- Anything with too high a fat content may give some problems because the oils or fat will not evaporate, only the water will.
The only downside is that the interior is now so cold that defrost time has doubled! I use a large high volume fan to defrost the unit, not the heat trays. It used to be a 15 minute job, now it is closer to 30 minutes.
Freeze drying with the Harvest Right Pharmaceutical Freeze Dryer completely removes all the water from organic material in about 24 hours. There is pelo other preservation method that can come close to eliminating the water from organic material this quickly.
Also, since it’s such a large amount of money in question, you don’t want to lose your warranty, which can happen if you buy through resellers.
When buying online, it’s best to buy directly from the manufacturer of the freeze dryer. Not only does this guarantee that buyers get a tested, working product, but buyers often get a warranty in addition to support.
It's awesome! I don't have a freeze dryer yet but am planning to place an order tomorrow. I am super curious how Kerry's scroll pump is holding up... eliminating the oil from the equation would make this whole thing SO much easier.
Oil Mist Filter: Both pumps come with an oil mist filter. However, the Premier Pump’s oil mist filter allows for pelo oil spray at all and it will last much longer.
A bit of background on me - I used to work in a sold state fabrication lab (university research lab) and had a lot of hands-on work with ultra-high vacuum equipment. The pumping we do for freeze drying was what was required to just start
This method of shopping is usually considered a bit outdated, but you can still get all the necessary information about freeze dryers on the phone by talking to a company salesman.
Karla Abreu says: 2 years ago I just think pressure canning get more info is the easiest way to preserve food and know it is totally sterile. And it is relatively easy
Additionally, freeze dried food is very light, since all the water is removed, and can be easily transported for hiking and camping or when used during long term emergency needs.
Run full system test with no food in chamber (results, 630 mTorr lowest steady reading - looking through the oil level window, some bubbling seen in oil even after an hour of pumpdown - some "air" noises from pump)
Is it flash freezing and dehydrating at the same time? Do the items need to be kept frozen, or stored at room temp?
As long as the food is dried to a low residual moisture, vacuum packaging is safe. Remember, vacuum packaging is not a food safety process itself. In fact, removing oxygen from a package may make it more of a concern for the botulism bacteria to grow and produce toxin if there is a moist environment.