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  • Users: Dryno
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  1. Dryno

    Fiber through Hubs

    Thanks guys, I'm also concerned with the hubs; if they're true hubs and not switches, what about collisions and delay? I've asked the compressor controls vendor (CCC) for some particulars on the communications protocol because the sales guy kept telling us that it was 'high speed'. Also, the...
  2. Dryno

    Fiber through Hubs

    I'm working on a project for a client to upgrade existing air compressors by individual 'slave' controllers on each compressor and one load-shedding master controller. These controllers communicate via a vendor-proprietary protocol over fiber. Since fiber is involved, the client's IT...
  3. Dryno

    Liquid Heating Circuit Control

    I have seen many Therminol or Dowtherm liquid systems use a delta P control loop in parallel with their individual 'circuits', with manual valves and local temperature gauges on each circuit. The delta P control does just that; provides consistent pressure across all circuits. The manual...
  4. Dryno

    Trouble finding Gas flowmeter

    Many thanks for all of the input and suggestions. As it turns out, there are two mistakes in the process data. We (instrumentation) were given the wrong gas density. The mass flow rate was given in PPH, so the incorrect density ( by more than an order of magnitude) resulted in grossly...
  5. Dryno

    Trouble finding Gas flowmeter

    We have an application to measure inert gas flow in a 36" duct at just under 300 SCFH. There is flammable trace dust, which also melts at about 210F. So we're concerned about using a 'hotwire-type' sensor because the dust will melt onto the heated RTD causing measurement errors. We contacted...

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