Pass or Fail?

A recent post on Pneumatic Tips shows the impact of oversizing when going from piston to rotary screw compressors. We’ve compared piston compressors to rotary screws several times, but this post presents an example illustrating the fact that proper sizing is an important factor when choosing an air compressor, not just what type of compressor it is.

Tips on buying screw compressors:

* Don’t buy bigger than you need,

* Multiple smaller compressors run more efficiently than one large unit,

* Most screw compressors can turn off between load cycles if there is adequate storage receiver capacity, and

* Adequate storage means having about 5 to 10 gallons of receiver capacity times the output of the main compressor.

Paul Heney – Pneumatic Tips

Read the blog post here: Compressed air fail: Piston to screw upgrade

Additional Resources:

2 thoughts on “Pass or Fail?

  1. Hello:
    “Adequate storage means having about 5 to 10 gallons of receiver capacity times the output of the main compressor.”
    this is not clear…. do we talk output in Gallons/minutes?????? this may be obvious to you , but…

    so let’s say compressor does 6 gallon/minute, you suggest adequate storage should be 30 to 60 gallons air?

    Please confirm my understanding and take a step back to see your first statement was not clear.

    Thank you

    1. Excellent point — the 5-10 correlation for storage-to-output flow only applies when “cfm” is used to represent compressor output flow and “gallons” is used to represent storage volume.

      A compressor output flow of 6 gallons/minute equates to approximately 0.8 cfm. Applying the 5-10 correlation to this value would provide a recommended storage volume of 4-8 gallons.

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