Air compressors are used to provide air pressure for pneumatic and other air tools like nail guns and staplers. Accessories like nailers are attached to the air compressor, and the compressor feeds air to operate the tool. An on/off switch turns on the compressor; a tank pressure gauge measures the pressure level of the air in the tank; an air pressure regulator lets you adjust the line pressure to the accessory; a regulated pressure gauge measures that outlet pressure; a relief valve ring empties the tank of air.
Turn the on/off switch to the off position, and close the tank drain valve by turning it clockwise. Connect a 1/4-inch air hose to the air line outlet. Attach the air tool to the air hose. Plug the compressor into a household power outlet.
Turn the on/off switch to the on position. Adjust the air pressure regulator to the working pressure of the tool. Adjust from a higher to lower pressure by turning the knob counterclockwise past the setting you want, and then clockwise again to the pressure setting.
Perform the work allowing the air compressor tank to automatically fill as necessary. You can watch the air pressure in the tank with the tank pressure gauge.
Shut down the air compressor on completion of the job. Turn the on/off switch to the off position and unplug the power cord. Reduce pressure in the tank by pulling on the relief valve ring.
Tip the compressor so that the drain valve is on the bottom of the tank, and open the drain valve to drain. Moisture is a byproduct of air pressure, and will corrode, so perform this maintenance at the end of each job.
Air compressors can also be used around the home to clean with compressed air, and to inflate air beds and bicycle tires.