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Feedwater Heater Vent sizing 1

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jsteverm

Mechanical
Joined
May 30, 2001
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20
Location
US
I'm looking for a rational explanation of the orifice sizing for the operating vent of feedwater heaters. I have seen sizing criteria stated as 0.5 to 1.5 % of extraction steam flow but I don't know where it comes from. HEI doesn't have a criteria that I could find.
 
The last sentence of 2.13 of HEI Standard, page 11, might be the answer to your question.

Regards,

 
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