Generically... we set the KL systems at 13 gpm per ft2. We also do extensive testing in clear tanks to determine the backwash/bed expansion rates based on actual test results, not computer simulations. Most companies really try to stretch their numbers to make their media look easier to use than it is. We bring KL in by the container load and have determined that 8-10 is probably sufficient but in our opinion, 13 gpm is better for a "generic" setting. Generic refers to the water temperatures that are considered most common in the US. typically 60-65 degrees. Please don't start bombing me with your water temperatures and how far off we are.
I know that water in Maine, Alaska, upstate New York is much lower and that the natural wells in Florida are always at 76 degree, and the springs in Hawaii are 84... we simply had to set a generic point that would accommodate the widest variable possible.
Yes, the 2510 should work but it is not an ideal valve for this application. Do you already have the valve and are simply trying to reuse it?