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33/64" fitting question

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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33/64" fitting question

Unread postAuthor: squnto » Sat Dec 24, 2011 10:54 pm

will this slide valve:

http://www.ebay.com/itm/33-64-Pneumatic ... 5ae3de3c4c

fit into a standing 1/2" fitting? The difference is so small that it just might work...

thanks in advance!
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Unread postAuthor: JDP12 » Sat Dec 24, 2011 11:10 pm

it's equivalent to 1/4" BSPP thread.
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Unread postAuthor: squnto » Sat Dec 24, 2011 11:16 pm

American fittings are npt, correct? is bspp at all compatible with npt fittings, or would i have to buy some crazy ass fitting to bridge the two?
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Unread postAuthor: JDP12 » Sat Dec 24, 2011 11:23 pm

ya america typically uses NPT. BSPP and NPT are NOT COMPATIBLE. you will have to get an adapter- www.mcmaster.com sells them.
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Unread postAuthor: squnto » Sat Dec 24, 2011 11:39 pm

thanks mate :)

workin on an all metal semi auto marble gun that this'll be lush for!
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Unread postAuthor: MrCrowley » Sun Dec 25, 2011 1:22 am

JDP12 wrote:ya america typically uses NPT. BSPP and NPT are NOT COMPATIBLE. you will have to get an adapter- www.mcmaster.com sells them.
Well they thread together, you might need to use a bit more teflon tape than usual to get them to seal. At high pressures, epoxy or thread seal may be required for a seal.
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Unread postAuthor: JDP12 » Sun Dec 25, 2011 1:39 am

yes... however the threads on that slide valve are BSPP, so they are parallel threads, whereas NPT are tapered. personally I'd recommend just getting the adapter, as i hate jury-rigging threaded fittings. just my 2 cents.
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