12/5/2023 0 Comments Air compressor for body shopHow do we know that the Apache can service the demand while running at a 94 percent duty cycle and a B5 can service this demand while running at an 83 percent duty-cycle? The Apache A5 rotary screw air compressor delivers 16 SCFM of compressed air and would meet the 15 SCFM demand while running at a 94 percent duty cycle.Īlternatively, a B5 rotary screw compressor, which delivers 18 SCFM of compressed air would meet the demand while running at an 83 percent duty cycle. This results in 15 SCFM, meaning we need a rotary screw air compressor that can deliver at least this amount of compressed air at a maximum 100 percent duty cycle. In terms of rotary screw air compressors, which have a 100 percent maximum duty cycle, we will divide 15 SCFM by the number 1.0, which represents a 100 percent duty cycle in decimal format. We’re going to show you a simple calculation that will let you know how to size air compressors with different duty-cycles to a given compressed air demand need, in this case, 15 SCFM. It’s an unlikely circumstance in real-life, but suitable for our purposes of explanation. For illustrative purposes, let’s assume that 15 SCFM is the absolute maximum compressed air demand ever needed by this repair shop. The compressed air demand is estimated to be approximately 15 SCFM. Let’s see what this means in terms of sizing and selecting an appropriate type of air compressor using the example of an auto repair shop with two bays and three technicians. Keep in mind these ratings refer to an eight-hour day. Rotary screw air compressors have a 100 percent duty-cycle and can run continuously 24/7, while pressure-lubricated heavy duty industrial piston air compressors have approximately an 80 percent maximum duty-cycle, needing to cycle off 20 percent of the time, and splash-lubricated industrial air compressors have approximately a 60 percent maximum duty-cycle, needing to cycle-off 40 percent of the time. This highlight's another important point to remember: Selecting an air compressor with a duty-cycle rating appropriate for your compressed air usage is critical.ĭifferent types of air compressors have different duty cycles. Just like compressed air tools and their activities have use-factors, the proportion of time a tool is used versus the time it isn’t, air compressors have duty-cycles, the proportion of time the air compressor can operate without the risk of overheating and sustaining excessive wear, versus the time the air compressor needs to stop and cool down, before it resumes again. What do you use your compressed air for? Or how do you use your compressed air in a typical day?
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