The QB3 electro-pneumatic pressure regulator is designed for engineers and other manufacturing professionals looking for a single device that regulates pressure extremely accurately while handling high flows. The QB3 pressure control valve is a complete electronic pressure regulating package consisting of a pilot unit with two solenoid valves, closed loop electronic controls and an internal volume booster. The internal pressure transducer monitors the output pressure for closed-loop control and provides a monitor signal representing active pressure. The analog monitor signal is constantly compared against the command signal to achieve a desired set pressure. This compact package can be mounted in any orientation, but only vertical with full-scale pressures below 10 PSI, and is designed to be nearly immune to the rigors of the industrial environment. The QB3 boasts accuracy of between 0.25% and 0.5%, regulating pressures up to 150 PSIG or equivalent. The device will accommodate flow rates up to 30 SCFM.