We are still designing the robot and we plan to regulate the CO₂ before it goes into a accumulator tank

Hi, I am Clayton from the Van Wert robotics team and I need help finding a valve that I can use on our FRC robot that we will use to shoot t-shirts at ball games. We intend to have a bank of 7 or so barrels that will shoot individually. I need to find valves that can allow the CO₂ into the barrel fr...