Expert PSI Pressure Systems Solutions for Industrial Applications

Advanced pressure control systems engineered for precision manufacturing. Our MicroAir regulators and motorized potentiometers deliver ultra-low air pressure regulation with exceptional accuracy, ensuring optimal performance in industrial extrusion processes. Trusted by leading manufacturers worldwide for over 40 years of reliable operation.

Advanced PSI pressure control systems for industrial manufacturing

Our PSI Pressure Systems Services

Comprehensive pressure control solutions from sales to repair and technical support for industrial applications.

MicroAir Sales

Ultra-low air pressure regulators for plastic extrusion manufacturing, available in single to 4-channel configurations with worldwide shipping capability.

Motorized Potentiometer Sales

Precision DC and AC motorized potentiometers with customizable resistance values, RPMs, and gang configurations for industrial control applications.

MicroAir Repair

Professional repair services for MicroAir units under 10 years old, including testing, component replacement, and 3-year warranty coverage.

Motorized Potentiometer Repair

Expert repair and rebuilding services for both current and legacy motorized potentiometer models from the 1980s and 1990s.

MicroAir Technical Support

Unlimited phone support for installation, troubleshooting, and maintenance guidance across all MicroAir models and configurations.

Custom Pressure Solutions

Engineered pressure control systems tailored to specific industrial requirements with ranges from 0-2 inches of water to 0-5 psi.

Made in USA

Precision Engineered for Industrial Excellence

Our pressure systems deliver unmatched precision and reliability for industrial manufacturing processes. With ultra-low air pressure regulation capabilities and hysteresis-free operation, our solutions ensure consistent product quality and minimal maintenance requirements. Every system is manufactured in our Massachusetts facility with rigorous quality standards and backed by comprehensive technical support.

Precision pressure control equipment in industrial manufacturing setting
Proven Results

Industry Leaders Trust Us

Leading manufacturers worldwide rely on our precision pressure control solutions for critical applications.

"MicroAir units have transformed our tubing extrusion line. The precision and reliability are unmatched. After 15 years, still performing flawlessly with minimal maintenance required."

Robert Chen

"We struggled with inconsistent OD measurements until switching to OLC's psi pressure systems. Now our reject rate dropped 40% and our customers notice the quality improvement immediately."

Maria Gonzalez

"OLC's psi pressure systems give us competitive advantage in catheter manufacturing. Their technical support team understands our exact needs and responds instantly to any questions."

James Mitchell

"Our line went down Friday afternoon. OLC's MicroAir Technical Support team diagnosed and fixed the issue within two hours. Their responsiveness saved us thousands in lost production."

Patricia Rossi

"The three-year warranty on MicroAir units provides outstanding value. Even our older units qualify for repair service at reasonable costs. Best investment we've made for our extrusion equipment."

David Kumar

"Kay DeWolfe and the team have been our trusted partner for over 12 years. They understand our production challenges and consistently deliver solutions that work perfectly."

Anthony Ferraro

"The MicroAir IV's 0-10 volt input capability allowed us to integrate high-speed switching for bump and taper tubing applications. Performance is flawless with instant response to pressure changes."

Sarah Nakamura

"As an extruder OEM, we specify OLC's psi pressure systems because they're the industry standard. Our customers demand precision air controls, and MicroAir delivers every single time."

Henrik Karlsson

"MicroAir units have transformed our tubing extrusion line. The precision and reliability are unmatched. After 15 years, still performing flawlessly with minimal maintenance required."

Robert Chen

"We struggled with inconsistent OD measurements until switching to OLC's psi pressure systems. Now our reject rate dropped 40% and our customers notice the quality improvement immediately."

Maria Gonzalez

"OLC's psi pressure systems give us competitive advantage in catheter manufacturing. Their technical support team understands our exact needs and responds instantly to any questions."

James Mitchell

"Our line went down Friday afternoon. OLC's MicroAir Technical Support team diagnosed and fixed the issue within two hours. Their responsiveness saved us thousands in lost production."

Patricia Rossi

"The three-year warranty on MicroAir units provides outstanding value. Even our older units qualify for repair service at reasonable costs. Best investment we've made for our extrusion equipment."

David Kumar

"Kay DeWolfe and the team have been our trusted partner for over 12 years. They understand our production challenges and consistently deliver solutions that work perfectly."

Anthony Ferraro

"The MicroAir IV's 0-10 volt input capability allowed us to integrate high-speed switching for bump and taper tubing applications. Performance is flawless with instant response to pressure changes."

Sarah Nakamura

"As an extruder OEM, we specify OLC's psi pressure systems because they're the industry standard. Our customers demand precision air controls, and MicroAir delivers every single time."

Henrik Karlsson

"MicroAir units have transformed our tubing extrusion line. The precision and reliability are unmatched. After 15 years, still performing flawlessly with minimal maintenance required."

Robert Chen

"We struggled with inconsistent OD measurements until switching to OLC's psi pressure systems. Now our reject rate dropped 40% and our customers notice the quality improvement immediately."

Maria Gonzalez

"OLC's psi pressure systems give us competitive advantage in catheter manufacturing. Their technical support team understands our exact needs and responds instantly to any questions."

James Mitchell

"Our line went down Friday afternoon. OLC's MicroAir Technical Support team diagnosed and fixed the issue within two hours. Their responsiveness saved us thousands in lost production."

Patricia Rossi

"The three-year warranty on MicroAir units provides outstanding value. Even our older units qualify for repair service at reasonable costs. Best investment we've made for our extrusion equipment."

David Kumar

"Kay DeWolfe and the team have been our trusted partner for over 12 years. They understand our production challenges and consistently deliver solutions that work perfectly."

Anthony Ferraro

"The MicroAir IV's 0-10 volt input capability allowed us to integrate high-speed switching for bump and taper tubing applications. Performance is flawless with instant response to pressure changes."

Sarah Nakamura

"As an extruder OEM, we specify OLC's psi pressure systems because they're the industry standard. Our customers demand precision air controls, and MicroAir delivers every single time."

Henrik Karlsson
The OLC Difference

Why Choose On Line Controls?

Four decades of engineering excellence in precision pressure control systems.

Precision

Ultra-low air pressure regulation with instant response and hysteresis-free operation for consistent results.

Durability

Products engineered for 10-25 year lifespans with minimal maintenance requirements and exceptional reliability.

USA Made

All products manufactured in our Shrewsbury, Massachusetts facility ensuring quality control and rapid support.

Global Reach

Worldwide shipping capabilities serving customers across 18 countries with comprehensive technical support.

Meet The OLC Team

Experienced professionals dedicated to precision engineering excellence.

Kay DeWolfe

President

Kay DeWolfe serves as both owner and President of On Line Controls, Inc., bringing over 35 years of invaluable experience to the industrial pressure control industry. Under her leadership, the company has maintained its position as the recognized industry leader in ultra-low air pressure regulators for plastic tubing extrusion. Kay's extensive background in precision manufacturing and customer support has been instrumental in expanding OLC's global reach to serve customers across 18 countries while maintaining the highest quality standards. Her commitment to engineering excellence and customer satisfaction continues to drive the company's innovation in pressure control technology, ensuring that OLC's MicroAir and motorized potentiometer products remain the industry standard for precision and reliability.

Frequently Asked Questions

What pressure ranges are available for MicroAir systems?

MicroAir systems offer ultra-low pressure ranges from as low as 0-2 inches of water up to 0-5 psi, designed specifically for precision control in plastic tubing extrusion applications.

How long do MicroAir pressure regulators typically last?

What warranty coverage is provided with new equipment?

Can older MicroAir units be repaired or serviced?

Do you provide international shipping and support?

What types of motorized potentiometers are available?

How quickly can repairs be completed?

What technical support is included with purchase?

Need Technical Assistance?

Our engineering experts are ready to help with your pressure control requirements.

Certified & Trusted

Awards and Recognition

CE compliance certification logo

CE Compliance

International shipping certified

MPO Magazine industry recognition award

MPO Magazine Feature

Industry excellence recognition

ISO quality standards certification

ISO Quality Standards

Manufacturing excellence certified

Ready to Optimize Your Pressure Control Systems?

Contact our engineering team for technical specifications, custom solutions, or expert consultation on your industrial pressure control 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