A fuel flow system for a gas turbine engine includes a fuel inlet to admit a flow of fuel into the fuel flow system and a fuel outlet to direct the flow of fuel to the gas turbine engine from the fuel flow system. One or more pumps are positioned along a fuel flow path connecting the fuel inlet to the fuel outlet. A metering valve is in flow communication with the one or more pumps to meter the flow of fuel. A minimum pressure shut-off valve is fluidly connected to the one or more pumps, and a shutoff apparatus configured to permit selective energizing to stop the flow of fuel from the fuel outlet without operation of the metering valve.