Calculation of the pressure drop across a flow conditioner uses basic fluid dynamic principles and experimental data from different fluid scenarios. There is no typical pressure drop value as the pressure drop behavior is always fluid application dependent; changes in flow velocity, viscosity and density can all cause large changes in the resulting values. The pressure loss coefficient (K) is also dependent on the process conditions of the application, but cannot be theoretically calculated using textbook equations; it must be experimentally determined through testing for each unique element geometry.

Pressure Drop Quation


  • K = Pressure loss coefficient.
  • ΔP = Pressure drop across a section of pipe or a fitting, Pa.
  • ρ = Bulk fluid density, kg/m3
  • V = Bulk fluid velocity, m/s.

Pressure Drop K FactorSample Flow Conditioner K Factors vs Pipe Reynolds Number.

CPA can perform a custom pressure drop calculation for any flow conditioner upon request. As these calculations are dependent on the fluid properties of the metering scenario, the process conditions will be required to carry out the calculation. Please complete and submit the attached pressure drop request form in order to receive the most accurate calculation results.

Sample Pressure Drop Values, Methane & Water

Pressure Drop 500 PSI & 60F

Sample Pressure Drop Values, Light Oil & Heavy Oil

Pressure Drop Heavy Oil vs Light Oil

For further information, do not hesitate to contact our experienced sales representatives, who will be able to help you choose the correct product for your specific needs.

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CPA Flow Conditioner Pressure Drop Request Form

When submitting, please include any specification sheets that describe application process conditions. Please note that the pressure drops calculations assume fully developed flow. Installation effects, swirl or any other type of flow disturbance can change the flow conditioner behavior, K factor and pressure drop calculation results. If a more detailed calculation is required, please contact CPA to discuss modeling the meter station using computational fluid dynamic analysis.

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