O ring check

O ring check

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

March 26th, 2012, 3:04 pm #1


I like Trev's idea of the "thru bolt", seems to need a tweak or two though.

How much tuning will the device need? My concern is the need to tear it down to adjust the o ring clearance for proper sealing and opening

Or will it be a matter of just getting it close, and the pressures involved will fine tune itself.....


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Joined: November 28th, 2002, 6:26 pm

March 26th, 2012, 3:14 pm #2

...that no holes are needed? The thread itself is plenty leaky.

As for holding the O-ring preload adjustment, I'm thinking a standard split-ring lockwasher would serve.

Steve
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Joined: December 14th, 2010, 5:08 am

March 26th, 2012, 4:50 pm #3

I like Trev's idea of the "thru bolt", seems to need a tweak or two though.

How much tuning will the device need? My concern is the need to tear it down to adjust the o ring clearance for proper sealing and opening

Or will it be a matter of just getting it close, and the pressures involved will fine tune itself.....


dr_subsonic's pneumatic research lab

the Lunatic Fringe of American Airgunning
Southwest Montana's headquarters for Airgunning Supremacy
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but i'll be trying this soon on a spare 39x valve i have. the inlet hole is 3/32 so all i need is to tap it for a 4-40 screw... im thinking either a 004 or a 003 o-ring should work. i need to order some taps. all i have are a 8-32 and 10-32 tap right now...


then i need a day off work to tinker. so, yeah, someone will definitely get to it before me :P

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

March 26th, 2012, 5:37 pm #4


the 39x was the first place I thought off too......

But I cant visualize what to do with the exhaoust valve spring (ok I can, it rides on the top or the oring screw)... seems to me though the addition/inclusion of the DORCV will have a ripple effect on the rest of the vavle that'll have to be dealt with.  


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

March 26th, 2012, 5:41 pm #5

...that no holes are needed? The thread itself is plenty leaky.

As for holding the O-ring preload adjustment, I'm thinking a standard split-ring lockwasher would serve.

Steve
Have some (unfounded maybe...) concerns that the thing would unscrew/backup under pressure of normal operations and allow the oring to not seal anymore.....

Why couldnt you "cut" a long notch dwon the length of the threads on one side and let that be the "inlet".....

Or is the DORCV gonna be a constantaly upgraded kinda thing as it get loose in the wild.....


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Joined: February 9th, 2006, 10:35 pm

March 26th, 2012, 5:45 pm #6

the 39x was the first place I thought off too......

But I cant visualize what to do with the exhaoust valve spring (ok I can, it rides on the top or the oring screw)... seems to me though the addition/inclusion of the DORCV will have a ripple effect on the rest of the vavle that'll have to be dealt with.  


dr_subsonic's pneumatic research lab

the Lunatic Fringe of American Airgunning
Southwest Montana's headquarters for Airgunning Supremacy
Proud Sponsor of team_subsonic
Maybe use a washer like with the isolated check valve mod (spring and washer trick to reduce pump effort)?

I plink, therefore I am.
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Joined: March 1st, 2002, 12:22 am

March 26th, 2012, 7:11 pm #7


but I dont think there is the step internally on the 22xx/13xx valves......

I'll see if I can make Paint cooperate enough to get a sketch going.....


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

March 26th, 2012, 7:26 pm #8


I know it violates Steve's < $1 worth of parts.... but it fixes an issue I see

<img alt="DORCV.jpg" src="http://www.network54.com/Realm/tmp/1332789872.JPG"> 

 

Drew over the top of Steve's diagram....

The red rectangle on top of the "screw" would be machined on (yes, you'd have to machine the whole part to incorporate it) and the blue sorta sprialled squiggly line is the spring......


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Joined: December 14th, 2010, 5:08 am

March 26th, 2012, 7:51 pm #9

just turn another screw upside-down on top of the other screw....
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Joined: March 1st, 2002, 12:22 am

March 26th, 2012, 8:15 pm #10


D'OH.....

hehehe great solution!!!!


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Southwest Montana's headquarters for Airgunning Supremacy
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