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  1. laura80

    pump trip surge loads

    Hello I am concerned about the following issue. I easily undertand when a valve closes the loads that this produce in pipe. The first loads begins just against the valve that closes and it is propagated upstream the valve, with the wave of pressure. But I do not undertand when a pump trips...
  2. laura80

    swing check valve and surge

    Thank you very much for your answers To summ up the anwer to my questions are: Conslusion of the second question: -The check valve is going to close when the SDV totally close, even though the pump is runnin at nominal r.p.m. To my first question I am not very sure of the answer, is...
  3. laura80

    swing check valve and surge

    Emergency shutdown valve
  4. laura80

    swing check valve and surge

    Sorry, I have to clarify that it is not a security valve. It is SDV valve.
  5. laura80

    swing check valve and surge

    Hello everybody I need some help about two questions: 1) Is posible for a swing check valve to close before the flow reverses because of the dropp of fluid velocity? I think it is not posible, but some of my collegues think it is. 2) I have the following instalation: Pump(centrifugal) -...
  6. laura80

    How Bosfluids calculates unbalance forces

    Thank you very much BigInch for your answer. In the manual I didn't see anything about it. I will run a test job and try to check when i have a litle more time at work. Thank you very much.
  7. laura80

    How Bosfluids calculates unbalance forces

    Hello Id like to Know what formula aplies Bosfluids to calculate unbalance force produce by water hammer in straight section of the pipe system. I know the sofware is based in characteristic method to find the the velocity of the wave of presure produced by water hammer, but I want to know the...
  8. laura80

    Help with bosfluids

    I found out the mistake!!! I had an element "orifice" next to other one, and this resulted in a non linear working of the model, this was the reason of a bad operation of my model. Thanks every one for your help.
  9. laura80

    Help with bosfluids

    Off course the velocity changes if i close the valve, but i am saying that i select the option transient but i do not make the valve closes. I kipt the position of the valve 100 per 100 open all the time, and the flow changes, and produces unbalance forces...i do not understand...
  10. laura80

    Help with bosfluids

    Hello I am studying the surge because of close of valve. I need to calculate the unbalance force in the pipe, when a valve closes in 30 sec. I get a steady state. Then I select the option "transient", but I do not anything, I let the valve still openned, and the flowrate and the pressures...
  11. laura80

    trial version of bos fluids

    I Know, but I don't trust this site. This site requires your credit card dates, I have already tried in this addres. Thanks
  12. laura80

    trial version of bos fluids

    Does anybody Know where can I find a legal trial version of Bos fluids?

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