Pressure control system and method for an agricultural planter

A planter system comprising:

• an inlet configured to receive a fluid at a supply pressure;
• a pump fluidly coupled to the inlet and configured to output the fluid to the inlet;
• at least one hydraulically driven component;
• a control valve assembly comprising one or more control valves, wherein the one or more control valves of the control valve assembly are configured to receive a first portion of the fluid, and the one or more control valves of the control valve assembly are configured to distribute the first portion of the fluid to the at least one hydraulically driven component at a demand pressure less than or substantially equal to the supply pressure;
• an unloading valve fluidly coupled to the inlet and to the one or more control valves of the control valve assembly, wherein the unloading valve is configured to separate the fluid from the inlet into the first portion and a remainder, to direct the first portion of the fluid to the one or more control valves of the control valve assembly at an unloading pressure less than or substantially equal to the supply pressure and greater than or substantially equal to the demand pressure, to receive the first portion of the fluid after circulation through the at least one hydraulically driven component, and to direct the remainder of the fluid to an outlet to bypass the one or more control valves of the control valve assembly;
• and
• the outlet configured to receive the first portion of the fluid from the one or more control valves and to receive the remainder of the fluid from the unloading valve.