FAQ: What Size Air Compressor to Use?

The size of the air compressor needed is based on the size of your blast nozzle.

If you have a 1/4″ nozzle (such as what you get with the Titan 300 series), you’ll need, at the minimum, an air compressor that provides 81 CFM (cubic feet per minute) at 100 PSI.

In addition, you’ll need to factor in:

  • A decent amount of air reserve – 50% is recommended
  • Approximately 20 CFM for the operator’s air-fed helmet
  • Multiple operators

CFM Requirements for One Operator

Nozzle Orifice Size Air Volume Helmet Reserve (50%) Minimum Air Required
No. 4 1/4″
6.5mm
81
2.3
20
0.5
50
1.4
151 CFM
4.2 m3/min
No. 5 5/16″
8.0mm
137
3.9
20
0.5
79
2.2
236 CFM
6.6 m3/min
No. 6 3/8″
9.5mm
196
5.5
20
0.5
108
3.0
324 CFM
9.0 m3/min
No. 7 7/16″
11.0mm
254
7.2
20
0.5
137
3.9
411 CFM
11.6 m3/min
No. 8 1/2″
12.5mm
338
9.6
20
0.5
179
5.0
537 CFM
16.1 m3/min

Should we purchase a diesel or electric air compressor?

Typically, Titan blast pots are used with portable, diesel-driven rotary screw compressors.

For Titan pre-built blast rooms, we recommend an electric rotary screw compressor with a refrigerated air dryer. Usually, a 50 – 60 hp compressor will do the job, depending on the number of operators and the size nozzle(s) being used.

Clean, dry air is a MUST for blasting. Once you get moisture in the media and system components, you’ll encounter increased maintenance issues and possible downtime.

Does Titan provide air compressors with its blast machine packages?

We don’t provide air compressors. However, we can help you choose the correct one for your blast pot size and application.

We recommend searching eBay for used air compressors or purchasing new from an OEM air compressor manufacturer.

For Titan 300 lb and 600 lb blast machines, we typically recommend a 185 CFM, diesel-driven air compressor. They’re very common and readily available from equipment rental companies.

Do you have other questions about CFM or which size Titan blast machine to use with your application?

Feel free to contact us via email or phone.

Brandon Acker

As CEO of Titan Abrasive, Brandon Acker oversees the design and manufacture of the company’s complete line of blast room / blast machine products for industrial applications.

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