Chemical mix and delivery systems and methods thereof

A chemical delivery system, comprising:

• a main reservoir in fluid communication with one or more inlet fill valves, an inlet pressure valve, and a main reservoir outlet valve;
• a buffer reservoir in fluid communication with a buffer reservoir inlet valve and a buffer outlet valve;
• a line connecting the main reservoir outlet valve to the buffer reservoir inlet valve;
• a load cell for monitoring the weight of a chemical in the buffer reservoir and generating analog signals that are converted to digital signals indicative of the weight of the chemical in the buffer reservoir;
• a proportional valve block including a buffer control inlet valve and a buffer control outlet valve that adjusts the pressure to the buffer reservoir;
• a programmable logic controller receiving the digital signals and generating control signals to the proportional valve block to achieve a desired chemical flow rate.