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maimunji
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Registered: 02/27/20
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What working pressure in pc mean?
#26871253 - 08/09/20 09:30 AM (3 years, 6 months ago) |
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Hi i know this is maybe asked a lot of times but i can't found solid answer. So my pc said working pressure 0.55 bar and maximum pressure 1.1 bar. Is this mean pc start working at 0.55 bar or mean its work whole time at 0.55 when i sterilized? its also said: working pressure 0.5 bar. working temperature 80C°-140C°. working valve 0.5 bar(50kpa) safety valve 1.1 bar (110kpa) it is possible for this PC to reach more than 0.5 bar which is 7.5 psi how? more temperature more pressure? is this right? if working valve start open at 7.5 psi how PC reach more pressure then?
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natedawgnow
Rocky mountain hood rat



Registered: 02/09/15
Posts: 8,939
Loc: ation
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Re: What working pressure in pc mean? [Re: maimunji]
#26871291 - 08/09/20 09:55 AM (3 years, 6 months ago) |
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The range between the working pressure and max pressure is just the range of pressure you have available to you once you close the vent.
.5bar is about 8psi 1.1 bar is about 16psi
1.1 is the max which means it wont go higher without added weight to the jiggler but you can run it at 1.0 bar continually
Run it at 1.0 bar for 30min for agar, 2hrs for grain jars, 3hrs minimum for bags
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maimunji
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Re: What working pressure in pc mean? [Re: natedawgnow]
#26874275 - 08/10/20 11:30 PM (3 years, 6 months ago) |
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Ok i understand but how will know how much is pressure coz there is no gauge. And if working vаlve start open at 8 psi how PC will build pressure to 13-15 psi? Maybe just too much thinking.
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Bsdgaou

Registered: 02/20/19
Posts: 340
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Re: What working pressure in pc mean? [Re: maimunji]
#26874295 - 08/10/20 11:57 PM (3 years, 6 months ago) |
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Just get Presto cooker.
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AlsetAlokin
Student

Registered: 07/30/20
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Re: What working pressure in pc mean? [Re: Bsdgaou]
#26874322 - 08/11/20 12:35 AM (3 years, 6 months ago) |
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I'd recommend looking up your PC in the search engine and see if anyone has a tek on it.
If not, good chance it shouldn't be used.
If you're persistent you should do some more research on the foundation of how temperature, pressure and time effect sterilization and cross reference with times Temps and pressures used for mushroom cultivation.
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luksifer
Estimated Prophet



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Re: What working pressure in pc mean? [Re: Bsdgaou]
#26874324 - 08/11/20 12:41 AM (3 years, 6 months ago) |
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Greetings!
As said above, Presto PCs do make things very straightforward. However, that doesn't mean you cannot make what you have work for you! You're all set!
I own a few Prestos, an All American, and a few smaller brands, including Mirro and Zavor. While I do prefer the Presto or All-Am, the others work just fine as well, honestly, they really do! And if you're a doing this as a hobby you likely don't need any of the more expensive ones anyways.
These are usually smaller capacity and are more affordable, and with the almost absolute shortage of all the big well known brands and sizes considered perfect and standard for mycology, mainly Presto, the best balance between cost and quality, one needs to work with what one has available.
If your working with this type of pressure cooker/canner, which doesn't have a pressure gauge, you should have a dial setting that you can adjust on the handle/lid, usually with either 2 or 3 pressure settings. Most just have "high" and "low", or "high" and "medium", though some do have 3 settings. These will usually be located on the same dial as "release" and possibly a few other options depending on model.

If it has two settings, like most do, high and low, the high will correspond with 15psi about 95% of the time, and this should be in your user manual, so you can double check (If you don't have your usual manual you can find them online using the make and model). You can convert bars to psi very easily online also if needed.
The lower setting on mine is 7.5psi, but can vary between models, however, the high setting, in my personal experience, with several types and models of pressure cookers and canners, has always been 15psi and it's pretty standardly and widely accepted as the "default" "high" setting for pressure canning.
So, most likely with your unit, and this can be confirmed if you specify exactly what you have, you simply need to set it to "high" pressure, let it build pressure and release steam until the pressure indicator pops up, and then begin your timer and reduce the heat, keeping it just high enough to maintain steady pressure.
If the indicator is raised, and it's set on high, it should retain 15psi for the duration of your run.
I have done this many times without any trouble, and I've compared it with one that has a guage side by side to experiment a bit and see if it really was reaching full pressure. All indicators point to yes, including a very long zero contam streak..... Knock on wood!.
Hope that was helpful! Happy sterilizing!
Have a great day and good vibes!
-LVXifer
Edited by luksifer (08/11/20 12:49 AM)
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maimunji
Stranger

Registered: 02/27/20
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Re: What working pressure in pc mean? [Re: luksifer]
#26874357 - 08/11/20 01:42 AM (3 years, 6 months ago) |
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Many thanks for reply. its cheap brand Turkish PC im in East Europe Bulgaria yes everything will be for hoby use just for some medicine. there is no 2 setting just pot with lid and 2 valves. Here is some pics. There is nothing that to point me in right direction in instruction.

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wxorx
elsewhere


Registered: 10/18/19
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Re: What working pressure in pc mean? [Re: maimunji]
#27099124 - 12/20/20 10:49 AM (3 years, 1 month ago) |
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Sorry for necroposting, but I wanted to share what I did. Presto or All American are perfect, but out of question, they are not available here, are too expensive and shipping is just too much. It is great piece of hardware but I don't want to pay it twice just to have it. So, here we have to deal with what we have. I got that very same turkish no brand cooker as yours. The good thing is, that both safety valve and operating valves are replaceable and you can mod it putting stiffer spring in the operating valve, but you must get an manometer, otherwise you don't know what you are doing. I've also got another cooker, it is bulgarian made, search for Elekom-c5, c7 or c9 - that is volume in liters. Very well built, and it's operation valve is not spring loaded, but weight. With the stock weight, which is 80 grams it makes about 0.75-0.8 bars of pressure. I've drilled a hole on the cover and mounted an manometer 0-6 bar, better would be 0-1.6 bar, but this was only available at the local store. Then I tried putting different weight over the stock weight and found a 14mm (9/16") hex socket to do the trick - with it it makes exactly 1.1 bar. Safety valve here is spring loaded too, I didn't messed with it, it should open at about 1.2-1.3. Here are the pics from my modded cooker:
It cost me about 70 leva, which is 35 EUR. Manometer was 14 leva, or 7 EUR. The socket is free, I had it.

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maimunji
Stranger

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Re: What working pressure in pc mean? [Re: wxorx]
#27139018 - 01/10/21 04:38 AM (3 years, 1 month ago) |
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Quote:
wxorx said: Sorry for necroposting, but I wanted to share what I did. Presto or All American are perfect, but out of question, they are not available here, are too expensive and shipping is just too much. It is great piece of hardware but I don't want to pay it twice just to have it. So, here we have to deal with what we have. I got that very same turkish no brand cooker as yours. The good thing is, that both safety valve and operating valves are replaceable and you can mod it putting stiffer spring in the operating valve, but you must get an manometer, otherwise you don't know what you are doing. I've also got another cooker, it is bulgarian made, search for Elekom-c5, c7 or c9 - that is volume in liters. Very well built, and it's operation valve is not spring loaded, but weight. With the stock weight, which is 80 grams it makes about 0.75-0.8 bars of pressure. I've drilled a hole on the cover and mounted an manometer 0-6 bar, better would be 0-1.6 bar, but this was only available at the local store. Then I tried putting different weight over the stock weight and found a 14mm (9/16") hex socket to do the trick - with it it makes exactly 1.1 bar. Safety valve here is spring loaded too, I didn't messed with it, it should open at about 1.2-1.3. Here are the pics from my modded cooker:
It cost me about 70 leva, which is 35 EUR. Manometer was 14 leva, or 7 EUR. The socket is free, I had it.


i successfully sterilized in this Turkish brand Pc to this point 2 batches with brf jars and inoculate with paylocibe cubensis I have one successful harves and waiting now second batch to fruit. This second time i have contamination on 4 jars from 8 total but think is come from inoculation not from bad sterilization because contamination is on inoculation point i Pc for 1 hour.
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