Answer / Sanjay Sharma

To avoid metal contamination in filtered oil, a transformer oil filtration machine should have components made from materials that are resistant to oil and do not leach metals into the oil.nCommon materials for transformer oil filtration machines include:
1. Stainless Steel: A corrosion-resistant steel commonly used in construction.
2. Polypropylene (PP): A plastic that is compatible with mineral oil and can be used for filters, housings, and valves.
3. Polytetrafluoroethylene (PTFE): A high-performance plastic used for seals and gaskets due to its chemical inertness.

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