Reduction Orifice sizing for desired pressure drop

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SUMMARY

This discussion focuses on sizing a reduction orifice for achieving a desired pressure drop in a fluid system. The parameters provided include a pipe diameter of 2.5 inches, an inlet pressure (P1) of 125 PSI, a required outlet pressure (P2) between 75-85 PSI, and a flow rate (Q) of 1020 gallons per hour with water at 90°F. The importance of the discharge coefficient in determining the orifice size is emphasized, along with the recommendation to consult manufacturer catalogs for specific valve performance graphs.

PREREQUISITES
  • Understanding of fluid dynamics principles
  • Familiarity with orifice sizing calculations
  • Knowledge of discharge coefficients for valves
  • Experience with pressure drop calculations in piping systems
NEXT STEPS
  • Research orifice sizing formulas, specifically the orifice equation
  • Learn about discharge coefficients and their impact on flow rates
  • Explore manufacturer catalogs for valve performance graphs
  • Investigate pressure drop calculations in fluid systems
USEFUL FOR

Engineers, fluid dynamics specialists, and anyone involved in the design and optimization of piping systems requiring pressure regulation and flow control.

smotta
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Good afternoon,

I am trying to size a reduction orifice for a desired pressure drop. I do not need the drop to be specific, since this is just for valve protection and not for metering.

D1 (Pipe) = 2.5"
P1 = 125 PSI
P2 Required = 75-85 PSI
Q = 1020 gal/hr
Fluid = Water, 90 Deg F

Basically, I just need to know what size orifice I would need to, If possible, get the desired output pressure.

Thank you in advance, I hope I have provided the required information.

-S
 
Engineering news on Phys.org
Hi,

it's not an easy question because you need some valve parameter such as the discharge coefficient, that sometimes is not provided. The best thing you could do is to check on catalogues you will get some graphs where you can get the right valve for your case.

Anyway, check in this link (http://en.wikipedia.org/wiki/Orifice_plate) the formula 2.

Cheers
 

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