MicroAir I — Manual Ultra Low Pressure Regulator

The 30-turn fine adjustment knob allows extremely small incremental changes to the set point, enabling operators to dial in pressures with exceptional accuracy — even below 1" of water. This granular control is essential for maintaining consistent outside diameter in medical and catheter tubing extrusion without overshooting or oscillating.

Hysteresis-free regulation means the regulator responds identically whether pressure is being increased or decreased, with no lag or dead band. In tubing extrusion, this ensures the internal air pressure remains perfectly stable and consistent, directly resulting in tighter dimensional tolerances and fewer defective products across the production run.

Yes. The MicroAir I is specifically engineered to maintain a constant set-point pressure even when flow rates vary widely — from near zero to maximum. Viscostatic damping fluid stabilizes the regulating element without contacting the process air, ensuring output pressure remains steady throughout all phases of extrusion.

MicroAir I regulators are used in medical tubing, catheter tubing, multi-lumen tubing, automotive tubing, plastic profile extrusion, micro-tube manufacturing, and plastic straw extrusion. The multi-channel variants are particularly suited to multi-lumen applications where each lumen requires independent air pressure regulation.

MicroAir I regulators are designed for a long life expectancy of 10 to 20 years under normal operating conditions. This durability is supported by a robust stainless steel enclosure, viscostatic damping that involves no moving parts contacting process air, and the absence of springs or complex electromechanical components in the regulating action.

No calibration is required for the MicroAir I. The unit ships ready to use with factory air regulated to approximately 45–50 psi as the input source. Routine maintenance needs are minimal due to the simple manual design and viscostatic damping system. On Line Controls also offers a range change service, free within 30 days of purchase.