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Calculate valve loss coefficient

  1. Nov 12, 2012 #1
    Hi, I would like to experimentally determine the flow loss coefficient (or similar performance measure if another is suggested) over the various positions of a 4 way rotary valve (for instance, fully open, 50% open etc). The final outcome would be a specification on the positional accuracy (or tolerance in degrees) of the driving mechanism that rotates the valve.

    In order to conduct the experiment, I have the following components:
    1) Two pressure sensors (these would be tee'd off from the main flow lines, one upstream and one downstream from the valve), and;
    2) A flow meter (this would be positioned inline and downstream from the valve).

    The system fluid is water.

    Would the following arrangement be a suitable setup? Also, in measuring the upstream and downstream areas, would they be taken at the valve, in the flow line or at the port on the pressure sensor?

    If anything else is required, please let me know. Thanks.
  2. jcsd
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