1 minute read
circuit
Components made of copper and zinc materials
The use of components made of copper and zinc materials in the fuel circuit is prohibited. They can cause chemical reactions in the fuel and thus lead to formation of a coating in the fuel system.
Requirements
Based on current knowledge, the following materials and coatings must not be used in a diesel fuel circuit because negative mutual reactions can occur even with approved coolant additives.
Metallic materials
• Zinc, also as surface protection • Zinc-based alloys • Copper • Copper-based alloys with the exception of CuNi10 and CuNi30 (seawater cooler) • Tin, also as surface protection • Magnesium-aluminum alloy
Non-metallic materials
• Elastomers: Nitrile rubber, natural rubber, chloroprene rubber, butyl rubber, EPDM • Silicon elastomer • Fluorosilicone elastomer • Polyurethane • Polyvinyl
Information:
In case of doubt about the use of materials on the engine and add-on components / components in coolant circuit, consultation with the respective MTU specialist department must be held.
