queries
What is RXSOL Seawater Dispersant SWD?
It is a concentrated liquid dispersant designed to help control biological and marine fouling in seawater cooling systems.
What does SWD remove?
SWD is primarily a dispersant and fouling-prevention treatment, rather than a heavy-duty cleaner. It helps disperse marine growth and prevent new growth from adhering to heat-transfer equipment.
Does SWD control bacteria and fungi?
Its application for controlling microbiological growth such as bacteria and fungi, as well as macrobiological growth such as mussels and plants.
Does SWD remove existing heavy fouling?
Not as a substitute for a dedicated cleaning operation. Existing heavy fouling should be removed before beginning a preventive SWD treatment program.
What is the standard SWD dosage?
The reference dosage is 6 ppm for one hour, equivalent to approximately 0.6 litre per 100 tonnes of seawater flow.
Where should SWD be injected?
The reference procedure recommends injection immediately after the external sea-chest cooling-water strainer to promote dispersion and mixing throughout the seawater cooling system.
Can SWD be used continuously?
Does not require continuous application. It provides periodic dosing recommendations based on whether the vessel is operating in coastal or ocean-going conditions.
Is SWD suitable for marine heat exchangers?
Yes. Its intended application is seawater cooling systems and marine heat-transfer equipment where biological fouling can affect cooling performance.
What is the pH of SWD?
The typical pH is 7.0-8.5, according to the reference technical data.
Is SWD water soluble?
Yes. The product is completely soluble in water.
Is SWD corrosive?
The product as non-corrosive to most metals. Material compatibility should nevertheless be confirmed for the specific cooling system and operating conditions.
What safety precautions should be followed?
Appropriate personal protective equipment should be worn when handling and dosing the product. Personnel should read the current RXSOL SDS before use and follow the vessel's chemical-handling procedures.
Product Identification
Brand: RXSOL
Product: Seawater Dispersant SWD
SKU: RXSOL-40-4003-026
Category: Sewage Chemicals Treatment-40 / Marine Water Treatment
Application: Seawater Cooling System Fouling Control
Primary Function: Marine Growth Dispersant & Fouling Prevention
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Seawater Dispersant SWD manufacturer supplier distributor in Mumbai, Kandla, Kolkata, Vizag, Chennai, India, Fujairah, Dubai, Sharjah, UAE, Gulf, Middle East, Muscat Barka Oman, Kenya Africa. Get the best quality of Seawater Dispersant SWD at a competitive price from us. We have ready stock of Seawater Dispersant SWD in India, UAE Gulf, Oman, Kenya Africa. Contact us for bulk as well as small orders.
Seawater Dispersant SWD – Frequently Asked Questions
1. What is Seawater Dispersant SWD?
Seawater Dispersant SWD is a liquid marine-growth dispersant designed to help prevent marine organisms from adhering to surfaces inside seawater cooling systems.
2. What is the main purpose of SWD?
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.
3. What types of marine growth does SWD help control?
SWD is designed to disperse new microbiological and macrobiological growth that can develop inside seawater cooling systems.
4. Does SWD remove existing marine growth?
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.
5. Why should the seawater cooling system be cleaned before using SWD?
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.
6. How does SWD help maintain cooling efficiency?
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.
7. How should SWD be dosed?
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.
8. Where should SWD be introduced?
The product can be fed to the external sea chest using suitable dosing equipment such as:
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Gravity tank with flow meter
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Eductor dosing unit
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Other suitable controlled dosing equipment
9. How long should each SWD treatment last?
The recommended treatment period is approximately one hour.
10. How frequently should SWD be dosed?
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.
11. Why is more frequent dosing recommended 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.
12. Can SWD be used as a replacement for mechanical cleaning?
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.
13. Is SWD suitable for marine seawater cooling systems?
Yes. SWD is specifically intended for seawater cooling systems on marine vessels, where biological fouling can affect seawater flow and heat-transfer performance.
14. What are the key benefits of regular SWD treatment?
Regular treatment can help:
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Prevent new marine growth from adhering to cooling-system surfaces
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Control microbiological growth
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Control macrobiological growth
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Maintain seawater circulation
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Support efficient heat transfer
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Maintain cooling-system capacity
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Reduce the tendency toward biological fouling
15. What is the basic SWD treatment procedure?
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.
16. Is continuous dosing required?
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.
17. What happens if the cooling system already has heavy marine fouling?
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.
18. Can SWD improve the cooling capacity of a vessel?
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.
19. What is the recommended dosage of SWD?
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.
20. What is the recommended dosing frequency?
| 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 |
21. What is the most important point to remember when using SWD?
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.
How Seawater Dispersant SWD Works
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.
Pre-Cleaning Requirement
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.
Important Application Precaution
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.
