CE Compliant certified

CE Compliant

Made in the USA certified

Made in the USA

Prevent Tubing Collapse During Extrusion

On Line Controls' MicroAir ultra-low air pressure regulators are engineered to prevent tubing collapse during extrusion by maintaining precise internal air support. Available in single, dual, 3-channel, and 4-channel configurations with manual or PLC control, these USA-made regulators serve medical, catheter, automotive, and multi-lumen tubing manufacturers worldwide.

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

  • Accepts contact closure from O.D. gauge input
  • Dual-speed manual buttons for fast adjustment
  • Better than 0.1" water resolution displayed
Single Channel MicroAir IV

Single Channel MicroAir IV

  • Sub-0.1 sec response, typically 20 msec
  • 0-10V input for PLC or device integration
  • 3 modes: Dual State, Linear, Manual Setting
Dual Channel MicroAir II

Dual Channel MicroAir II

  • Accepts contact closure from diameter gauges
  • Dual-speed Red/Green buttons with limit light
  • Hysteresis-free stable OD regulation
Dual Channel MicroAir I

Dual Channel MicroAir I

  • Dual channel for two-lumen tubing control
  • Stable pressure across widely varying flow rates
  • Stainless steel enclosure, CE compliant
Dual Channel MicroAir IV

Dual Channel MicroAir IV

  • High-speed bump/taper switching via 0-10V input
  • Dual channel for multi-lumen extrusion control
  • Voice-coil motor with viscostatic damping
Single Channel MicroAir I

Single Channel MicroAir I

  • Regulates below 1" water with high precision
  • 30-turn knob for fine manual pressure control
  • 10–20 year long life expectancy

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Frequently Asked Questions

What causes tubing collapse during extrusion and how is it prevented?

Tubing collapse occurs when internal air pressure inside the extruded tube is insufficient to maintain its shape as it cools. MicroAir ultra-low air pressure regulators prevent collapse by supplying precisely controlled internal air support — even at pressures below 1 inch of water — ensuring consistent tube geometry throughout the extrusion process.

What pressure ranges are available for MicroAir regulators?

Can MicroAir regulators be integrated with a PLC or diameter gauge?

What is the response time of MicroAir pressure regulators?

How many channels do I need for multi-lumen tubing extrusion?

Do MicroAir regulators require calibration or regular maintenance?

Are MicroAir regulators certified for international shipping and use?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

Medical & Catheter Tubing

Medical & Catheter Tubing

Maintains ultra-precise internal air pressure during catheter and medical tube extrusion to ensure consistent OD and wall thickness.

Automotive Tubing

Automotive Tubing

Delivers stable, hysteresis-free pressure regulation for automotive tube extrusion requiring tight dimensional tolerances.

Multi-Lumen Tubing

Multi-Lumen Tubing

Independent multi-channel air pressure control for each lumen ensures uniform structure in complex multi-lumen tube profiles.

Plastic Profile Extrusion

Plastic Profile Extrusion

Prevents collapse and maintains profile geometry in plastic straw, micro-tube, and custom profile extrusion manufacturing.

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.

44+ Years of Extrusion Expertise

Since 1980, OLC has been the recognized industry standard for ultra-low air pressure regulation in plastic tubing extrusion, serving customers across 18 countries.

Precision Down to Below 1" of Water

MicroAir regulators deliver hysteresis-free, stable pressure control at ultra-low ranges, preventing tubing collapse with accuracy no generic regulator can match.

3-Year Warranty & Unlimited Support

Every unit ships with a 3-year warranty on parts and labor, unlimited phone support, and a 10–20+ year product lifespan — minimizing downtime on your extrusion line.

Get Precise Pressure Control for Your Extrusion Line

Submit your inquiry and our engineering team will respond with the right MicroAir configuration for your tubing application and pressure range requirements.

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.