I have no adverse vacuum performance change with the catch can in place. It just catches any oil. I still smell oil vapor when the pump first starts up, but not nearly as much. I've only emptied the can once or twice since I've had it installed. I slightly over filled the pump and it blew out into the can, then ran it with the FDer valve open for a few minutes. Nothing got past the can. I used the outside port as IN and the middle one as out. I did take the port off and the longer one should be the inlet port. It's not a great deal longer. Tony Edited January 22, 2016 by TonyC updated (log)
Vic says: 2 years ago Going on a second year with the freeze dryer. Considering getting another one. It really takes commitment, but it is very rewarding. The freezer is good also, but it needs constant source of electricity, and the storage is limited to the size of the freezer.
19.7k Location:Ontario, Canada Posted March 8, 2006 Freeze drying works by quickly freezing the item (and that could include flowers or dead animals as this technology is used to preserve wedding bouquets and in taxidermy) to a very low temperature, then placing it under vacuum to remove the air and water vapour.
The only way I know to filter the water vapor out would be a cold trap. They usually use liquid nitrogen or dry ice to keep the temperature low enough that all the water condenses out. Obviously you would need a supply of the liquid nitrogen or dry ice that would probably not be cost effective for most of us. The other option to get that cold would be to use a cryocooler and build a cold trap around it. It could be done, but would be pretty expensive. I've been watching some electronics on ebay that have cryocoolers in them, but the cheapest I've seen is around $600. Still not a cheap option, but you wouldn't need dry ice or liquid nitrogen to feed it.
One oil free pump. The oil free vacuum pump can be used with any size freeze dryer. They are quiet, fast, and easy to use. The Harvest Right oil free vacuum pumps do not require oil changes and do not require regular user maintenance.
The most popular variety is Bartlett pears available the first two weeks in September in Utah. If they are to be transported or not processed immediately, pick while slightly green and allow them to ripen in a cool, dark place.
Freezing is a simple, quick way to preserve foods. Fruits freeze well and retain their distinct fruit flavor. Texture is usually softened somewhat by freezing, but serving partially frozen fruit with ice crystals will compensate for texture changes.
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Using sublimation, the food retains much of its original texture, flavor, and nutrition when rehydrated. Freeze drying is broken down into two simple processes: freezing and vacuum drying. Foods are first frozen to well below 0°F. The colder the freeze the more efficient the next step website will be. Once frozen, foods are subjected to vacuum drying. The air and water vapor (gas) are removed from the food processing chamber using a vacuum pump. This includes removing the water vapor that was once inside of the foods. When these two steps are properly completed, the food is dry enough to allow for safe storage at room temperature. Is freeze drying food safe?
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Place the product on the trays and push the button to start the machine. Freeze-drying can preserve foods other preservation methods cannot, such as most dairy or egg products.
19.7k Location:Ontario, Canada Posted January 25, 2016 So a couple of months ago (when the weather was still warm) Alleguede has his assistant drop off some raspberries that he wanted me to freeze dry for him. Since they were IQF raspberries I assumed that they would be individual - but apparently when you leave them in the trunk of your car long enough to thaw, then put them back in the freezer - then take a couple of days to get them over to me - they are no longer going to resemble individual raspberries.
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