Electrically actuated variable pressure control system

A method of controlling pressure and flow for application of an agrochemical from an agricultural spraying system, the method comprising:

• pumping an agrochemical from a tank through a pipe to an actuating valve including a nozzle and an actuator assembly, the nozzle having an orifice defined therethrough, the actuator assembly being configured to control an emission of the agrochemical from the orifice;
• regulating a predetermined flow rate of the agrochemical through the pipe by a regulating valve connected to the pipe;
• controlling the predetermined flow rate with a flow controller in communication with the regulating valve;
• sensing a pressure in the pipe using a pressure sensor connected to the pipe;
• and changing a flow resistance with a pressure controller based on the sensed pressure to maintain a predetermined pressure in the pipe, the pressure controller in communication with the pressure sensor, the pressure controller being configured to for the emission of the agrochemical from the orifice, the predetermined pressure dictated by the flow resistance.

A method for regulating pressure for application of an agrochemical from an agricultural spraying system, the method comprising:

• directing the agrochemical through a pipe of the agricultural spraying system to an actuating valve including a nozzle and an actuator assembly, the nozzle having an orifice defined therethrough, the actuator assembly being configured to control an emission of the agrochemical from the orifice;
• sensing a pressure in the pipe using a pressure sensor connected to the pipe;
• and
• adjusting a flow resistance associated with the agrochemical based on the sensed pressure to maintain a predetermined pressure in the pipe for emission of the agrochemical from the orifice,
• wherein the flow resistance is adjusted by continuously pulsing the actuator assembly according to a duty cycle.