Oxygen bottle replacement

[PprophetBirdman]

My oxygen bottle has timed out and needs replacement and the regulator overhauled. Are there any maintenance locations I can fly into for this? I’m located in KY.

 

 

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[LANCECASPER]

1 hour ago, Rizvon said:

 

My oxygen bottle has timed out and needs replacement and the regulator overhauled. Are there any maintenance locations I can fly into for this? I’m located in KY.

 

Why does it need to have the regulator overhauled? It should have the boss seal replaced when the bottle is replaced, but if someone is telling you to have the regulator replaced without looking at it, it doesn't necessarily have to be overhauled. If the regulator doesn't leak I wouldn't do it.

https://www.aircraftspruce.com/catalog/pspages/cylinderaerox2.php?clickkey=9053869

You need either the -3 or -4 depending on which size you had to begin with. Any shop that works on Mooneys that has had experience changing these out should be fine. I would ask though if they've had experience.

[Marc_B]

https://www.aircraftspruce.com/catalog/pspages/cylinderaerox2.php

I've got a Kevlar composite wrapped aluminum cylinder.  Half the weight, but unfortunately it's 15 year vs 24 year service life...of course it's 5 year hydro testing (vs Q 3 years for steel cylinders).  Guess it depends on what's most beneficial with your calculations...

[PprophetBirdman]

Yes, I have the Composite bottle 115.7 cu ft capacity. The bottle hasn’t been hydro tested in 15+ years. I believe it’s a DOT reg to have the regulator overhauled at tank replacement.


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[GeeBee]

Call "the oxygen lady"

https://www.aviationoxygen.com/?https%3A%2F%2Fwww_aviationoxygen_com&gclid=EAIaIQobChMImYn0vYyr-AIVohXUAR38PADNEAAYASAAEgL8rfD_BwE

 

[M20F]

Jimmy Garrison who frequents here is usually selling out of a batch as well.   

[LANCECASPER]

9 hours ago, Rizvon said:

The bottle hasn’t been hydro tested in 15+ years.           I believe it’s a DOT reg to have the regulator overhauled at tank replacement.

That may work in your favor - the less times that thing comes out the less chance of leaks back there.

 

I have never had the Mooney Factory or a Service Center send my regulator out at tank replacement. In my case it hasn’t even been suggested. If it had been chasing leaks unsuccessfully I could see where that might be wise.

[Guest]

From chapter 5 regarding O2 system maintenance.  Because it’s not chapter 4 I becomes optional for private aircraft owners.

Clarence

 

 

[tls pilot]

3 hours ago, M20Doc said:

From chapter 5 regarding O2 system maintenance.  Because it’s not chapter 4 I becomes optional for private aircraft owners.

Clarence

 

what are you indicating regarding Chapter 4 and 5 and what is optional? 

[Guest]

9 hours ago, tls pilot said:

what are you indicating regarding Chapter 4 and 5 and what is optional? 

The attachment didn’t take earlier.  It’s there now.

Clarence

[carusoam]

On 6/13/2022 at 10:18 PM, M20F said:

Jimmy Garrison who frequents here is usually selling out of a batch as well.   

@jgarrison

+1 for Jimmy often has a stock of O2 cylinders…

Best regards,

-a-

[jgarrison]

On 6/14/2022 at 9:53 PM, carusoam said:

@jgarrison

+1 for Jimmy often has a stock of O2 cylinders…

Best regards,

-a-

I just had a couple show up unexpectedly. I wasn't expecting them for a few more months. I will post an update with  my email address in the next few days

[carusoam]

@Rizvon see note from jg above…

-a-

[Ragsf15e]

On 6/13/2022 at 10:21 AM, LANCECASPER said:

Why does it need to have the regulator overhauled? It should have the boss seal replaced when the bottle is replaced, but if someone is telling you to have the regulator replaced without looking at it, it doesn't necessarily have to be overhauled. If the regulator doesn't leak I wouldn't do it.

https://www.aircraftspruce.com/catalog/pspages/cylinderaerox2.php?clickkey=9053869

You need either the -3 or -4 depending on which size you had to begin with. Any shop that works on Mooneys that has had experience changing these out should be fine. I would ask though if they've had experience.

This oxygen stuff is more confusing than it should be... I'm buying a 252/Encore that will need a new O2 bottle at its annual this spring.  I've been researching trying to put in the 115cf bottle for the 77cf bottle that's currently there.... Sounds easy but it's harder than I thought!  The "oxygen lady" told me I have to send in the whole regulator both it and the altitude compensating portion needs tested separately and "recertified" any time the bottle is change ($$).  Next, the part number for the 115cf brackets in the 231 IPC is 803272-10 (I think), but she says that part number comes up as $1500 each.  But she says I could use aftermarket brackets that are $160 each except they aren't in our IPC and they aren't STC/TSO etc, so??

Now I don't believe the reg needs OH just to switch out the tank, but this is crazier than I expected!  Any thoughts?

[LANCECASPER]

1 minute ago, Ragsf15e said:

This oxygen stuff is more confusing than it should be... I'm buying a 252/Encore that will need a new O2 bottle at its annual this spring.  I've been researching trying to put in the 115cf bottle for the 77cf bottle that's currently there.... Sounds easy but it's harder than I thought!  The "oxygen lady" told me I have to send in the whole regulator both it and the altitude compensating portion needs tested separately and "recertified" any time the bottle is change ($$).  Next, the part number for the 115cf brackets in the 231 IPC is 803272-10 (I think), but she says that part number comes up as $1500 each.  But she says I could use aftermarket brackets that are $160 each except they aren't in our IPC and they aren't STC/TSO etc, so??

Now I don't believe the reg needs OH just to switch out the tank, but this is crazier than I expected!  Any thoughts?

I've only changed out one bottle on a Mooney that I owned. Brian Kendrick did not send in the regulator for recertification. It did need a new gasket. We were swapping 115cf for 115cf.

[Schllc]

10 minutes ago, Ragsf15e said:

This oxygen stuff is more confusing than it should be... I'm buying a 252/Encore that will need a new O2 bottle at its annual this spring.  I've been researching trying to put in the 115cf bottle for the 77cf bottle that's currently there.... Sounds easy but it's harder than I thought!  The "oxygen lady" told me I have to send in the whole regulator both it and the altitude compensating portion needs tested separately and "recertified" any time the bottle is change ($$).  Next, the part number for the 115cf brackets in the 231 IPC is 803272-10 (I think), but she says that part number comes up as $1500 each.  But she says I could use aftermarket brackets that are $160 each except they aren't in our IPC and they aren't STC/TSO etc, so??

Now I don't believe the reg needs OH just to switch out the tank, but this is crazier than I expected!  Any thoughts?

If you were to get an o2 conserver you would have no need to upsize the tank.

[N201MKTurbo]

I have 115 cf brackets if you need some.

[Ragsf15e]

14 minutes ago, Schllc said:

If you were to get an o2 conserver you would have no need to upsize the tank.

I will use them as well, but we generally use the airplane as a family of 4 (two 9 year olds), so i think the 115cf might still be good?

[Ragsf15e]

15 minutes ago, N201MKTurbo said:

I have 115 cf brackets if you need some.

That’s awesome!  Thank you.  Ill pm you.

[Schllc]

Just now, Ragsf15e said:

I will use them as well, but we generally use the airplane as a family of 4 (two 9 year olds), so i think the 115cf might still be good?

Well, i can tell you this, i filled my 77cf tank and flew from Florida to Oregon and back with nearly the entire trip at mask or cannulas altitudes. There were only two of us, but when I returned with over 30 hours in the air, i had used less than 1/4 of the o2.  
I have the small bottle in my acclaim and have no interest in changing it. The conservers are a game changer for comfort as well as o2 usage. 

[pkellercfii]

+1 on no need to overhaul the regulator when replacing the bottle. If the regulator is working properly, just install it on the new bottle, and reinstall in A/C. I replaced my 115 cf kevlar bottle in 2023, replacing a 115 cf Kevlar bottle which had turned into flower pots, and simply transferred the regulator.

—Paul

 

[Pinecone]

19 hours ago, Ragsf15e said:

I will use them as well, but we generally use the airplane as a family of 4 (two 9 year olds), so i think the 115cf might still be good?

I have a 115 CF tank and use a Mountain High O2D2.  With 1 - 2 people, my bottle gets filled at annual, it is not very low.

[Ragsf15e]

13 minutes ago, Pinecone said:

I have a 115 CF tank and use a Mountain High O2D2.  With 1 - 2 people, my bottle gets filled at annual, it is not very low.

Yeah, I’ve been basing my plan off of using an O2D2.  The below sheet appears to say that I should expect ~65 “people hours” of O2 (at 15000’) from a 77cf bottle.  With 4 of us, I think that means ~15 hours.  Through the summer, we put ~70 hours on the airplane, so I think id like the bigger bottle… at least that’s what I think this says.

Oxygen-Cylinder-Duration-oldmd.pdf

 

[Schllc]

This usage chart seems extremely conservative.  That being said, I have no experience with the mountain high system. All i have ever used was the precise flite conservers. 
the advantage of these is that they do not require batteries, and each user can adjust their flow to meet their own individual demands. 
I can tell you conclusively that you would have a LOT more that 15 hours out of a small bottle with the precise flite system. This is not anecdotal, it is from five years of actual experience. 
Perhaps someone else with that system can give a review. 

[dkkim73]

If you have to change the tank anyway... 

The O2D2 is pretty miserly, so you might get more time. 

But remember:

"Nothing exceeds like excess"

Esp. With a kevlar bottle the weight might not be a big issue.

If it were me, I'd figure the price breakpoints and factor in convenience. If you want to be creative and techie, look into a hybrid system with a concentrator and bottle... Maybe chat with Aithre. They're also in WA and run by a very smart and innovative couple.