I am trying to size an orifice to place on an outlet of an air vent line. The reason for this is that I am installing a noise suppressing muffler, but it is only rated for 300 psig. Since I am venting a line that will be pressurized to 1600 psig, I'd like an orifice restrictor in order to reduce the outlet pressure to something less than or equal to 300 psig. My question is how can I properly size this orifice to allow this much of a pressure drop, without getting too overly complicated in my approach?(adsbygoogle = window.adsbygoogle || []).push({});

My first thought was to use the equation for choked flow to figure out my flow rate through the orifice. If this flow rate is less than my maximum allowable flow rate specified by the muffler (400 scfm), then I at least have that much taken care of. But how can I verify that I maintain <300 psig on the downstream side of the orifice?

Thank you in advance.

Mike

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# How do I calculate the pressure drop of air across an orifice?

Loading...

Similar Threads - calculate pressure drop | Date |
---|---|

Pressure drop calculation | Apr 5, 2017 |

Calculate theoretical static pressure drop in moving fluid | Nov 9, 2016 |

Calculating pressure at pressure relief valve outlet | May 18, 2016 |

Calculate the pressure drop of air across an orifice? | Oct 12, 2015 |

**Physics Forums - The Fusion of Science and Community**