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What could a "NBSF" pressure fitting be?

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tluxon

tluxon

Mechanical
Jan 11, 2001
107
I'm designing a portable field standard that will measure fluid pressures up to 40,000 psi. The Marketing guys have suggested a pressure fitting interface of 1/4" NBSF for the units that are rated between 15K psi and 40K psi. I've never heard of this type fitting and have been unable to turn anything up in searches for it.

Is there an obscure pressure fitting type by that description? Why would they want to use an obscure type (all our other high pressure instruments use HIP fittings for the interface of those pressures)? Could they have incorrectly transposed some of the letters?

Thanks for any help you can give -

Tim
 
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tluxon, Go back to the marketing guys and have them define what it is and to find a manu'f to contact you. 1/4" NBSF?
Could it be a 1/4" Nominal Brand Specification Failure?

saxon;)
 
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NBSF = Never Buy Suspicious Fittings? First mistake is using 'pressure fitting' and 'marketing guys' in the same sentence, haven't you ever read Dilbert? ;-)

Only thing I've heard of even close is the National Building Specifications, some sorta setup in Britain where they have a central library of construction specs that can be used to build project specs from.
 
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tluxon-

I'll throw out a guess: Nominal Pipe Size, Female or NPSF. Easy for some marketing weenie to hear "NBSF". I imagine this would be a threaded connection - but for such high pressures???

jt
 
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jte,

"NPSF" actually may be a good guess, nevertheless this abbreviation typically stands for "National Pipe, Straight, Fuel".
 
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Unless the marketing guys can define a source they may be blowing smoke or have their acronyms mixed up. Look at the different interfaces that are used in the gauge industry for high pressure gauges. 40,000 psi is a dangerous pressure, it would be better to contact people who sell products that handle that pressure than to listen to marketing.
NTPF is a dry seal pipe thread, and will work at higher pressures, but I don’t think it would be the best choice at your pressure. Be sure to test what ever you chose.
 
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Check high pressure hydraulic piping/valve manufacturers like Autoclave & Butech. They are interchangable. Butech is cheaper but their product selection is limited. They have angle valve but not straight valve. Note the difference service classification between low, medium & high pressure & the special required threaded connection for each class.
 
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Let me also try to have a wild guess.

Will it mean '1/4" Nominal Bore size, Female', similar as jte suggested, or
'1/4" Nominal Bore, Single Flanged' for high pressure connection.

Please tell us the answer after you clarified with your Marketing guys
 
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