proportional electro-pneumatic pressure regulator

Proportion-Air QB3 Pressure Control Valve Benefits High-Flow Applications

Jan. 2, 2024
The QB3 pressure control valve is a complete electronic pressure regulating package reliably designed for industrial applications.

The Proportion-Air QB3 proportional electropneumatic pressure regulator provides pressure regulation for high-flow applications in a single, compact unit. 

Key features of the QB3 include: 

  • monitoring output pressure for closed loop control
  • accuracy of 0.5%
  • ability to monitor flow rates up to 30 SCFM
  • compact package with flexible mounting options.

All-in-One Unit for Pressure Control

According to Proportion-Air, its QB3 pressure control valve is a complete electronic pressure regulating package in a single unit. It is comprised of a pilot unit with two solenoid valves, closed loop electronic controls and an internal volume booster. 

QB3 has an internal pressure transducer which montiors the output pressure for closed loop control and provides a monitor signal representing active pressure, the company explained in its press release announcing the launch of the pressure control valve. To achieve the desired pressure, the analog monitor signal is constantly compared against the command signal. 

Capable of regulating pressures up to 150 PSIG, the QB3 pressure control valve provides accuracy of 0.5%. The valve works with flow rates up to 30 SCFM, benefitting various high-flow applications. 

READ MORE: Integrating Analog Controls into Pneumatic Systems

Flexible Mounting and Customization to Suit Specific Application Requirements

The QB3 pressure control valve can be mounted in almost any orientation with the exception of full-scale pressures below 10 psi, then it must be mounted in a vertical orientation.

Manifold mounting the valve enables users to improve space efficiency by mounting it on a high-density space saving manifold. The company said all models of the valve can be manifold mounted including those for vacuum control, vacuum through positive pressure, absolute pressure, and standard gauge pressure. 

Several modifications can be made to the valve as well to help further customize it to application needs. Available options include customizable pressure ranges, manifold materials, command and monitor signals and many others.

The valve can also specify nearly any pressure unit of measure such as psi, bar, and inches of water column. 

READ MORE: A Primer on Pneumatic Pressure Regulators

About the Author

Sara Jensen | Technical Editor, Power & Motion

Sara Jensen is technical editor of Power & Motion, directing expanded coverage into the modern fluid power space, as well as mechatronic and smart technologies. She has over 15 years of publishing experience. Prior to Power & Motion she spent 11 years with a trade publication for engineers of heavy-duty equipment, the last 3 of which were as the editor and brand lead. Over the course of her time in the B2B industry, Sara has gained an extensive knowledge of various heavy-duty equipment industries — including construction, agriculture, mining and on-road trucks —along with the systems and market trends which impact them such as fluid power and electronic motion control technologies. 

You can follow Sara and Power & Motion via the following social media handles:

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