Which component is primarily responsible for separating water from fuel in a Type 4 system?

The receiving filter separator is primarily responsible for separating water from fuel in a Type 4 system. This component operates by utilizing the differences in density between water and fuel. When the mixture enters the filter separator, water, being denser than fuel, settles at the bottom of the separator, allowing the cleaner fuel to rise to the top and flow out for further processing or use.

The filter element within the separator further aids in capturing any particulates that may be present in the fuel, ensuring that only clean fuel passes through to the next stages of the system. This separation not only protects the fuel system from potential damage caused by water but also enhances the quality of the fuel being delivered to engines or other equipment.

In contrast, the pressure relief valve regulates excess pressure in the system, the differential pressure control is more focused on maintaining optimal hydraulic conditions, and the receiving strainer is primarily designed to filter out larger contaminants rather than specifically separating water from fuel. Therefore, these components support different functions and do not fulfill the primary role of water separation, highlighting the significance of the receiving filter separator in a Type 4 system.