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kumskip
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Join Date: Apr 2008
Posts: 15

Double Block and Bleed Valves

03/17/2013 11:39 PM

We need to install double block and bleed (dbb) valves before (receiving line 10" ) and after (delivery line 8") of a fuel oil storage tank. What type of dbb valve should I install: dbb plug valve, dbb ball valve or dbb gate valve?
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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: Double Block and Bleed Valves

03/18/2013 5:28 AM

That would depend upon the Client's applicable piping standards in the first instance, and economics in the second.

Ball valves in 10in lines tend to be the highest value option in terms of purchase price and butterfly/wafer valves the lowest.

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