Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

Register Log in
  • Congratulations waross on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: RubenJ
  • Order by date
  1. RubenJ

    Decreasing flow at higher opening of valve

    This is called choked flow, it happens when the pressure at the valve vena contracta(the smallest actual flow area) drops belob vapor pressure, this causes formation of bubbles which restrict liquid flow; in the case of gases, it happens when gas flow reaches sonic flow velocity. :)
  2. RubenJ

    ANSI Class 6 standard origins?

    ANSI has 6 classes to classify valve leakage performance, where Class I is the least strict and Class VI is for the tightest. Class I requires no testing while Class VI requires that leakage throught the valve don´t exceed certain amounts depending of the size of the valve, Test is...
  3. RubenJ

    What type of contol system do I need?

    Why don´t you use a differential pressure transmitter with a simple PID controller, like C100 From ABB. Differential pressure transmitter sends a signal to the controller proportional to Pressure drop between the 2 fluids and it´s more accurate than using 2 sensors. This series of...
Back
Top