Replace Failing Pressure Regulator on Extrusion Line

Common signs include inconsistent tubing outside diameter, inability to hold a stable set point, pressure drift despite no flow change, visible leaks, or erratic gauge readings. If your regulator cannot maintain pressure below 5 psi reliably or exhibits hysteresis, it is likely time for a direct replacement with a MicroAir unit.

OLC MicroAir regulators are available in pressure ranges from 0–2 inches of water up to 0–5 psi, including ultra-low ranges of 0–3 and 0–5 inches of water. Each unit can be ordered in the range that matches your existing extrusion process, and range change service is available if your requirements change.

In most cases, yes. MicroAir units use standard 1/4" NPT male air fittings and connect to normal factory air regulated to 45–65 psi depending on the model. They mount vertically using four 5/16" diameter holes. Single-channel models share the same 12" x 10" x 6" footprint, making direct replacement straightforward.

MicroAir I uses a manual 30-turn knob for set-point adjustment. MicroAir II accepts contact closure inputs from an OD gauge or controller for automated adjustments, plus manual buttons. MicroAir IV uses a 0–10V analog input for PLC integration and provides high-speed response under 0.1 second, ideal for bump and taper tubing applications.

Yes. The MicroAir IV series accepts a 0–10V analog input compatible with PLCs and external diameter gauges, enabling fully automated closed-loop control. The MicroAir II series accepts contact closure inputs from diameter gauges for semi-automated control. Both series are used alongside OEM extruder systems from Davis-Standard, Conair, and Gimac.

All OLC MicroAir regulators include a three-year warranty covering parts and labor, with unlimited phone support for the life of the product. A range change kit or service is available if you need to adjust the pressure range after purchase. Units ship worldwide via UPS, DHL, or FedEx from Shrewsbury, Massachusetts.