Which type of fuel-booster pump includes a pressure relief valve?

The sliding vane pump includes a pressure relief valve, which is a critical feature for the safe and efficient operation of the fuel system. This type of pump operates by using sliding vanes that move within a cylindrical housing, allowing for a consistent flow of fuel regardless of the varying needs of the engine.

The presence of a pressure relief valve in a sliding vane pump is particularly important as it helps to regulate the pressure within the fuel system. If the pressure exceeds a predetermined level, the relief valve opens to divert excess fuel back to the tank or return line, thereby preventing potential damage from overpressure situations. This is essential in maintaining the integrity of the fuel system and ensuring reliable operation, especially during engine start-up and in varying operational conditions.

Other types of pumps, such as diaphragm pumps, gear pumps, and centrifugal pumps, have their own mechanisms for managing flow and pressure, but they do not inherently include a pressure relief valve as a standard component. Thus, identifying the sliding vane pump as the correct choice emphasizes the role of pressure management within aircraft fuel systems.