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Arunvenkatesh
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Join Date: Aug 2012
Posts: 1

Boiler Feed Pump

08/22/2012 1:47 AM

can any one tell, whether the line size of balancing leak off line in BFP have any significance.

If it so, how to select the line size
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#1

Re: Boiler feed pump

08/22/2012 4:42 AM

<...how to select the line size...>

Keep the average velocity in it between 1 and 3m/s.

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Satish Menon
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Join Date: Aug 2012
Posts: 35
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#2
In reply to #1

Re: Boiler feed pump

09/02/2012 3:37 AM

I would size the leak -off to be about 10% of rated flow so that the temperature rise from suction to delivery in the feedwater does not exceed 9 deg F or about 4 deg C.
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