Solution Library

Pressure to Open and Pressure to Close Valves


Explain your choice of a pressure-to-open (normally closed) or pressureto- close (normally opened) valve in the following scenarios:

a) A valve on a cooling water line which is used to cool down a reactor hosting an exothermic reaction

b) A valve on a water line heading to a treatment plant before being released in a river

c) A valve on a gas stream (containing SO2) going to an absorption tower before being released to the atmosphere


This question belongs to physics and discusses about cooling water line used to cool down a reactor hosting an exothermic reaction.

Word count: 124


Download Full Solution


  • HWA

    this is a very good website

  • HWA

    I have 50 questions for the same test your page is showing only 28

  • HWA

    hi can you please help or guide me to answer my assignments. thanks

  • HWA

    hi can anyone help or guide me to my assignments. thanks

  • HWA

  • HWA

    This solution is perfect ...thanks

  • HWA

    Hello Allison,I love the 2nd image that you did! I also, had never heard of SumoPaint, is something that I will have to exolpre a bit! I understand completely the 52 (or so) youtube videos that you probably watched. Sometimes they have what you want, sometimes they don't! However, it is always satisfying when you are able to produce something that you have taught yourself. Great job!Debra 0 likes

  • HWA

    Perfect bank of solution. 

  • HWA

    great !

  • HWA
    Paul Brandon-Fritzius

    thanks for the quick response. the solution looks good. :)

  • HWA
    tina Johnson

    thnx for the answer. it was perfect. just the way i wanted it. 

  • HWA

    works fine.