Combination valve for pressure building and final-line gas regulation

A valve for providing pressurized fluid to a pressurized-fluid consuming device, comprising:

• a body defining a first tank port and a second tank port configured to fluidly connect to a pressurized tank, an outlet port configured to fluidly connect to the pressurized-fluid consuming device, and a linking chamber fluidly connected to the second tank port;
• a pressure-build assembly comprising:
• a first piston at least partially defining a first fluid-pressure chamber that is fluidly connected to the first tank port;
• and
• a first plug operatively connected to the first piston, wherein the first fluid-pressure chamber is fluidly connected to the linking chamber when the first plug is in a first open position;
• and
• a final-line assembly comprising:
• a second piston at least partially defining a second fluid-pressure chamber that is fluidly connected to the outlet port;
• and
• a second plug operatively connected to the second piston, wherein the second fluid-pressure chamber is fluidly connected to the linking chamber when the second plug is in a second open position.