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  • Users: JH2015
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  1. JH2015

    Working with electrical/PCB engineers

    Hi all I wondered how you guys deal with passing information to and from any electrical engineers that you work with? In my experience, there are always problems with them understanding the mechanical restrictions we have for the PCB size and shape, and locations of mounting holes etc. Do you...
  2. JH2015

    Basic question about flow and pressure convention

    When a domestic water supply to a building is specified as flow and pressure available at a tap of 1 bar and 1 l/s for example, does this mean A) 1 bar behind tap when closed, and 1 l/s out of tap when opened or B) 1 l/s available when tap is opened, with an added headloss of 1 bar? Unless I'm...
  3. JH2015

    Compressed air consumption convention

    Hi In the industry, is it normal to give compressed air consumption figures as free air (i.e. "normal" or "standard" - atmospheric pressure) volumes rather than an actual volume at the given pressure? For example, if an equipment data sheet states that the air pressure required is 4 barg, and...
  4. JH2015

    Quick check please!

    Hi I've got some measurements that don't add up according to my calcs. Please would someone be kind enough to check and see if I'm doing something obviously wrong, or there's a problem with my measurements? All the info is in the attached sketch. I've measured 1.2-1.4 barg at the T, and am...

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