Since I purchased a new 225lx and it came with a water cooled torch I thought its about time to make a cooler. This is a free style build, The only plans are in my head. I had a CO2 pump setting around the shop for as long as I can remember, I knew I would use it for something sooner or later. It is a Procon series 1 unit with the strainer and adjustable bypass (to adjust the pressure). It has a stainless steel pump shaft, and the vanes and other internal parts seem to be made of graphite or something. I had to disassemble the pump because when I turned it on it was stuck. Upon inspection there was a little bit of dried crust that had a greenish tint. Also I think somehow the vanes had become swollen thus not allowing them to move in their slots freely. I soaked everything besides seals in some citric acid I have. This got rid of the tarnish on the brass parts and cleaned the stainless shaft. I also gave the vanes a quick soak this didn't help with the swelling. So I had a fine flat file and carefully filed the two big sides of each vane until they moved freely in the shaft. I put it all back together and ran water through it, it pumped like a champ. I put a 60psi gauge on it in an attempt to set the pressure. Well I pegged the gauge as soon as it turned on, now under zero pressure it sets at the 10psi mark. After that I was able to get it set to 50psi. Upon testing the flow I measured 2000ml in 24 seconds.
Here is a picture of the pump after being cleaned and reassembled.
Next I made the reservoir. I'm going to try and run the cooler without a heat exchanger just the reservoir. For the hot water inlet I decided to make a sort of trough at the top, inside of the tank. My thinking is that this will help evenly distribute the hot water into the cool water.
The big sides measure 12"x12", the other sides are 12"x 8".
Here are the pieces awaiting holes.
Hole for the fill neck.
Holes for the inlet outlet and water level tube.
Two corners welded.
Four corners welded.
Front side tacked in and ready to weld.
The internal baffle.
Fill neck welded on.