The QB4 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 nearly any orientation (exception: only vertical with full scale pressures below 10 PSI) and is nearly immune to the rigors of the industrial environment.
The QB4 boasts accuracy of 0.4%, regulating pressures up to 150 PSIG or equivalent. The device will accommodate flow rates up to 200 SCFM forward and exhaust. The QB4 high flow control valve also provides an electrical monitor signal for output to a panel meter or controller for data acquisition and/or quality assurance needs. The integrated volume booster does not have stamped gaskets, special molded diaphragm or seal parts. All parts related to normal maintenance are standard o-rings.
This versatile unit can be modified in numerous ways to meet the most demanding applications, like tire building. Options include customizable pressure ranges, manifold materials, command and monitor signals and more. Nearly any pressure unit of measure can be specified, including psi, bar and inches of water column, among many others. Options for vacuum control, vacuum through positive pressure, absolute pressure, and standard gauge pressure models are all available.
For more information on the QB4 and other accurate, repeatable and customizable proportional electro-pneumatic pressure and flow control products, visit proportionair.com.
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