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  1. GGriffin

    Tank Drain Flow Rate Into Pipe

    Yes, it comes out of the tank and ties in to other drain lines but the actual horizontal distance is ~10'. Equivalent length is probably closer to 50' with the elbows and tees.
  2. GGriffin

    Tank Drain Flow Rate Into Pipe

    LittleInch, It's a real question, and unfortunately I can't wait until it's all installed to measure how fast it drains [upsidedown] You gave me some good leads and maybe over the holiday's I'll be able to investigate and see if I could figure this out, but for now my only option is over...
  3. GGriffin

    Tank Drain Flow Rate Into Pipe

    LittleInch, Sketch is attached. Drain end is open to atmosphere inside sump tank. I'm not sure how you decide if the pipe is full or not without knowing which equation governs flow? Can you explain what steps you'd take a bit more? Equations would help as well...
  4. GGriffin

    Tank Drain Flow Rate Into Pipe

    So I know this is something that's been asked before, but I haven't seen any real considerations for the pipe that a tank will drain into. I have a 2.5" drain line out of the side of a tank, so using Q = a*Cd*(2gh)^0.5; a = 5.45 in^2 = 0.00352 m^2 Cd = borda outlet = 0.51 h = 2m So, Q =...
  5. GGriffin

    Differential Pressure Switch - Range Calculation

    Chas, Thanks for the reply. You're right, I meant downstream from the exhaust grille in the original post. It's an inline exhaust fan so downstream from the grille is the proposed pressure sensor, between the exhaust grille and the fan, and downstream from the fan is the proposed sail switch...
  6. GGriffin

    Differential Pressure Switch - Range Calculation

    Thanks for the reply Mint. I didn't work on this project prior to this so I can't say for certain the methodology behind the pressure differential switch selection, considering there is a sail switch downstream of the fan. I will confirm. But aside from that - do you have any input on the...
  7. GGriffin

    Differential Pressure Switch - Range Calculation

    Hi all, I've been tasked to select a differential pressure switch for an exhaust application that only needs to determine whether there is airflow or not (no airflow signals an alarm). The low pressure input will be in the duct (perpendicular to airflow), the high pressure input will be...

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