alwaysFlOoReD
Well-known member
I've been gathering pieces for a compressor build for years and I finally had all that I needed. The last was a portable tank that had a non-working motor. I paid $75.00 for a 25 gallon Craftsman tank with a triple compressor head and all fittings. I have on hand another 2-stage compressor head that I bought from Princess auto brand new from the surplus section for $75.00, and a 5hp 240V 22 Amp electric motor also bought for $75.00. Some more fittings ended up costing me about, you guessed it, $75.00.
I didn't get a pic of the old setup.
A proof of concept with the new motor and head on the old tank and old fittings;
It worked but the way the fittings were installed there was lots of adapters and bushings to get various types of fittings to work together. I didn't like how it looked and suspected airflow would be compromised if I didn't clean it up.
I tore it all down and cleaned and quickly sprayed the tank. I found an old spray bomb that was real close to the tank color so I saved a bit of work. This is going to be a working compressor so I'm not worried about bling paint jobs.
The bottom of the tank had a stainless extension with a valve on the end for a drain valve. I like the idea as it's easy to reach;
Here I'm trying to fit all the parts together;
There is a mistake in the previous picture. There is supposed to be a line from before the checkvalve in order to unload pressure for when the compressor starts up. It makes it a lot easier on the electric motor if it isn't trying to overcome 135 psi when it starts. I had it plumbed after the check valve.
I caught it before I got too far and made up the following;
Some pics of the wiring job;
Dip the ends of the wire in dielectric grease;
The ends of the wire stripped ~ 1/4". You don't need more;
Ratcheting crimps...no more bad connections;
I did get it all together and it filled the tank in 3 minutes and 18 seconds. The tank is 25 gallons. The motor rpm is 3450. The motor pulley diameter is 4.75". The head pulley dia. is 14.5". The pressure is 135 psi.
I'll figure out the cfm later and post more pics later,
Richard
I didn't get a pic of the old setup.
A proof of concept with the new motor and head on the old tank and old fittings;
It worked but the way the fittings were installed there was lots of adapters and bushings to get various types of fittings to work together. I didn't like how it looked and suspected airflow would be compromised if I didn't clean it up.
I tore it all down and cleaned and quickly sprayed the tank. I found an old spray bomb that was real close to the tank color so I saved a bit of work. This is going to be a working compressor so I'm not worried about bling paint jobs.
The bottom of the tank had a stainless extension with a valve on the end for a drain valve. I like the idea as it's easy to reach;
Here I'm trying to fit all the parts together;
There is a mistake in the previous picture. There is supposed to be a line from before the checkvalve in order to unload pressure for when the compressor starts up. It makes it a lot easier on the electric motor if it isn't trying to overcome 135 psi when it starts. I had it plumbed after the check valve.
I caught it before I got too far and made up the following;
Some pics of the wiring job;
Dip the ends of the wire in dielectric grease;
The ends of the wire stripped ~ 1/4". You don't need more;
Ratcheting crimps...no more bad connections;
I did get it all together and it filled the tank in 3 minutes and 18 seconds. The tank is 25 gallons. The motor rpm is 3450. The motor pulley diameter is 4.75". The head pulley dia. is 14.5". The pressure is 135 psi.
I'll figure out the cfm later and post more pics later,
Richard
