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  1. 2ndThermoLaw

    How do Anti-Siphon Valves Work

    Hi all, How do anti siphon valves work? I'm told that you use these to shut-off a flow, when the flow is higher than normal. I'm googling a schematic to see how these work, but luck so far. I've come across posts in other forums where people have used anti-siphon valves on a fuel tank, with...
  2. 2ndThermoLaw

    Good Petroleum Engineering Book?

    I have just started in the industry with little Engineering experience and it's also been a while since college. Could anyone recommend a good, practical book(s) that covers fundamentals of PE, from well head to the sales pipe? Basically looking to get the lingo and refresh on the basics on...
  3. 2ndThermoLaw

    Adding Connection node to shapes

    Hello all, I basically would like a rectangle box (such as process block) with connection nodes along the edges. At the bottom edge (or one of the edges), as opposed to a single connection node (as is the case with process block/shape), I would like to separate connection nodes. This is so...
  4. 2ndThermoLaw

    Engineering Diagrams in Word

    Hello All, has anyone come across any tools (be it an extension in Word or external program) to draw 2-D engineering diagrams (eg gears, free body diagrams.... the kind you hand sketch) easily and quickly. Atm I'm using stuff in Word and Paint or projected views from 3d drawing... pain at times...
  5. 2ndThermoLaw

    NAS1097 vs MS20426

    Hello, can these be substituted for each other? ie. could MS20426 be installed in lieu of NAS1097 and vice versa?
  6. 2ndThermoLaw

    PWM question

    Hi With the clark/park control strategy for a permanent magnet motor, what is the relationship between the commanded phase voltage to PWM and applied phase voltage. is that a simple gain of (Amp of Railvoltage/Amp of pulse)? thanks

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