Gravity flow through 500 micron basket.

[rQb]

Hi,

I need to calculate what flow rate is possible to achieve through a 500 micron mesh basket. Gravity scenario as Basket will be located in a floor drain.

I imagine head over the outlet and surface area opening of the basket but not sure which formula to use.

Thanks in advance

K

 

[Latexman]

Consult the vendor (or a vendor) literature.

Good luck,
Latexman

To a ChE, the glass is always full - 1/2 air and 1/2 water.

 

[bimr]

The manufacturer should have flow charts. There is no method to accurately calculate the head loss.

 

[LittleInch]

Just remember that the dirty state will generate a lot more head loss than clean....

At 0.5mm hole size I can't see a floor drain lasting very long before it gets very clogged and the head loss for any decent flow rate such that you will have a flood.

the odd plastic bag also has a detrimental effect....



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Also: If you get a response it's polite to respond to it.

 

[PEDARRIN2]

From MIFAB, (

http://www.mifab.com/Catalog/Library/f-selection-guide.pdf)

Q = 448.2 • Cd • A • (2 • g • h)^0.5

Q = Flow rate (Gallons per Minute)
Cd = Discharge Coefficient = 0.6
A = Free area (open area) of grate (ft/s^2 )
g = Acceleration (32.2 ft/s^2 )
h = Head above the floor (ft)

 

[IRstuff]

I'm surprised there's any flow at all. 500 micron is pretty tiny, given the surface tension of water.

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[Latexman]

500 micron is huge for pure water. That's 35 Mesh. It's tiny for the trash that's in the water though.

Good luck,
Latexman

To a ChE, the glass is always full - 1/2 air and 1/2 water.

 

[rQb]

Thanks all.

Think a physical test best option.

 

[georgeverghese]

There are vendor flow vs head loss curves for these basket strainers. To this estimated pressure drop, include a multiplier to account for fouling of the strainer - I typically use 1.0 for clean service, 2.0 for light fouling, and 3.0 for fouling.