Air-pressure controlled piston and valve configuration

A pressure regulator for regulating the flow of a liquid from a pressurized liquid source by selectively introducing a pressurized fluid from a pressurized fluid source into the pressure regulator to selectively move the pressure regulator between a closed position to an open position, the pressure regulator comprising:

• a. an inlet area;
• b. an outlet area;
• c. a liquid flow chamber fluidically connecting the inlet area and the outlet area, wherein the liquid flow chamber comprises a sealing port;
• d. a pressure chamber;
• e. a dividing panel positioned between the liquid flow chamber and the pressure chamber, wherein the dividing panel comprises an aperture;
• f. a piston comprising:
• i. a plate, wherein the plate is positioned on a first side of the dividing panel and inside of the pressure chamber, wherein the plate divides the pressure chamber into a first pressure chamber section and a second pressure chamber section, wherein a first surface of the plate is positioned inside the first pressure chamber and a second surface of the plate is positioned inside the second pressure chamber;
• and
• ii. a shaft, wherein the shaft extends through the aperture of the dividing panel and into the liquid flow chamber;
• g. a first fluid supply port fluidically connecting the first pressure chamber to the pressurized fluid source;
• and
• h. a second fluid supply port fluidically connecting the second pressure chamber to the pressurized fluid source;
• wherein when the pressure regulator is in the open position, the liquid is configured to flow from the pressurized liquid source into the liquid flow chamber through the inlet area and exit the liquid flow chamber through the outlet area and wherein when the pressure regulator is in the closed position, the shaft of the piston is configured to create a seal at the sealing port, thereby preventing flow through the pressure regulator.