I have been searching through page after page of Google results without much luck. At one time I had an automotive math book which included a few standard for mulas for flow through tubes and orifices (air, gas, brake fluid, etc). Do any of you engineer types know where I can find the necessary info to determine hydraulic fluid (ATF) flow through an orifice? One key figure that is alluding me is the K value of ATF which appears to be required for all of the formulas I have found so far.
