Proportion Air Proportion Air

Electronic Pressure Regulators

Equilibar is proud to represent electronic pressure regulators by Proportion-Air, an innovative leader in precision elecronic pressure control.

100% designed and manufactured in the USA, Proportion-Air is able to quickly customize pressure controllers for virtually any application.

Also called electro-pneumatic, I/P, or E/P regulators, these devices can be used to easily control pressure in a process based on an automated signal from a PLC or process computer. They use two servo valves (a 'push' valve and a 'vent' valve) to precisely control pressure as measured by an internal or external pressure sensor. (Learn how electronic pressure regulators work)

Proportion-Air pioneered the use of proportional valve modulation to minimize pressure oscillations in precision applications. The MPV/QPV regulators are ideal for controlling Equilibar's precision back pressure and vacuum regulators.

When purchased through Equilibar for this purpose, these MPV/QVP regulators are specially tuned for high performance right out of the box, saving you time on system set-up and tuning.

Ultra Precision / Low Flow Regulators (QPV / MPV Series)
Proportion Air Ultra Precision/Low Flow Regulators

QPV Series

  • Aluminum IP65 enclosure
  • Optional digital display (shown)
  • 4-20 mA or 0-10 VDC

QPV1: uses internal press. sensor
QPV2: uses external press. sensor

QPV/MPV Brochure
  • Min range: 0-0.3 psig, vacuum
  • Max range: 0-150 psig
  • Superior proportional valve action
  • Accuracy: 0.1% - 0.5% FS
  • Resolution: 0.005% - 0.2% FS
  • Lowest available pressure range in class
  • Low flow (ideal for providing set-point signal)
  • Optional DeviceNet / Serial communication
  • For air and inert gases

Ideal set-point regulators for the Equilibar back pressure regulator

Proportion Air Ultra Precision/Low Flow Regulators

MPV Series

  • Same internals as QVP Series
  • 0-10 VDC command input
  • Card, panel, or DIN rail mounting

MPV1: uses internal press. sensor
MPV2: uses external press. sensor

QPV/MPV Brochure


Precision Electronic Pressure Regulators
Proportion Air Ultra Precision/Low Flow Regulators

QB Series

  • Aluminum IP65 enclosure
  • Optional digital display (shown)
  • 4-20 mA or 0-10 VDC

QB1: uses internal press. sensor
QB2: uses external press. sensor

QBe
  • Min range: vacuum; 0-1 psig
  • Max range: , 0 -500 psig
  • Precision electronic pressure regulator
  • 0.2 to 0.5% FS accuracy
  • Good for most applications
  • Works well as set-point regulator for Equilibar back pressure regulator
  • For air and inert gases


Higher flowrate QB3 Series
Proportion Air High Flow Electronic Pressure Regulator

QB3


QB3 Brochure
Ranges up to 150 psig
  • 0.25% Accuracy
  • Flow rates to 40 scfm
  • Optional digital display (shown)
  • IP65 Aluminum enclosure
  • Includes integral volume booster
  • 4-20 mA or 0-10 VDC
  • Nickel plated aluminum or brass body
  • For air and inert gases
  • Optional Oxygen Clean (brass)
Proportion Air High Flow Electronic Pressure Regulators

QB3H
High Pressure


QB3H Brochure
Ranges up to 500 psig
  • 0.5% Accuracy
  • Flow rates to 50 scfm
  • IP65 Aluminum enclosure
  • Includes integral volume booster
  • 4-20 mA or 0-10 VDC
  • Nickel plated aluminum or brass body
  • For air and inert gases
  • Optional Oxygen Clean (brass)


Other products & Custom capabilities
Contact for details

Proportion-Air offers dozens of other models and configurations and also integrates their electronic pressure regulators with many dome-loaded pressure reducing regulators to meet customers requirements.
Visit www.proportionair.com for details.
  • Custom system integration
  • Pressure up to 1000 psig
  • Vacuum 0-30 inHg
  • Intrinsically safe configuations
  • Oxygen cleaning per ASTM G-93
  • Air flow rates to 2000 scfm
  • Water flow rates to 30 GPM and greater
  • Serial / DeviceNet communications
  • Also, precision control of flow, position, torque

Contact us

Contact Equilibar for assistance in selecting the right Proportion-Air product. Your application will receive prompt attention by a trained engineer.



Application Focus:
Automated Pump Pressure Control System

Marsh Bellofram Precision Controls

The schematic at right shows how an Equilibar Back Pressure Regulator can work together with an E/P Regulator to provide automated pressure control with virtually any type of pump.

Also suitable for pulse generating applications.