Below are the reputable IMC and J-Air brand vertical tank air compressors. These are AMERICAN MADE and built to last.
In the realm of commercial quality compressors, it's not unusual for shops to run them 16 to 24 hours continously. So, we mostly carry the 'light' and 'medium' duty models. Trust us when we say these are NOT flimsy compressors you'll find at Home Depot!! These manufacturer's earmark these things as 'light' or 'medium' duty relative to the 'heavy' demands of, say, a battle ship!
Again, these are American Made, top-quality oil bath air compressors. Most are 1-phase. They'll hold up well in a 50% duty-cycle environment... and will likely last 20+ years with proper oil-change maintenance.