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 donrjuan
Shaking Ofter
Registered: 10/20/10
Posts: 454
Loc: Colifornia East
Last seen: 1 day, 3 hours
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 PC Upgrade? 
#28156272 - 01/25/23 06:18 AM (5 days, 16 hours ago) |
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I posed this in tools, but I wanted to have a real discussion about it. I replaced the blow out plug on my Presto 23qt with a 25psi pop off valve. The idea was to not drill the vessel and be able to revert. Here are the parts used
The flat area stamped into the rocker area will make sealing there difficult even if you drilled it out. I decided to removed the rocker petcock and block it with a small bolt inserted from the inside.
I had to trim the neoprene washer as it was touching the gasket, no big deal. I drilled a hole in the plug, off center for obvious reasons.
A clip was used to hold it open to vent initially. My plan is to print a small spacer to keep it open.
I have run it to pressure a few times now, and the performance was great. At the U in "caution" it start to vent. I would love it if I could keep the safety plug also but no drills right now...
I am looking forward to running agar and bags through this thing. It gets to pressure faster and requires less energy to maintain. If my bags have less stretching then it is a huge win!
Thoughts, opinions?
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 Team Wrap Fluid
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NuclearTidalWave
Dyler Turden
Registered: 09/08/16
Posts: 346
Loc: Simulation #7
Last seen: 6 hours, 36 minutes
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Whats wrong with the stock pop up valve?
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donrjuan
Shaking Ofter
Registered: 10/20/10
Posts: 454
Loc: Colifornia East
Last seen: 1 day, 3 hours
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A Presto 23qt only has a rocker, over pressure plug, and a lid lock
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Gorguss
Chaotic sums
Registered: 02/03/10
Posts: 436
Last seen: 2 days, 13 hours
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Quote:
Where can you buy those genuine replacement rubber gaskets? I've tried 2 different amazon vendors and Presto site itself. These weird rubber band things come instead of the original thick grooved ones like in this picture.
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 AyePlus
Stony Danza
Registered: 12/19/14
Posts: 2,645
Loc: Fairfield, Connecticut
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 Re: PC Upgrade? [Re: Gorguss]
#28156323 - 01/25/23 07:21 AM (5 days, 15 hours ago) |
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Using a drill to widen and Tap and die to rethread the hole where the rocker is and using the AA stopcock would be alot safer, I’d keep the overpressure plug hole and widen change out for a 1010 plug from AA also.
Tbh prestos are so thin and easy to warp you better be super careful and make sure to use extra water, I’d only feel safe running it on a hotplate or smallish stove.
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Wintergirl
Student
Registered: 03/19/22
Posts: 75
Loc: Home Planet
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Re: PC Upgrade? [Re: AyePlus]
#28156569 - 01/25/23 03:43 PM (5 days, 6 hours ago) |
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The directions that came with my 23qt Presto warn not to use it on burners with output greater than 12,000 BTU's.
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donrjuan
Shaking Ofter
Registered: 10/20/10
Posts: 454
Loc: Colifornia East
Last seen: 1 day, 3 hours
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Re: PC Upgrade? [Re: Gorguss]
#28156582 - 01/25/23 03:59 PM (5 days, 6 hours ago) |
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Quote:
Gorguss said:
Where can you buy those genuine replacement rubber gaskets? I've tried 2 different amazon vendors and Presto site itself. These weird rubber band things come instead of the original thick grooved ones like in this picture.
That is the original, I have not had to replace any of mine. I use petroleum jelly on them each cycle which helps it to seal up. This is my oldest at 20yrs and still soft.
ACE hardware has OEM replacement parts or did.
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donrjuan
Shaking Ofter
Registered: 10/20/10
Posts: 454
Loc: Colifornia East
Last seen: 1 day, 3 hours
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Re: PC Upgrade? [Re: AyePlus]
#28156590 - 01/25/23 04:24 PM (5 days, 6 hours ago) |
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Quote:
AyePlus said:
Using a drill to widen and Tap and die to rethread the hole where the rocker is and using the AA stopcock would be alot safer, I’d keep the overpressure plug hole and widen change out for a 1010 plug from AA also.
I am running some things this weekend so it will be getting tested thoroughly. If satisfied, I will likely go ahead and drill a proper port for the pop valve and replace the overpressure plug for good measure. Is the AA plug arguably better?
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AyePlus
Stony Danza
Registered: 12/19/14
Posts: 2,645
Loc: Fairfield, Connecticut
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They make two. One is rated to blow at 35psi and made for a sterilizer, the red one, 1010 i believe is the part#.
the black one is basically the same as the presto i think theyre rated at around 25
The AA stopcock also has a pressure release at 30 that drops it to 20 for another layer of safety.
With your current setup it’d be really easy to go waay above a safe pressure in a dinky little cooker and become the next cautionary tale…
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bobbii
Registered: 10/23/22
Posts: 51
Last seen: 22 hours, 33 minutes
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Re: PC Upgrade? [Re: AyePlus]
#28156701 - 01/25/23 06:13 PM (5 days, 4 hours ago) |
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Looks a bit dangerous to tamper with, fingers crossed.
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