By . Air Compressor. At Thursday, August 09th 2018, 19:17:56 PM.
A rotary vane air compressor uses a rotor and a number of blades in radial slots in the rotor. I do not fully understand how this works, but it has something to do with the rotor turning and the blades sliding in and out of their slots as they keep contact with the housing wall. This somehow creates decreasing volume.
Years later, I built a smaller woodworking shop in my home which only required one air sander running at a time. For that shop, I purchased an air compressor half the size and isolated it in a soundproof room in one section of the shop. I ran galvanized pipe under the shop floor to three regulators at three different connection locations. The machine I purchased for that shop as a 5 HP Ingersoll Rand model with an 80 gallon tank. At the 80 PSI required by my Dynabrade sander, the compressor would produce enough air from morning to night. I must say that that compressor was very well built. All I had to do was keep an eye on the oil level in the sight glass. At night, I would turn off the master air valve on the side of the air compressor, leaving the electricity on, to silence the compressor until the next work day.
One time we were working together on a small project that John had lined up for us. I was all powered up and fully charged with air pressure like normal. Everything seemed just fine. I heard the buzz of electric saws and saw the normal saw dust flying around. Then, all of a sudden, and without any warning, my breath was taken away from me in a gush! I thought I was going to die. John had accidentally set his circular saw down on my hose and cut into it. It alarmed me at first, but before long John had me all fixed up and back to work we went. Ah, such is the life of a portable air compressor.