Is this 1/4" BSP?

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Goats spudz
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Sun Oct 02, 2011 9:21 am

This website sells Popoff valves Cheap But there thread sizes make no sense http://www.sourcingmap.com/air-compress ... 43068.html
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Brian the brain
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Sun Oct 02, 2011 9:25 am

0.5" means 1/2"

So it's half inch...
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Goats spudz
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Sun Oct 02, 2011 9:55 am

Brian the brain wrote:0.5" means 1/2"

So it's half inch...
ok thanks <3 so 0.25 is 1/4". although Thread type? bsp-npt,,,
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DYI
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Sun Oct 02, 2011 10:24 am

Actually, if the thread's diameter is 0.5", it isn't any NPT or BSP thread. Also, if the thread's outer diameter is a meaningful quantity without any other qualifier, it isn't a tapered thread at all, but a straight thread.

The closest pipe comes to having a 1/2" diameter is 1/4" BSP pipe, which is .531" external diameter (plus or minus some tolerance, of course). 1/4" NPT pipe is a close second, at 0.540".

This site doesn't offer enough specifics on the thread to display any hint of knowing what they're talking about. I wouldn't recommend doing business with them.
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Goats spudz
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Sun Oct 02, 2011 10:30 am

DYI wrote:Actually, if the thread's diameter is 0.5", it isn't any NPT or BSP thread. Also, if the thread's outer diameter is a meaningful quantity without any other qualifier, it isn't a tapered thread at all, but a straight thread.

The closest pipe comes to having a 1/2" diameter is 1/4" BSP pipe, which is .531" external diameter (plus or minus some tolerance, of course). 1/4" NPT pipe is a close second, at 0.540".

This site doesn't offer enough specifics on the thread to display any hint of knowing what they're talking about. I wouldn't recommend doing business with them.
Ok thanks DYI, but i cant find any popoff valves available in the UK :violent2:
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SpudBlaster15
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Sun Oct 02, 2011 10:46 am

It's likely to be 1/4" NPT, as this is the most common thread found on air compressor relief valves in the US.

Whoever designed that page appears to know nothing about pipe threads (Or pneumatic systems in general), so I'd heed DYI's warning and avoid purchasing from them.
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Goats spudz
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Sun Oct 02, 2011 12:42 pm

I need help locating a relief valve that is 1/4" bsp and i cannot find one for under £10,,, can anyone help me because i would hate to pay £40 plus shipping for a flimsy valve. and finally does anyone know how to make one as a last resort and i have access to a machine shop :D
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nathanhd123
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Sun Oct 02, 2011 2:24 pm

I buy all my pneumatic parts from Airline Pneumatics.http://www.airlines-pneumatics.co.uk/

Here are there pressure relief valves. Cost around £25. http://www.airlines-pneumatics.co.uk/we ... de=S070140
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