Air Compressors-General Information

Air Compressors-General Information

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NOTE: Glastar does not sell air compressors. The following information is to assist you in choosing the right compressor to match your sandblaster.

An air compressor is necessary to power the blaster, no matter what kind of blaster you have. The output of the compressor must be matched to the air consumption of the sandblaster for the best efficiency.

The air consumption of any blaster can be figured from the air requirement chart on the nozzle page. Find the nozzle size that comes with the blaster. The chart will tell you the CFM required for continuous blasting at a given pressure. As you use the nozzle, the orifice will enlarge rather quickly, consuming ever increasing amounts of air. The nozzle will enlarge to the point where it is consuming more air than the compressor produces. The compressor will run constantly, losing pressure and overheating in the process. When the compressor runs almost continuously, it is time to replace the nozzle in order to save wear on the compressor. A small compressor will save money initially, but it will cost far more in wasted time waiting for the compressor to catch up.


Most people doing decorative sandblasting use 2HP to 5HP compressors and pressure blasters with 3/32" nozzles. Using a 2HP compressor and silicon carbide as an abrasive, a nozzle will enlarge to the point where it needs to be replaced in about an hour. An industrial 5HP compressor provides enough air so you could use the nozzle 2-3 hours. If you only blast 6 hours per week, you would purchase 312 nozzles in a year with the 2HP compressor or only 156 with the 5PH compressor. At approximately $3.25 per nozzle, the 5PH compressor will save you about $507 per year. Those savings alone would pay off the extra cost of a 5HP compressor in 3 years.

 

 

 

Air Compressor Comparison Table

Model

HP

Volts @ 60 Hz
single phase

CFM

Wt.(lbs.)

Pump RPM

Config.

SizeL x W x H

Tank in gals.

Compressor
Type

Starter
included

A

2

115

5 @
100 psi

118

1700

portable

36 x 21 x 33

20

single stage
direct drive

N/A

B

5

230

9.5 @
100 psi

290

932

vertical

22 x 29 x 33

60

single stage
belt drive

no

C

5

230*

16.5 @
170 psi

452

1700

vertical
or horizontal

39 x 30 x 78 OR
68 x 22 x 48

80

two stage
direct drive

motor
starter

D

5

230*

15.8 @
170 psi

806

700

vertical
or horizontal

25 x 33 x 79 OR
68 x 23 x 51

80

two stage
belt drive

magnetic
starter

 

*Three phase also available. All 5 hp units have ASME Code Tanks

  • A light duty compressor for use where 230 volts is not available.
  • A light duty compressor for shops doing only a small amount of blasting.
  • A light duty commercial compressor for shops doing a moderate amount of blasting.
  • A heavy duty commercial/industrial compressor for use on a heavy continuous basis for many years.