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  • Users: jpolise
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  1. jpolise

    Liquid ring vacuum pumps

    Given that the performance curve for a particular vacuum pump is essentially flat, how can one know what the airflow (capacity) is for a given vacuum gauge reading? In this case, there is no air flow instrument that would provide that info. I'm inclined to think that a system curve will have...
  2. jpolise

    Weld on a non ASME coded tank

    I need to weld support fittings onto a 304SS non-ASME coded tank. Is there any issue with regard to tank integrity in doing this? Jack
  3. jpolise

    3-way ball valve Cv

    I have an application where a 4" 3-way ball valve has a Cv of 840 in the 'through' position. Knowing that 3-way plug valves are notoriously poor when it comes to Cv, I found that the 4" plug valve has a value of 160. Since we're having issues with the ball valve I wanted to compare what the...

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