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OfflinePsyCLown89
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All American Pressure Issues
    #21347345 - 03/01/15 09:27 AM (9 years, 10 months ago)

Hi all,

So I recently got my hands on what seems to be an AA 921 and I made some jars and got around to trying it out and all was going well until I noticed that it was blowing steam, so I went to take a look and the pressure gauge only states 11 PSI as opposed to 15, despite the pressure regulator being set to 15.

Here is a video, I think I have it setup properly?
Also another concern is the metal to metal seal, at the end I zoom in a bit and you can see some bubbles? I put a bit of vaseline around the top edges before sealing it and I cannot seem to get it sealed anymore than it currently is.




Any advice and assistance would be greatly appreciated!

Thanks,
Psy


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OfflinehamloafM
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Re: All American Pressure Issues [Re: PsyCLown89]
    #21347363 - 03/01/15 09:32 AM (9 years, 10 months ago)

It's critical that the lid of the AA is on straight so steam won't come out of the lid like that during operation.


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InvisibleGrey
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Re: All American Pressure Issues [Re: PsyCLown89]
    #21347370 - 03/01/15 09:33 AM (9 years, 10 months ago)

Did you cross cross tighten your clamps?


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OfflinePsyCLown89
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Re: All American Pressure Issues [Re: Grey]
    #21347384 - 03/01/15 09:37 AM (9 years, 10 months ago)

Hmm, I will play with it again when it is done and cool and see if I can get the lid to fit snug without any gaps then.

Although that shouldn't cause the pressure regulator / rocker to go off at 11PSI when it is set to 15PSI? What could be causing that?


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OfflinehamloafM
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Re: All American Pressure Issues [Re: PsyCLown89]
    #21347396 - 03/01/15 09:39 AM (9 years, 10 months ago)

Pressure gauge maybe malfunctioning.  Flick the back of the gauge a few times.  See if that moves the needle.


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InvisibleToadstool5
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Re: All American Pressure Issues [Re: PsyCLown89]
    #21347411 - 03/01/15 09:43 AM (9 years, 10 months ago)

Maybe the pressure is at 15psi and you've got a bad regulator? Good news is that out-grow sells them.

I would think the gasket isn't sealed completely, the release valve is malfunctioning, or the pressure gauge is miscalibrated or sticking at 11. :shrug:

Like the loaf said, try flicking it a few times. I do this for my old meat thermometer and it works fine.


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InvisibleMr. Alien
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Re: All American Pressure Issues [Re: PsyCLown89]
    #21347420 - 03/01/15 09:45 AM (9 years, 10 months ago)

did you put too much petroleum jelly? I also had those problems but mine was at 14 psi. 11 psi is a lot dude.

The bubbles on the weight is normal IME, mine does that too, still get 15 psi. The bubbles on the sides could be that you use to much jelly or that you didn't level correctly the metal to metal seal before of the PC.

Example (I did this on purpose)





You see the gap between the metal to metal seal? In one image the gap is larger than the other one, the metal to metal seal have to be as even as possible.

I had the same problem on the sides:



But after leveling correctly never had the problem again.

Edited by Mr. Alien (03/01/15 09:52 AM)

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OfflinePsyCLown89
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Re: All American Pressure Issues [Re: hamloaf]
    #21347459 - 03/01/15 09:50 AM (9 years, 10 months ago)

Quote:

THE_LOAF said:
Pressure gauge maybe malfunctioning.  Flick the back of the gauge a few times.  See if that moves the needle.




Hmm, flicked it and tapped it a few times and it is not moving.

So now do I get a new gauge and/or a new pressure regulator?
All American seem to think that their pressure regulator is more accurate than the gauge. Since this is a 2nd hand unit I am unsure whether the pressure regulator has anything which could break it / cause it to not not work properly.

It seems that my metal to metal seal is ever so slightly off and is around 2mm or so higher on the side where the bubbles are. I think I might have put a bit too much vaseline on as well after reading this page:
http://www.allamerican-chefsdesign.com/frequently-asked-questions.asp

It wasn't like smothered in it,but it was visable. Perhaps next time I will try using some olive oil instead. I also think I did not place the lubricant high enough (only put it on the straight part, not where it starts to bevel outwards).


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Re: All American Pressure Issues [Re: PsyCLown89]
    #21347563 - 03/01/15 10:17 AM (9 years, 10 months ago)

use vegetable oil to lubricate the rubber sealer

and yes the regulator is defly more accurate than the gauge

either take the gauge to your local branch or send it in to the main corporation

you shouldn't submerge your gauge or let it come into any contact with any liquid maybe the previous owner wasn't aware of this and did this so who knows but I'd just send it in if your unsure about it because it could be a nice hole in your ceiling lets hope not though :stoned:


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OfflinehamloafM
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Re: All American Pressure Issues [Re: PsyCLown89]
    #21347588 - 03/01/15 10:25 AM (9 years, 10 months ago)

Quote:

PsyCLown89 said:
Quote:

THE_LOAF said:
Pressure gauge maybe malfunctioning.  Flick the back of the gauge a few times.  See if that moves the needle.




Hmm, flicked it and tapped it a few times and it is not moving.

So now do I get a new gauge and/or a new pressure regulator?
All American seem to think that their pressure regulator is more accurate than the gauge. Since this is a 2nd hand unit I am unsure whether the pressure regulator has anything which could break it / cause it to not not work properly.

It seems that my metal to metal seal is ever so slightly off and is around 2mm or so higher on the side where the bubbles are. I think I might have put a bit too much vaseline on as well after reading this page:
http://www.allamerican-chefsdesign.com/frequently-asked-questions.asp

It wasn't like smothered in it,but it was visable. Perhaps next time I will try using some olive oil instead. I also think I did not place the lubricant high enough (only put it on the straight part, not where it starts to bevel outwards).



No.  Just use Vaseline.  Yes.  Put the vaseline on the seal (the angled part of the of the top of the vessel).  Fungi perfecti has replacement AA pressure gauges.  When installing your new pressure gauge, BE VERY CAREFUL.  PAY CLOSE ATTENTION that the threads of the new pressure gauge and the threads of sterilizer vessel's closure are aligned PERFECTLY before beginning to tighten the pressure gauge.  AA's are made of cast aluminum, and cast aluminum is VERY bendable/mutable.  Any miscalculation made in the making sure that the threads are lined up evenly will result in the stripping of the pressure gauges and sterilizer closure's threads.


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InvisibleToadstool5
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Re: All American Pressure Issues [Re: hamloaf]
    #21347855 - 03/01/15 11:41 AM (9 years, 10 months ago)

Quote:

2mm or so higher on the side where the bubbles are.




Thats where your pressure loss is coming from :thumbup:


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OfflinePsyCLown89
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Re: All American Pressure Issues [Re: Toadstool5]
    #21347900 - 03/01/15 11:56 AM (9 years, 10 months ago)

Quote:

Toadstool5 said:
Quote:

2mm or so higher on the side where the bubbles are.




Thats where your pressure loss is coming from :thumbup:




It was the rocker which was releasing pressure though, it was set to 15 PSI so therefore it should not release until the pressure reaches 15 PSI or greater, not so?

There was possibly a very slight bit of pressure loss due to the one side having a bigger gap but I do not think that would cause the issue I was having?


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InvisibleToadstool5
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Re: All American Pressure Issues [Re: PsyCLown89]
    #21348031 - 03/01/15 12:25 PM (9 years, 10 months ago)

It probably wouldnt cause a 4psi drop but it is probably contributing to it. Say you lose 1-2psi from the seal leaking that leaves only 2-3psi.

The rocker or regulator could just be offset by a few psi from being previously submerged in water or through heavy use.


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InvisibleVal
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Registered: 01/31/15
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Re: All American Pressure Issues [Re: hamloaf]
    #21348490 - 03/01/15 02:33 PM (9 years, 10 months ago)

Quote:

THE_LOAF said:
Fungi perfecti has replacement AA pressure gauges.  When installing your new pressure gauge, BE VERY CAREFUL.  PAY CLOSE ATTENTION that the threads of the new pressure gauge and the threads of sterilizer vessel's closure are aligned PERFECTLY before beginning to tighten the pressure gauge.  AA's are made of cast aluminum, and cast aluminum is VERY bendable/mutable.  Any miscalculation made in the making sure that the threads are lined up evenly will result in the stripping of the pressure gauges and sterilizer closure's threads.




Whenever I remove mine I run  a tap thru it to clean up the threads.
A 1/8 NPT-27 works for mine...might want to double check yours...I would get your gage tested or get a new one, and go from there...also reinstall with teflon tape.
http://www.amazon.com/Vermont-American-20371-Carbon-Steel/dp/B000K1LZ76

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OfflineGreen Bastard
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Re: All American Pressure Issues [Re: Val]
    #21348781 - 03/01/15 03:45 PM (9 years, 10 months ago)

Oil and vaseline on an AA?
I've been pressure canning, with my 915, for many years, and just recently made the jump to sterilization, for mycology. Never oiled the metal on metal seal. Just carefully tightened, with a torque pattern. Never had a leak, and no problems maintaining 15 psi.  I just bought, but have yet to use, a huge AA 941. Is the oil a recommended addition?

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InvisibleVal
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Re: All American Pressure Issues [Re: Green Bastard]
    #21348818 - 03/01/15 03:54 PM (9 years, 10 months ago)

Lubrication is specified in the manual....I have to admit I stopped using lube for a while now....after using  many years I even had to clean off the oil because it was getting gunky...I used some fine steel wool.

If using lube such as oil you only need a drop smeared around with your finger or paper towel....ever so slightly

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OfflineGreen Bastard
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Re: All American Pressure Issues [Re: Val]
    #21351888 - 03/02/15 12:40 PM (9 years, 10 months ago)

Quote:

Val said:
Lubrication is specified in the manual....I have to admit I stopped using lube for a while now....after using  many years I even had to clean off the oil because it was getting gunky...I used some fine steel wool.

If using lube such as oil you only need a drop smeared around with your finger or paper towel....ever so slightly




Thank you!

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