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 Joshua
Holoman
Registered: 10/27/98
Posts: 5,398
Loc: The Matrix
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 Re: Vaccume drying  [Re: SixTango]
#863824 - 09/04/02 02:47 PM (22 years, 3 months ago) |
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Have you hooked up a vacuum chamber yet? If so w/ what kind of results?
Joshua
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The Shroomery Bookstore
Great books for inquiring minds!
"Life After Death is Saprophytic!"
Edited by Joshua (09/07/02 01:34 PM)
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TripsAreForKids
addict
Registered: 04/23/01
Posts: 465
Loc: Not In The US
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 Re: Vaccume drying [Re: SixTango]
#865631 - 09/05/02 01:35 PM (22 years, 3 months ago) |
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In reply to:
For a containment chamber -- use an AA type PC. Butt wipe simple to hook up & use. Place a valve between the 2. Run pump to 29 pounds & close the valve. To save the pump from running -- against itself & turning to toast.
Arent pressure cookers designed to keep pressure in? and not out? Has anyone ACTUALLY tried to hold a vacuum in a pressure cooker?
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Everything posted above was out of fun, none should be taken serious. I am currently under the influence so take that into consideration.
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Shaw
Registered: 06/27/01
Posts: 2,263
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And you think it's going to collapse on its self? That'd take alot of vaccume
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GRTUD
INFP
Registered: 01/30/01
Posts: 270
Loc: United States
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My experiences have shown that a metal to metal seal is probably not a good one for vacuums. There are allot of scientific reasons this is true, not the least of which involves heat, expansion and pressure all increasing in direct proportion to each other (see, Charles' and Boyle's laws, if memory still serves). With that said, constant heating and cooling of a vessel relying on rubber or even asbestos gaskets causes wear and eventually failing of these materials whereas metal to metal surfaces tend to seal Better under these circumstances (of course they have to be machined properly). But vessels that will expand and seal under heat and pressure can leak when placed into a vacuum. My preference would be to buy a new PC (of either type, good quality mind you) and use it specifically for pulling vacuums. I would also tend to believe that a PC with a rubber gasket or other plyable material would be the better choice, but this is strictly a hyphosis as I have no actual experience in this specific case - really! Happy trails!
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"New shit has come to light..."
Edited by GRTUD (09/05/02 03:41 PM)
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 DinoMyc
Ipsa scientiapotestas est
Registered: 11/13/99
Posts: 1,080
Last seen: 18 years, 5 months
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Re: Vaccume drying [Re: GRTUD]
#866614 - 09/06/02 05:49 AM (22 years, 3 months ago) |
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Actually, UHV systems (ultra high vacuum) allways use a metal-metal seal. HV systems sometimes use a rubber gasket seal, however those outgass at UHV.
That being said, in this case, you do not have a precision metal-metal seal designed to hold a vacuum, and you would be better off with a system specifically designed to do so... so a proper rubber gasket seal designed to hold a vacuum, rather than hold a pressure, is what your looking for.
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If I made affront, I apologize.
If I made affirmation, I apologize.
I merely came to listen, came to say.
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matts
matts
Registered: 01/28/02
Posts: 3,649
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Shaw
Registered: 06/27/01
Posts: 2,263
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Re: Vaccume drying [Re: matts]
#867871 - 09/06/02 07:04 PM (22 years, 3 months ago) |
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It would take quite some time to reach 28" of vac on a hand pump, not to mention maintaining the pressure. If you want to try a hand pump, use a very small vaccume chamber. If i get around to it, i'll see how much vac i can get out of a small mouth half pint jar. It might get enough for the purpose, I'd put a little dessicant in the bottom, and a fat mushroom. And matts, i just raised your rating.
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Edited by Shaw (09/06/02 07:12 PM)
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Aeolus1369
Dr. Seahorse
Registered: 05/20/02
Posts: 367
Last seen: 15 years, 9 months
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Re: Vaccume drying [Re: Lights]
#868069 - 09/06/02 10:12 PM (22 years, 3 months ago) |
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Awhile ago I made a post about a drying technique I used involving an "instant marinator" device:
vacuum dessicator
It's basically a sturdy plastic container with a lid and a hand operated vacuum pump. It's hard to get a very powerful vacuum going with just the handpump, but maybe it would be a suitable container that a more powerul pump could be attached to. When I'm not so tired I'll find it's brand and model number for anyone interested.
--Aeolus
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matts
matts
Registered: 01/28/02
Posts: 3,649
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DinoMyc
Ipsa scientiapotestas est
Registered: 11/13/99
Posts: 1,080
Last seen: 18 years, 5 months
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Re: Vaccume drying [Re: matts]
#868623 - 09/07/02 08:45 AM (22 years, 3 months ago) |
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Lab/industrial quality vacuum pumps are expensive, but you can get them used or rebuilt for relatively cheap.
I would not reccomend edmund scientific, they are WAY WAY WAY overpriced.. I think their markup is something like 300%..
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If I made affront, I apologize.
If I made affirmation, I apologize.
I merely came to listen, came to say.
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psychomycul
Praise me for Iam great
Registered: 03/21/02
Posts: 48
Last seen: 12 years, 11 months
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 Re: Vaccume drying [Re: SixTango]
#880198 - 09/12/02 08:44 AM (22 years, 2 months ago) |
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My Dog owns a foodsaver by Tilia. He's found it to be very effective. It's one of the older ones before they started dropping down the pump size. It's capable of 29" It vacuums canning jars and it came with an 8 liter transparent container capable of holding a vacuum for over 5 months. After the drying is done the bag vacumer part is good for long term storage.
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It's All about the music
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psychomycul
Praise me for Iam great
Registered: 03/21/02
Posts: 48
Last seen: 12 years, 11 months
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Re: Vaccume drying [Re: DinoMyc]
#880204 - 09/12/02 08:46 AM (22 years, 2 months ago) |
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The 500 dollar home one that I have isn't quite as effective as the professional grade but it's good enough to explode a spider.
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It's All about the music
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Lights
Mad scientistextrodionar~
Registered: 07/17/02
Posts: 47
Loc: Aside the rectum
Last seen: 21 years, 8 months
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Look at HVAC supply stores. Ritchiee sells a vac that will boil ice at room temp. It is around 250 dollars new. It also has a guadge. When ultimate vac is achieved it will be indicated on the guadge. Ultimate vac is achieved when all water has been evacuated from the system.It will do it fast too. As a bonus your shrooms won't shrivvel a bit. they will end up big and poofy and very airy.
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Angel_Magic79
HOT DIGGITY DOG
Registered: 02/26/02
Posts: 119
Loc: Siberia
Last seen: 22 years, 2 months
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Re: Vaccume drying [Re: Lights]
#880735 - 09/12/02 02:13 PM (22 years, 2 months ago) |
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-You have '29'Vacum in a area of 16 SqrFt- How long does it take to dry mushies? You wouldn't need to fan dry them first- right?
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ShroomChicks WANTED!!!
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Brunett & AVERAGE weight(I Stress)!!!
Please PM me with a current PIC!
Yours truly Mr. Angel- AKA. MOJO MAN
***FEMALES ONLY***
Edited by Angel_Magic79 (09/12/02 02:31 PM)
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Lights
Mad scientistextrodionar~
Registered: 07/17/02
Posts: 47
Loc: Aside the rectum
Last seen: 21 years, 8 months
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Volume is is measured in cubif feet. This perticular Vac will pull 15 cfm Evacuating all the air out of the system pretty fast. Then just wait till it reaches perfect vac.
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ChuangTzu
starvingphysicist
Registered: 09/04/02
Posts: 3,060
Last seen: 11 years, 2 months
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Re: Vaccume drying [Re: Lights]
#885736 - 09/16/02 12:39 PM (22 years, 2 months ago) |
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try labx.com or ebay for cheap vac pumps that can get down to 10-15 Torr. also, i 've seen 1L round bottom flasks go down to about 1Torr or less with no problems. might be hard to get the mushrooms out whole though.
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TripsAreForKids
addict
Registered: 04/23/01
Posts: 465
Loc: Not In The US
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Re: Vaccume drying [Re: Shaw]
#885919 - 09/16/02 02:43 PM (22 years, 2 months ago) |
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Im not stupid. Im just saying, its designed to make the seal expand as heat increases, thus creating an even better seal, for keeping pressure IN, when you reverse it, and have no heat, It surely won't provide such a great seal. Much less hold it for a long enough time. Maybe if you put a bead of silicone around it, then as pressure decreased, it would suck it down creating a better seal as you get less and less pressure... Btw, how do you plan on hooking a pump to the pressure cooker?
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Everything posted above was out of fun, none should be taken serious. I am currently under the influence so take that into consideration.
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Mushroom_Madness
enthusiast
Registered: 01/10/02
Posts: 261
Loc: Quaint New England Villag...
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Re: Vaccume drying [Re: Shaw]
#887340 - 09/17/02 04:39 AM (22 years, 2 months ago) |
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Poster: Shaw
Subject: Re: Vaccume drying
It would take quite some time to reach 28" of vac on a hand pump, not to mention maintaining the pressure. If you want to try a hand pump, use a very small vaccume chamber. If i get around to it, i'll see how much vac i can get out of a small mouth half pint jar. It might get enough for the purpose, I'd put a little dessicant in the bottom, and a fat mushroom. And matts, i just raised your rating.
If I'm not mistaken, using a canning jar as a vacuum desiccators is dangerous (depending on the vacuum that is created). First and fore most, the aluminum top will collapse inside (hopefully before the jar implodes and glass is everywhere.) If you use a canning jar, you will be using it at you own risk. Be careful.
Edited by Mushroom_Madness (09/17/02 04:45 AM)
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Shaw
Registered: 06/27/01
Posts: 2,263
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I was unclear on that. i wasn't intending for the canning jar to reach 28" of vac. it would be alot less vac, but still might show some results.
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fungusdude
nobody special
Registered: 05/24/02
Posts: 19
Loc: charlotte nc
Last seen: 22 years, 2 months
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Re: Vaccume drying [Re: Shaw]
#893927 - 09/19/02 03:29 PM (22 years, 2 months ago) |
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I have used canning jars to store perishables. I put whatever into the jars and apply a film of alcohol around the top edges of the opening ,cover with a canning lid (no ring) now hold the lid open just a bit and light that sucker quickly set the top down as the fuel mixture burns.do not have your hands in the way as a nice little flame shoots out before it seals . this will not give you a perfect vacuum but easily as good as regular canning type vacuum. i would be careful not to use any cracked jars.
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just bullshit
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