Pressure regulator affect flow rate through pipe?

AI Thread Summary
A pressure regulator downstream of a pipe will restrict flow if its setpoint is lower than the upstream pressure, potentially decreasing the flow rate. The relationship between pressure and volume, as described by the equation P1V1 = P2V2, suggests that as pressure drops, the volume of compressed air may increase due to expansion. However, the overall flow rate can still be affected negatively by the regulator's restriction. Additionally, a throttling valve functions similarly to a pressure regulator by limiting flow based on its settings. Understanding these dynamics is crucial for optimizing compressed air systems.
yun
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Good day to all, was wondering how a pressure regulator doownstream will affect the flow rate of compressed air through a pipe. Anyone has any insights on this? the pressure regulator is to reduce the downstream pressure but I'm really confused how the flow will be affected. For instance, will the regulator restrict flow through the pipe and cause a decrease in flow rate? Or will the increased speed of the compressed air make up for it.
The supply of the compressed air is from a fixed speed air compressor.

Also, by using a throttling valve, does this have the same effect as a pressure regulator?

Thank you very much, any ideas and opininons are very welcome!
 
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A regulator (or any other valve) will restrict flow if the pressure setpoint is below what the pressure would have been without the regulator there.
 
Hi Mr watters, thanks for your reply!
Could you explain to me why this is so though? Does the equation P1V1 = P2V2 apply here? As the pressure drops, will the volume of the compressed air increase due to expansion?

Thanks again!
 
russ_watters said:
A regulator (or any other valve) will restrict flow if the pressure setpoint is below what the pressure would have been without the regulator there.
Is flow rate at inlet of pressure regulator ( not relief valve) equal to flow rate at outlet ?
 

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