MFP Low Pressure lube oil at 55# goes through which components before reaching bearings?

The pathway for low-pressure lube oil in a Main Feedwater Pump (MFP) system is critical for ensuring that the bearings receive clean, cooled oil to operate efficiently. The correct answer describes the process where the lube oil first passes through the cooler, then through the strainer, and finally heads to the supply header.

Starting with the cooler, this component lowers the temperature of the lube oil, which is important because high temperatures can negatively affect oil viscosity and lubrication properties. Keeping the oil at an optimal temperature helps maintain effective lubrication and minimizes wear on components.

After the cooler, the lube oil moves to the strainer. The strainer's role is to remove any particulate matter or debris that could cause damage to the bearings. This step is crucial, as clean oil is essential for preventing wear and ensuring the longevity of mechanical components.

Finally, the lube oil goes to the supply header, which distributes the oil to various bearings. This step ensures that all necessary components are adequately lubricated, facilitating smooth operation and minimizing the risk of overheating or damage.

Therefore, the sequence of cooling, filtering, and then distributing the lube oil is essential for maintaining the reliability and efficiency of the MFP and its components.