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  • Users: JJJ2000
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  1. JJJ2000

    Instrument Air Dump / Shutdown System

    All, I have worked in several plants that have a hardwired Instrument-Air-Dump switch. In every case the plant was extremely uncomfortable with the thought of actually using this system as you might imagine. One of these plants was a large hydrocarbon processing plant with a full-fledged SIS...
  2. JJJ2000

    Instrument-Air-Dump Switch - Required?

    All, I have worked in several plants that have a hardwired Instrument-Air-Dump switch. In every case the plant was extremely uncomfortable with the thought of actually using this system as you might imagine. One of these plants was a large hydrocarbon processing plant with a full-fledged SIS...
  3. JJJ2000

    Rules for sizing anti-siphon holes? - Part 2

    thread378-293910 All, It has been some time since I posted this question (see the above thread), but in the meantime I stumbled across a different solution to this problem. Somewhere I found the suggestion to use a long piece of angle iron or even just a long rod to connect the nozzle to the...
  4. JJJ2000

    Rules for sizing anti-siphon holes?

    Hello All, I am trying to find some rational for sizing an anti-siphon hole on a dip tube into a vessel. The fluid is approximately 10,000 cP and flowing in an 8" pipe. I have read threads on here suggesting everything from 1/4" to 1/2" holes for this purpose. The vessel is a true ASME...
  5. JJJ2000

    Waukesha Universal vs Discflo Pump

    Hello All, Does anyone have the knowledge to make a good comparison of these two pumping Technologies? I am considering using a Waukesha Universal pump or a Discflo pump for the following application: I know this group likes specifics so here goes: flow rates around 100 gpm, head around 200...

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