Steve in nc, I have yet another question

Steve in nc, I have yet another question

Joined: April 28th, 2010, 12:23 am

November 23rd, 2011, 5:03 pm #1

A well known machinst told me that under hpa conditions , the 760-417 valve should be reinforced into its current resting area, does that mean it needs a better seal to the comp tube, needs to br drilled tapped and screwed to the comp tube , or both which is what im now planning to do??

p.s i would have asked him but i know for a fact he is too busy for banter.
Last edited by robnewyork on November 23rd, 2011, 5:06 pm, edited 1 time in total.
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Joined: November 28th, 2002, 6:26 pm

November 23rd, 2011, 5:58 pm #2

...has a vocabulary all his own and therefore only he can explain what it means.

Steve
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Joined: March 1st, 2002, 12:22 am

November 23rd, 2011, 6:01 pm #3

A well known machinst told me that under hpa conditions , the 760-417 valve should be reinforced into its current resting area, does that mean it needs a better seal to the comp tube, needs to br drilled tapped and screwed to the comp tube , or both which is what im now planning to do??

p.s i would have asked him but i know for a fact he is too busy for banter.
Pinning the valve

 


dr_subsonic's pneumatic research lab

the Lunatic Fringe of American Airgunning
Southwest Montana's headquarters for Airgunning Supremacy
Proud Sponsor of team_subsonic
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Joined: April 28th, 2010, 12:23 am

November 23rd, 2011, 6:39 pm #4

...has a vocabulary all his own and therefore only he can explain what it means.

Steve
that was my odd vocab, not his.
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Joined: April 28th, 2010, 12:23 am

November 23rd, 2011, 6:39 pm #5

Pinning the valve

 


dr_subsonic's pneumatic research lab

the Lunatic Fringe of American Airgunning
Southwest Montana's headquarters for Airgunning Supremacy
Proud Sponsor of team_subsonic
yep.nt
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Joined: November 28th, 2002, 6:26 pm

November 24th, 2011, 12:53 am #6

that was my odd vocab, not his.
...is zero except for the pressure drop of the checkvalve. So the strength of the retainment can be similarly wimpy and still be safe.

But if you convert to HPA, then pressure acts on the entire frontal area of the to create an astronomically higher 100s or 1000s of pounds of force trying to launch the valve out the back end of the tube and (potentially) into the shooter's smile.

Hence the required strength of retainment needs to be similarly astronomically higher.

If you want to keep smiling.

Steve
Last edited by pneuguy on November 24th, 2011, 12:54 am, edited 1 time in total.
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Joined: April 28th, 2010, 12:23 am

November 24th, 2011, 1:42 am #7

just confirming my initial thought, ill bolt it down as planned.
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