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

CE Compliant

Bellofram Type 91 Subminiature Air Regulator 5mm NPT 0-5 PSI

Bellofram Type 91 Subminiature Air Regulators provide ultra-precise pressure control from 0-5 PSI with 5mm NPT connections. These compact regulators feature hysteresis-free operation, manual adjustment capabilities, and stable performance for critical applications requiring exact pressure regulation in space-constrained environments.

Our Range of Products

Single Channel MicroAir I

Single Channel MicroAir I

  • Below 1" water regulation
  • 10-20 year life expectancy
  • 4½" Magnehelic display
Dual Channel MicroAir II

Dual Channel MicroAir II

  • Contact closure inputs
  • Red/Green control buttons
  • Damping fluid operation
MultiAir 3-channel MicroAir IV

MultiAir 3-channel MicroAir IV

  • 0-10V PLC input control
  • 3-channel configuration
  • Voice-coil linear motor
Single Channel MicroAir IV

Single Channel MicroAir IV

  • 0-10V high speed switching
  • Three operational modes
  • Voice-coil linear motor
Dual Channel MicroAir I

Dual Channel MicroAir I

  • Manual 30-turn precise control
  • Hysteresis free regulation
  • Stainless steel enclosure
Dual Channel MicroAir IV

Dual Channel MicroAir IV

  • High speed programmable switching
  • 0-10 volt PLC input control
  • Dual channel design

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Frequently Asked Questions

What pressure ranges are available for these air regulators?

Available pressure ranges from 0-3 inches of water up to 0-5 PSI for precise tubing control applications.

What type of air connections do these regulators use?

How long is the warranty on these air pressure regulators?

Can these regulators be used for multi-lumen tubing applications?

What is the typical response time for pressure adjustments?

Do these regulators require calibration or maintenance?

Are these air regulators suitable for medical tubing production?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

Medical Device Manufacturing

Medical Device Manufacturing

Precise air pressure control for medical tubing, catheter production, and sterile tubing applications.

Automotive Manufacturing

Automotive Manufacturing

Ultra-precise pressure regulation for automotive tubing extrusion and profile manufacturing.

Plastic Extrusion

Plastic Extrusion

Industry-standard air pressure control for plastic profile extrusion and tubing diameter control.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

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Dual Channel MicroAir II

1/4 NPT Low Pressure Gauge Regulator 0-5 PSI

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MultiAir 3-channel MicroAir IV

0-15 PSI Air Pressure Regulator with NPT Port

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Why Tubing Manufacturers Choose On Line Controls, Inc.

44+ Years Manufacturing Excellence

Industry-leading ultra-low air pressure regulators with proven reliability and precision for plastic tubing extrusion applications worldwide.

Unmatched Product Lifespan

Our MicroAir regulators deliver 10-25 year operational life with minimal maintenance requirements and no calibration needed.

Comprehensive Technical Support

3-year warranty on all products with unlimited phone support and expert technical assistance for optimal performance.

Request a Quote for Subminiature Air Regulators

Get expert technical guidance and pricing for your precision air control needs. Our team responds quickly with detailed specifications.

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