Where Is It Coming from?
In a circulating oil system, water can enter in a variety of places. For instance, the reservoir headspace typically breathes into the environment. If a proper breather arrangement is not implemented or there are other breathing locations, humid air will condense in the headspace and water will drain into the oil. Pipe junctions and flanges can also allow ingression of water and other contaminants. Internal and external seals should be considered as well. These may include nearby steam joint leaks, leakage past seals and gland seams, heat exchangers, seal water zones, seals being washed down by high-pressure hoses, etc.