Air Pressure Regulators Inches of Water Specifications

To size an air pressure regulator measured in inches of water for tubing extrusion, consider three key factors: (1) your required output pressure range — options include 0-3, 0-5, or 0-30 inches of water; (2) your control type — manual, contact closure input, or 0-10V voltage input for PLC integration; and (3) your response speed requirement — standard models respond in approximately 2 minutes, while high-speed models respond in under 0.1 second. The input supply pressure must be factory air regulated down to 45–65 psi.

On Line Controls offers regulators with ranges from 0-3 inches of water up to 0-30 inches of water, plus higher psi options such as 0-5 psi, to cover a wide spectrum of ultra-low pressure tubing extrusion needs.

The MicroAir series provides better than 0.1 inch of water resolution with hysteresis-free regulating action, ensuring maximum precision and stable diameter control even with widely varying flow rates.

Yes. The MicroAir IV series accepts a 0-10 volt input signal for direct PLC integration and high-speed automated control. The MultiAir 4-channel MicroAir IV also supports this input, enabling separate pressure control for each lumen in multi-lumen tubing applications.

On Line Controls' inches-of-water pressure regulators are used across medical device manufacturing (catheter and multi-lumen tubing), automotive manufacturing (fuel lines and precision tubing), plastic profile extrusion, and micro-tube manufacturing where ultra-low, stable air pressure is critical to diameter control.

The MicroAir I uses a simple 30-turn manual knob for precise set-point adjustment. The MicroAir II accepts Air Up and Air Down contact closure inputs from diameter gauges or other controllers, with dual-speed manual buttons as a backup. The MicroAir IV accepts a 0-10V input for high-speed PLC-driven switching, using a precision voice-coil linear motor with viscostatic damping for optimum speed and stability — ideal for bump and taper tubing applications.

All MicroAir units must be mounted vertically using four 5/16-inch diameter mounting holes for proper operation. The required air input is standard factory compressed air regulated down to a 45–65 psi range to ensure accurate and reliable ultra-low pressure output.