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How to Calculate CFM on an Air Compressor - LP Texas L001182

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How to Calculate CFM on an Air Compressor - LP Texas L001182

5,884 views October 25, 2016 3:11

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ChannelRanch Rite

Description from the creator

This is an easy way to calculate the ACFM (Actual CFM) of any air compressor. This way, you don't have to rely on advertising claims or brochures. You know how much air you need when shopping for a new air compressor pump or a complete air compressor.

1. STOP the compressor unit

2. CLOSE the outlet valve on the tank/air receiver

3. DRAIN the condensate from air receiver until there is 0 PSIG -then close the drain valve

4. NOTE THE TIME– in minutes & seconds (Best to write it down.) Then START THE UNIT.
When the compressor unit stops and unloads – then NOTE THE TIME again – in minutes & seconds. Convert the minutes into seconds and then total the number of seconds it takes between START and STOP/UNLOAD.

5. NOTE the GUAGE PSIG reading

6. NOTE the Air Receiver/Tank GALLON SIZE

7. USE THIS FORMULA:

TANK GALLONS x .536* x PSIG divided by SECONDS

*.536 is a formula factor for the unknown that works to give you the CFM delivery.

EXAMPLE:
You have an 30 gallon tank, your total start to stop/unload time was 3 minutes and 5 seconds.
Change the minutes to seconds timed (60 x 3= 180 seconds plus 5 seconds totals 185 - 22 seconds when the valve was closed = 163). You will use the total number of seconds 163 and the noted 175 PSIG within the formula as shown below:

30 multiplied by .536 = 16.08
16.08 multiplied by 175 (example PSIG) = 1608.00
1508.00 divided by 163 (total seconds)= 17.26 CFM delivered

You now know that your air compressor is delivering 17.26 CFM

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About this tutorial

Ranch Rite published this 3:11 video tutorial on October 25, 2016. It has been watched 5,884 times on YouTube.

Channel
Ranch Rite
Duration
3:11
Published
October 25, 2016
Views
5,884
Likes
10

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