What is the function of an overfill prevention device in a fuel tank?

The function of an overfill prevention device in a fuel tank is primarily to prevent spills during the filling process. This device is designed to automatically detect when the tank is nearing its maximum capacity and to stop the flow of fuel, thereby minimizing the risk of overflow and subsequent spills. Overflows can lead to environmental hazards, safety risks, and potential fines or legal issues, making this device crucial for safe fuel handling.

While measuring fuel levels, ventilating the tank, and enhancing fuel efficiency are important aspects of fuel tank management, they are not the main roles of an overfill prevention device. The device focuses specifically on safety during the fueling operation to ensure that the tank is not filled beyond its capacity, protecting both the environment and human health.