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Sizing Air Compressor for Sandblasters

12/09/2016
by Matt Mazanec

Sizing an air compressor for sandblasters can feel like a headache. Luckily, the Compressor World team is ready with answers to help you tackle your next project. 

Here are a few research tips and questions to ask your supplier:

  • What size nozzle is being used?
  • Does the nozzle wear?
  • What size air compressor do you recommend?*
  • For new systems, know what power supply is available**

*Have your supplier give you the cubic feet per minute (CFM) required per nozzle. Understanding how much air is required can help you size the right compressor and/or how much air you will be taking from the current house compressor system. 

**Power supplies range from 115/1/60, 230/1/60, 230/3/60, to 460/3/60. Remember, single-phase limits the size of your air compressor, limiting you to a maximum of a single, 7.5 horsepower compressor or multiple units. 

Once you get appropriate air and voltage requirements, you can then size the air compressor for your sandblaster. It is recommended to size the air compressor 20% over the demand or requirement. 

Here are a few tips when sizing air compressors for sandblasters:

  • 15-17 CFM = 5 horsepower air compressor
  • 18-25 CFM = 7.5 horsepower air compressor
  • 26-37 CFM = 10 horsepower air compressor
  • 38-60 CFM = 15 horsepower air compressor
  • 60-80 CFM = 20 horsepower air compressor
  • 80-110 CFM = 25 horsepower air compressor
  • 110-125 CFM = 30 horsepower air compressor
  • 125-180 CFM = 40 horsepower air compressor

If you plan on operating the sandblaster on continuous duty, it is recommended to install a rotary screw compressor since they are rated for 100% duty. People often think rotary screw compressors are always turned on, a misconception as newer models hvae built-in timers where they will turn off with no demand. If you plan on running the sandblaster at a lower duty cycle, a two-stage air compressor would work just fine. 

Have any lingering questions? Contact our team of experienced air compressor experts by calling 866-778-6572 or email info@compressorworld.com