Keeping output air pressure constant.

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SUMMARY

The discussion centers on maintaining a constant output air pressure of 1 psi using a Dwyer MPR2-0 air pressure regulator with a variable source pressure ranging from 125 to 175 psi. Users identified that fluctuations in source pressure significantly affect the output pressure, suggesting that the flow rate may be too high or the regulator could be defective. Recommendations include considering a two-stage regulator for better pressure stability and utilizing a Fisher Controls 912N regulator for improved performance. Additionally, incorporating a reservoir tank is advised to dampen pressure variations.

PREREQUISITES
  • Understanding of air pressure regulation and control systems
  • Familiarity with Dwyer MPR2-0 air pressure regulator
  • Knowledge of two-stage pressure regulation
  • Experience with pneumatic systems and reservoir integration
NEXT STEPS
  • Research the specifications and installation of the Fisher Controls 912N regulator
  • Learn about the advantages of two-stage pressure regulators in pneumatic applications
  • Investigate the design and benefits of using air reservoirs in pressure control systems
  • Explore flow rate calculations and their impact on pressure stability in pneumatic systems
USEFUL FOR

Automotive technicians, pneumatic system engineers, and anyone involved in air pressure regulation and control in industrial applications will benefit from this discussion.

xxrusianxx
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Hello everyone, I am new here and just wanted to take this time to say hi. My name is Victor I am an automotive technician from Boston MA,
I'm really glad I came across this Forum it has deffinetly peaked my interest. With that being said... I do have a question.

I am working on a project which requries 1 psi air pressure. My air source is 125 to 175 psi. So far I have obtained a 0-5 psi air pressure regulator (Dwyer MPR2-0) and can succsessfully set it to 1 psi. However, when my source pressure drops or raises it has a significant effect on my output pressure (+/- 2 psi). Question being, how can I keep my output pressure constant at 1 psi with a variable source pressure?
 
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Hmm. That's odd. The output pressure should remain constant as long as the input is greater than the set point. Only thing I can think of is that your flow rate is too high or your regulator is defective. You might also need to use a 2 stage regulator since the source pressure is so much higher than your output.
 
After doing some research I found a different regulator that does a better job at keeping constant pressure.
Fisher Controls 912N
 
If you don't have one already try putting a resevoir (air tank) on the 1 PSI part of your system to act as a damper.
 

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