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PostPosted: Tue Nov 21, 2017 12:24 pm 
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Location: Coalmont BC
How are you planning on anchoring the valve?.... If the aluminum tube is 1/32" wall, it would be 11/16" ID, and the axial load would be over 1100 lbs.... With the full 3/4" ID it increases to over 1300 lbs.... You should design for a load of 3.5 times that without failure.... The typical solution is three 10-32 low-profile, high-tensile SHCSs....

Bob

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PostPosted: Tue Nov 21, 2017 1:22 pm 
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Joined: Wed Oct 29, 2014 10:49 am
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Aluminum tube is 1/16" wall, so the largest diameter exposed to pressure would be 0.625", putting the load at around 920 lbs for 3,000 psi.

Quote:
The typical solution is three 10-32 low-profile, high-tensile SHCSs


That's the plan, standard screw plus one on each side of the tube.


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PostPosted: Tue Nov 21, 2017 7:50 pm 
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Seems a bit strange to give up 30% of your usable volume by sleeving the 2240 tube down instead of just making a new one.... JMO....

Bob

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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal;
Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!

Life is too short to be wasted worrying about the opinions of others.


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PostPosted: Wed Nov 22, 2017 5:35 am 
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Joined: Wed Oct 29, 2014 10:49 am
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rsterne wrote:
Seems a bit strange to give up 30% of your usable volume by sleeving the 2240 tube down instead of just making a new one...


You make a very valid point, a fresh tube is indeed starting to make more sense.


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