Flowmeter Impact from Changing Pressure

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SUMMARY

The discussion centers on the impact of increased pressure on the accuracy of a flowmeter calibrated for 25 psi when the pressure is raised to 50 psi. It is established that the flowmeter will not provide accurate readings at the new pressure without a correction factor, as it is specifically calibrated for 25 psi. The type of flowmeter used will determine the extent of the deviation, and users must refer to the manual for calibration procedures, although in this case, the flowmeter is not adjustable for higher pressures.

PREREQUISITES
  • Understanding of flowmeter calibration principles
  • Knowledge of pressure measurement units (psi)
  • Familiarity with gas flow measurement techniques
  • Basic concepts of correction factors in instrumentation
NEXT STEPS
  • Research flowmeter types and their calibration ranges
  • Learn about correction factors for flow measurement at varying pressures
  • Investigate alternative flowmeters suitable for high-pressure applications
  • Study the impact of pressure on gas flow dynamics
USEFUL FOR

Engineers, technicians, and professionals working with gas flow systems, particularly those involved in the calibration and maintenance of flowmeters in high-pressure environments.

formula428
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I have an argon piping system. The pressure is set at 50 psi. Assume no pressure drop. I have a flowmeter that is calibrated to run at 25 psi. Basically, I want to know what the "new" scale will be on the flowmeter as a result of the increased pressure (from 25 to 50 psi).

In other words, if the meter reads 100 SCFH @ 25psi, what would/should it read at 50 psi?
 
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Depends entirely on the type of meter, some will remain correct..
The manual should have the calibration procedure?
 
No, this one unfortunately is calibrated only for 25psi. Any deviation will result in needing a correction factor.
 

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