How Do I Adjust an Air Pressure Regulator?

The purpose of an air pressure regulator is to reduce the supply pressure to the proper working pressure. If you have a compressor that supplies 120 PSI and a tool that requires 90 PSI, you would adjust the regulator to reduce the supply pressure by 30 PSI. An air pressure regulator operates within a preset range and it's not possible to adjust it outside of that range. Adjustment within range is easy and takes only a moment.

Things You'll Need

• Flat screwdriver
• Phillips screwdriver
• Adjustable wrench

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Instructions

1. • 1

     Turn on the compressor and allow it to fill to its maximum supply pressure.

   • 2

     Unlock the adjusting knob or T-handle by loosening the locknut or retaining screw or by pulling the knob out, depending on the model of regulator.

   • 3

     Turn the knob or T-handle clockwise to increase the working pressure.

   • 4

     Turn the knob or T-handle counterclockwise to decrease the working pressure.

   • 5

     Lock the adjusting knob or T-handle by tightening the locknut or retaining screw or by pushing the knob in.