Re: thick coatings
I am also using a 30V20A PS. Your voltage requirements are in direct relation to the CD you choose to run. A 12 ASF is on the edge of being too much for a 30A supply. That is the reason I still use 8 to 10 ASF. Running the lower tank temps will increase the voltage demand a couple of volts. The motorcycle fork tubes (6061/7075) were approx. 279" SA each. I had to run them one at a time because the set amperage was 15.5A for an 8 ASF. They all peaked at 23 to 24 volts. Part was due to a 60 degree tank temp and part due to SA calculation being off just a little.
The tank is setup with a 3/4" bulk head connector in the center bottom of the end. I have a 3/4" PVC ball valve plumbed into it and then to the pump intake. This allows me to isolate the tank for adjustments or problems. The other two 3/4" bulk head connectors are center of the tank height and adapted to 1/2" ID also with PVC ball valves. The volume or flow can be adjusted with the two 1/2" ball valves. To get the best flow pressure for the pump I have, I calculated the pumps output area of 1/2" and jetted the tank output to match closely. To clarify, 1/2" has a .196" area, I have 3 output tubes each capped and a 1/4" hole drilled center. Three 1/4" holes have a combined area of .147". This decreases volume slightly but gives me a little more pressure. I hope I didn't mottle it up to much. Even with all the calculations I did, I still spent a couple of days running the tank with plain water and parts on string to adjust everything and trying to fine tune.
Any questions on the setup, I'll be happy to answer.
SS
|