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[deltaChe]

I have an orfice detla P problem which is downstream condesnate return pump.
I did the P-67711A(condensate return pump) hydraulic calculation
and got the discharge pressure = 12 barg. And, I also got delta P=2 barg of
the 677-LV-003 (condesner hotwell level control valve). If the level goes low
, this can result in damaging the condensate pump(P-67711A). If the water level
goes high, the pressure in the condenser will increase, which can result in damaging
the trubine.
My question is the FO-004 (red cloud in the secend attached pdf file) downstream
of P-67711A. I found the delta P=1 barg of FO-004 from liciencer datasheet
which seems incorrect because the discharge pressure=12 barg of P-67711A and
downstream of FO-004 is about 2 barg.
Could any master give me some help.
Thank you very much.

Edited by hswang2, 17 June 2010 - 06:59 AM.

[fallah]

Why do you think the discharge pressure of the pump (the point at pump discharge) should be equal to pressure at upstream of FO (the point may lacated at a considerable distance/level from the pump discharge)?

If you trust your hydraulic calculation and have concluded that the licensor is wrong about the delta P across FO, why don't you clarify the issue with the licensor?