Description

Engine Water Treatment 9-108 – Nitrite-Based Cooling Water Protection

NALFLEET™ Engine Water Treatment 9-108 is a high-performance cooling water treatment formulated to protect diesel engines from corrosion, scale and sludge. It is effective in both hot and cold water systems and works in combination with glycol-based antifreeze. Because it contains a built-in anti-scalant, it helps keep heat transfer surfaces clean and efficient over long operating periods.

This product also supersedes older treatment solutions within the same category and is approved by all major diesel engine manufacturers.

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Features

• Contains a dispersant for cleaner cooling systems

• Does not affect gaskets or hoses

• Fully compatible with glycols used for frost protection

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Benefits

• Simple and reliable control testing

• Protects metals commonly found in marine engines

• Approved by major diesel engine manufacturers

• Certified for use in evaporators producing domestic water

• Gold-approved by CEFAS for use in UK and Dutch offshore industries

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Specifications

General

• IMO/EU Hazard Classification: C-7

Physical Properties

• Appearance: Light yellow

• Density: 1.3 g/ml

• Form: Liquid

• pH: 13.2 – 14.0

Documentation:

• (PDF) SDoC and MD for IHM

• (PDF) EWT 9-108 Dosage Guidance (2024)

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Directions for Use

NALFLEET™ EWT 9-108 protects cast iron, mild steel, copper, copper alloys, lead, solder and all other metals typically found in engine cooling systems.

Special guidance for aluminium components

• No aluminium present: Use Rocor NB Liquid or EWT 9-108

• With aluminium: Use Nalfleet 2000 or Cooltreat AL

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1. Preparation Before Dosing

1. Flush the system to remove sludge and particles.

2. If necessary, clean with Unitor™ Commissioning Cleaner to remove oil and grease.

3. Dose EWT 9-108 directly into the cooling system.

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2. Sampling and Testing

Weekly testing is essential.

• Use the WSS SpectraPak 309 Test Kit (739466).

• Take a representative sample and test immediately.

• Log results in Waterproof and report according to instructions.

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Dosing & Control

Nitrite Control Limits (as NO₂)

• Minimum: 670 ppm → dose 2.2 L/m³

• Recommended: 800 ppm → dose 2.7 L/m³

• Maximum: 1,000 ppm → dose 3.4 L/m³

Adjustment Rule

To increase nitrite by 100 ppm, add 0.3 L/m³.

Examples

New system (0 ppm):
→ Dose 2.7 L/m³ to reach 800 ppm.

Existing system (600 ppm):
→ Increase to 800 ppm:
200 ppm required = 0.6 L/m³ of EWT 9-108.

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General Notes

1. Always follow engine manufacturer requirements for water quality.

2. Keep chloride levels as low as possible – typically below 50 ppm.

3. Distilled water is recommended for system make-up.

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Levering i hele Norge

Ålesund Supply leverer NALFLEET™ Engine Water Treatment 9-108 til hele Norge – inkludert Oslo, Bergen, Trondheim, Stavanger, Kristiansand, Tromsø, Bodø, Drammen og Ålesund.