Automatic fueling system and method for hydraulic fracturing equipment

A mobile fuel filling system for simultaneously filling a plurality of receiver tanks at a work site, the system comprising:

• a fuel storage tank for feeding fuel into one or more receiver tanks;
• at least one charge pump in fuel communication with the fuel storage tank to draw the fuel out of the storage tank and circulating the drawn fuel into a fuel circulating loop at a predetermined pressure;
• at least one pressure control valve positioned in the fuel circulating loop to maintain the predetermined pressure;
• a plurality of openings in the fuel circulating loop as an arm extension, wherein each of the plurality of openings provides drainage of fuel into a fuel hose;
• an actuated valve coupled with each of the fuel hoses to automatically start or stop the flow of fuel in the corresponding fuel hose;
• a connecting end valve assembly connected at the end of the fuel hose that couples to an opening in a receiver tank;
• an in-line flow meter connected to each of the fuel hoses to measure a quantity of fuel flow through each fuel hose;
• a control chamber comprising a PID controller to control the operation of the pressure control valve and the actuated valve, wherein the PID controller opens or closes the pressure control valve to maintain the predetermined pressure, and opens or closes the actuated valve of any fuel hose after receiving feedback from the connecting end valve assembly;
• wherein the connecting end valve assembly comprises
• a mechanical float switch for shutting off fuel flow to prevent overfilling and spilling while supplying the fuel to the receiver tank;
• a machined stainless steel and aluminum valve head having multiple fuel exit holes particularly designed to let the fuel exit in multiple directions and volumes to avoid clogging inside the receiver tank;
• an analog level sensor to maintain desired fuel level in the receiving tank;
• and
• an airtight rubber locking mechanism to facilitate the connecting end valve assembly fitted tightly into the fuel inlet of the receiving tank and avoiding any leakage of fuel while fuel filling.