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Nutter-Bdh Valve Size

tower hydraulics tray type of valves bdh size area

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#1 Nikolai T

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Posted 24 June 2017 - 02:34 AM


I have to perform hydraulic calculation of trayed column in HYSYS. There are trapeziporm valves. The nearest type of valves I've determined as Nutter-BDH. Is it correct to calculate number of BDH valves based on it's free area (area under valve). Can I calculate the area as Leg Lenght * Lenght valve*2 for this purpose?

Attached File  BDH.JPG   23.07KB   5 downloads

#2 Bobby Strain

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Posted 24 June 2017 - 09:08 AM

You need to choose equivalent area that most closely matches vapor pressure drop across the tray. Check out this page.

http://www.koch-glit...alve-types.aspx. The correct spelling is trapeziform. Koch-Glitsch has a free tray rating program that might have valve types closer to the one you need.



Edited by Bobby Strain, 24 June 2017 - 09:13 AM.

#3 Nikolai T

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Posted 25 June 2017 - 06:24 AM

Thank you Bobby

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