A fuel system for a turbomachine comprising: a fluid injection system, comprising: a primary injector; a secondary injector; a main flow line configured to pass injectant flow therethrough; a primary flow line connected to the main flow line and configured to provide a primary portion of the injectant flow from the main flow line to a primary injector; a primary flow valve disposed between the primary flow line and the main flow line and configured to allow injectant flow to the primary flow line from the main flow line in an open primary flow valve state, and to prevent injectant flow to the primary flow line from the main flow line in a closed primary flow valve state; a secondary flow line connected to the main flow line and configured to provide a secondary portion of the injectant flow from the main flow line to a secondary injector; a secondary flow valve disposed between the secondary flow line and the main flow line and configured to selectively allow injectant flow to the secondary flow line from the main flow line in an open secondary flow valve state, and to prevent injectant flow to the secondary flow line from the main flow line in a closed secondary flow valve state; a primary purge branch configured to be in fluid communication with the primary flow line in the closed primary flow valve state and to not be in fluid communication with the primary flow line in the open primary flow valve state; a secondary purge branch configured to be in fluid communication with the secondary flow line in the closed secondary flow valve state and to not be in fluid communication with the secondary flow line in the open secondary flow valve state, wherein the primary purge branch and the secondary purge branch are configured to be in fluid communication with a purge gas line to receive a purge gas flow from the purge gas line; and wherein the primary flow valve is a pressure actuated shuttle valve and is configured to transition from the closed primary flow valve state to the open primary flow valve state when pressure in the main flow line exceeds a pressure in the purge gas line such that the primary flow valve prevents fluid communication between the primary purge branch and the primary flow line when the pressure in the main flow line exceeds a pressure in the purge gas line; and wherein the secondary flow valve is a solenoid valve having an energized position and a de-energized position, and wherein the energized position corresponds to one of the open secondary flow valve state and closed secondary flow valve state the de-energized position corresponds to the other of the open secondary flow valve state and the closed secondary flow valve state. a primary injector; a secondary injector; a main flow line configured to pass injectant flow therethrough; a primary flow line connected to the main flow line and configured to provide a primary portion of the injectant flow from the main flow line to a primary injector; a primary flow valve disposed between the primary flow line and the main flow line and configured to allow injectant flow to the primary flow line from the main flow line in an open primary flow valve state, and to prevent injectant flow to the primary flow line from the main flow line in a closed primary flow valve state; a secondary flow line connected to the main flow line and configured to provide a secondary portion of the injectant flow from the main flow line to a secondary injector; a secondary flow valve disposed between the secondary flow line and the main flow line and configured to selectively allow injectant flow to the secondary flow line from the main flow line in an open secondary flow valve state, and to prevent injectant flow to the secondary flow line from the main flow line in a closed secondary flow valve state; a primary purge branch configured to be in fluid communication with the primary flow line in the closed primary flow valve state and to not be in fluid communication with the primary flow line in the open primary flow valve state; a secondary purge branch configured to be in fluid communication with the secondary flow line in the closed secondary flow valve state and to not be in fluid communication with the secondary flow line in the open secondary flow valve state, wherein the primary purge branch and the secondary purge branch are configured to be in fluid communication with a purge gas line to receive a purge gas flow from the purge gas line; and wherein the primary flow valve is a pressure actuated shuttle valve and is configured to transition from the closed primary flow valve state to the open primary flow valve state when pressure in the main flow line exceeds a pressure in the purge gas line such that the primary flow valve prevents fluid communication between the primary purge branch and the primary flow line when the pressure in the main flow line exceeds a pressure in the purge gas line; and wherein the secondary flow valve is a solenoid valve having an energized position and a de-energized position, and wherein the energized position corresponds to one of the open secondary flow valve state and closed secondary flow valve state the de-energized position corresponds to the other of the open secondary flow valve state and the closed secondary flow valve state.