Most oil-water separators are integrated with fuel filters.
The important function of the fuel water separator is to separate water from diesel fuel. The presence of water poses great harm to the fuel supply system of diesel engines, as rust, wear, jamming, and even deterioration of the combustion process of diesel can occur. Due to the high sulfur content in diesel, during combustion, it may even react with water to form sulfuric acid that corrodes engine components. The traditional method of water removal is mainly sedimentation, which is achieved through a funnel structure. At present, engines have higher requirements for water separation.
The diesel engine using a high-pressure common rail fuel injection system is equipped with a water accumulation sensor on the diesel filter. The circuits of the two water accumulation sensors are connected in parallel, and any one of them activated can turn on the water accumulation indicator light. If a circuit break occurs, there will be no warning of water accumulation on the instrument panel. The operator may not know if there is water accumulation, which may relax the inspection of water accumulation and easily lead to internal water accumulation and corrosion of the fuel injection pump.
In order to isolate moisture and dirt as much as possible, it is necessary to regularly maintain the fuel water separator according to the instructions and promptly remove any moisture from it.