Flowmeter Impact from Changing Pressure

In summary, the conversation is discussing the impact of increased pressure on a flowmeter that is calibrated to run at 25 psi. The question is what the "new" scale on the flowmeter will be at 50 psi and if a correction factor is needed. The answer depends on the type of meter and the manual should have the calibration procedure. However, in this case, the flowmeter is only calibrated for 25 psi and any deviation will require a correction factor.
  • #1
formula428
6
0
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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  • #2
Depends entirely on the type of meter, some will remain correct..
The manual should have the calibration procedure?
 
  • #3
No, this one unfortunately is calibrated only for 25psi. Any deviation will result in needing a correction factor.
 

FAQ: Flowmeter Impact from Changing Pressure

1. How does changing pressure affect a flowmeter's accuracy?

Changing pressure can have a significant impact on a flowmeter's accuracy. This is because pressure changes can affect the density and viscosity of the fluid being measured, which in turn affects the flow rate. In addition, changes in pressure can also cause disturbances in the fluid flow, resulting in fluctuations in the measured flow rate. Therefore, it is important to carefully consider the pressure conditions when using a flowmeter to ensure accurate measurements.

2. Can changing pressure damage a flowmeter?

In some cases, changing pressure can cause damage to a flowmeter. For example, sudden and extreme pressure changes can cause mechanical stress on the flowmeter, leading to cracks or other structural damage. In addition, pressure changes can also cause the flowmeter to malfunction or provide inaccurate readings. It is important to consult the manufacturer's guidelines and specifications to determine the safe operating range of a flowmeter and avoid damaging it.

3. What is the best way to compensate for pressure changes when using a flowmeter?

The best way to compensate for pressure changes when using a flowmeter is to use a pressure-compensated flowmeter. These flowmeters are specifically designed to account for changes in pressure and provide accurate readings regardless of the pressure conditions. In addition, regular calibration and maintenance of the flowmeter can also help ensure accurate measurements even with changing pressure.

4. How do different types of flowmeters respond to changing pressure?

The response of flowmeters to changing pressure can vary depending on the type of flowmeter. For example, differential pressure flowmeters are more sensitive to changes in pressure, while positive displacement flowmeters are less affected. In addition, the response can also vary based on the specific design and operating principle of the flowmeter. It is important to consult the manufacturer's guidelines and specifications to understand how a specific flowmeter responds to pressure changes.

5. How can I minimize the impact of pressure changes on flowmeter measurements?

There are a few ways to minimize the impact of pressure changes on flowmeter measurements. One way is to use a pressure-compensated flowmeter, as mentioned earlier. Another way is to maintain a steady pressure by using pressure regulators or other control measures. In addition, regular calibration and maintenance of the flowmeter can also help ensure accurate measurements even with changing pressure. It is important to carefully consider the pressure conditions and take appropriate measures to minimize their impact on flowmeter measurements.

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