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Keeping output air pressure constant.

  1. Mar 7, 2012 #1
    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?
     
  2. jcsd
  3. Mar 8, 2012 #2
    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.
     
  4. Mar 10, 2012 #3
    After doing some research I found a different regulator that does a better job at keeping constant pressure.
    Fisher Controls 912N
     
  5. Mar 11, 2012 #4
    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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