At what PSI does the pump relief valve crack open?

The pump relief valve is an essential component of a gas turbine system's fuel system, designed to maintain safe operational pressures by diverting excess fuel flow back to the supply tank if the system pressure exceeds a predetermined threshold. The cracking open pressure, set at approximately 1350 PSI, allows for the regulation of fuel pressure, ensuring that the fuel system operates within safe limits while maintaining optimal performance of the gas turbine. If the pressure were to exceed this value, the relief valve opens to prevent potential damage to components from over-pressurization, effectively protecting the integrity of the system.

This specific pressure setting is a crucial parameter in the design and functionality of the gas turbine's fuel system, as it helps maintain the necessary pressure conditions for efficient combustion while preventing the risk of failures due to excess pressure.