At what PSI does the pump relief valve reseat?

The pump relief valve reseats at 1325 PSI, which is crucial for maintaining optimal pressure within the fuel system of gas turbines. This specific pressure point is designed to ensure that excess fuel pressure does not exceed system tolerances, preventing potential damage or operational inefficiencies.

Understanding the reseating pressure helps operators and maintenance personnel recognize when a relief valve is functioning correctly. If the pressure rises above this threshold during operation, the valve opens to divert excess fuel back to the tank, ensuring that the main fuel system pressure remains stable. Once the pressure drops to 1325 PSI after some relief has occurred, the valve allows the system to return to normal operational conditions, promoting system reliability and safety.

This information is important for diagnosing pump and fuel system issues, as well as for understanding the operation of safety features designed to protect the gas turbine from fluctuations in fuel pressure.