CE Compliant certified

CE Compliant

Made in the USA certified

Made in the USA

Upgrade Legacy Pressure Regulator on Extrusion Line

On Line Controls' MicroAir pressure regulators are precision-engineered ultra-low air pressure controllers designed for plastic tubing extrusion lines. Available in single, dual, and multi-channel configurations with manual or PLC-compatible control, they deliver hysteresis-free regulation, sub-0.1-second response times, and 10–20+ year service life for medical, automotive, and industrial tubing applications.

Single Channel MicroAir II
Single Channel MicroAir IV
Dual Channel MicroAir II
Dual Channel MicroAir I
Dual Channel MicroAir IV
Single Channel MicroAir I
MultiAir 4-channel MicroAir IV
MultiAir 3-channel MicroAir IV
MultiAir 3-channel MicroAir II
MultiAir 3-channel MicroAir I

Our Range of Products

Single Channel MicroAir II

Single Channel MicroAir II

  • Contact closure input from O.D. gauge
  • 0.1" water resolution with digital display
  • Hysteresis-free viscostatic damping action
Single Channel MicroAir IV

Single Channel MicroAir IV

  • Under 0.1s response, typically 20ms
  • 3 modes: Dual State, Linear, Manual
  • +/-0.1% full-scale accuracy below 60" water
Dual Channel MicroAir II

Dual Channel MicroAir II

  • Dual channel contact closure gauge input
  • Hysteresis-free stable damping fluid design
  • Pressure ranges from 0-3" water to 0-5 psi
Dual Channel MicroAir I

Dual Channel MicroAir I

  • Dual channel for multi-lumen extrusion
  • Hysteresis-free 30-turn manual control
  • Stable pressure across all flow rate ranges
Dual Channel MicroAir IV

Dual Channel MicroAir IV

  • Dual channel with sub-0.1s response time
  • 0-10V PLC input for programmable control
  • Hysteresis-free voice-coil motor design
Single Channel MicroAir I

Single Channel MicroAir I

  • Regulates below 1" water with precision
  • 10-20 year long service life expectancy
  • 30-turn knob for hysteresis-free control

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Frequently Asked Questions

How do I increase the pressure on a pressure regulator?

On MicroAir regulators, pressure is increased by adjusting the 30-turn precision knob (manual models) clockwise to raise the set point, or by increasing the 0–10V analog input signal on PLC-compatible models. Each unit accepts factory air regulated down to 45–55 psi and outputs ultra-low pressures from below 1 inch of water up to 5 psi with high repeatability.

How to improve the extrusion process?

What pressure ranges do MicroAir regulators cover?

Can MicroAir regulators be connected to a PLC or diameter gauge?

How fast do MicroAir regulators respond to pressure changes?

Are MicroAir regulators suitable for multi-lumen tubing production?

What warranty and support is included with a MicroAir regulator?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

Medical Tubing & Catheter Manufacturing

Medical Tubing & Catheter Manufacturing

Precise ultra-low pressure regulation ensures consistent wall thickness and OD for catheters and medical-grade tubing extrusion.

Automotive Tubing Production

Automotive Tubing Production

Stable hysteresis-free air pressure control maintains tight dimensional tolerances in automotive fuel, vacuum, and fluid tubing extrusion.

Plastic Profile Extrusion

Plastic Profile Extrusion

MicroAir regulators maintain constant internal air support during free extrusion of plastic profiles, straws, and specialty tubing.

Multi-Lumen Tubing Extrusion

Multi-Lumen Tubing Extrusion

Multi-channel MicroAir units independently control each lumen's air pressure, enabling precise structure and diameter in complex tubing.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Why Plastic Tubing Manufacturers Choose On Line Controls, Inc.

Industry-Leading Precision & Stability

MicroAir regulators deliver hysteresis-free control down to below 1 inch of water, maintaining constant pressure across widely varying flow rates for flawless tubing dimensions.

44+ Years of Extrusion Expertise

Founded in 1980, OLC is the recognized industry leader in ultra-low air pressure regulation, trusted by medical, automotive, and plastic tubing manufacturers across 18 countries.

3-Year Warranty & Lifetime Support

Every MicroAir unit ships with a 3-year parts and labor warranty, unlimited phone support, and no calibration requirements — backed by 10–20+ year product service life.

Ready to Upgrade Your Extrusion Line Pressure Control?

Submit your inquiry and our engineering team will respond with a tailored MicroAir recommendation and pricing within one business day.

Contact Us Today

For immediate assistance, feel free to give us a direct call at 978-562-5353. You can also send us a quick email at olc@onlinecontrols.com.