CFM throttling down.

Aug 12, 2009

Reply to your answer about reducing cfm air flow
by: Don

Bill, I purchased a plastic welder from Harbor Freight that states the following:

Air Requirements 1.5 to 4.5 cfm. (recommended 2 to 2.8 cfm) with a maximum air pressure of 15 psi, working pressure 4 to 5 psi.

The air compressor I was looking to buy was rated at 5 cfm @ 90 psi with an 8 gal. tank, 2 HP rated, Harbor Freight, but I would need to reduce the cfm with this compressor.

I settled for a KoBalt from Lowe's with 2.6 cfm @ 90 psi, 1 HP (running) with a 5.5 gallon tank. I thought this would be perfect for this tool. This is my first compressor.

I have been practicing with this welder. Result are not what I expected. Could it be my air adjustment? I am confused why the welder says maximum air pressure of 15 psi and how do I get 2.6 cfm with 15 psi? I set the output air at 15 psi and added a 1/4 inch shut off value on this line and only open it half way to get the working pressure down to 7 psi, (manual states working pressure at 4-5 psi). So what happens to my 2 to 2.8 cfm? It seams working pressure and cfm setting is impossible to get together. This compressor kick-in setting is 105 up to 135 kickout psi. Yes, my compressor does drop off to almost 20 psi before much time as expired. What am I missing? Any help would be appreciated. Thanks for your time, Don

X Close Editor

Aug 12, 2009
Rating

Submitted by: Don

Title

Comment
Bill, I purchased a plastic welder from Harbor Freight that states the following: Air Requirements 1.5 to 4.5 cfm. (recommended 2 to 2.8 cfm) with a maximum air pressure of 15 psi, working pressure 4 to 5 psi. The air compressor I was looking to buy was rated at 5 cfm @ 90 psi with an 8 gal. tank, 2 HP rated, Harbor Freight, but I would need to reduce the cfm with this compressor. I settled for a KoBalt from Lowe's with 2.6 cfm @ 90 psi, 1 HP (running) with a 5.5 gallon tank. I thought this would be perfect for this tool. This is my first compressor. I have been practicing with this welder. Result are not what I expected. Could it be my air adjustment? I am confused why the welder says maximum air pressure of 15 psi and how do I get 2.6 cfm with 15 psi? I set the output air at 15 psi and added a 1/4 inch shut off value on this line and only open it half way to get the working pressure down to 7 psi, (manual states working pressure at 4-5 psi). So what happens to my 2 to 2.8 cfm? It seams working pressure and cfm setting is impossible to get together. This compressor kick-in setting is 105 up to 135 kickout psi. Yes, my compressor does drop off to almost 20 psi before much time as expired. What am I missing? Any help would be appreciated. Thanks for your time, Don

Cancel Delete Delete & Ban

throbber Updating Comments page...

CFM throttling down.

Comments for CFM throttling down.

Comments for
CFM throttling down.