The Large Pharmaceutical Pro Freeze Dryer is a cutting-edge solution designed specifically for pharmaceutical professionals and research institutions. This compact powerhouse delivers precise and efficient freeze-drying, ensuring the preservation of delicate pharmaceutical products and valuable research samples.
Hence, the Premier Pump is especially not affected by warm, ambient conditions. When temperatures rise, it will pull a vacuum far better than the Standard Pump. The Premier Pump is just not affected by outside heat. It pulls the same deep vacuum even when it is in a warm environment.
I would prefer those fittings to have internal O rings and knurled thread on ports (similar to R134a vacuum gauge sets) that do not require high torque compression fittings. Finger tight and you are good to go. You spot a leak, change the O ring and you're back in business.
I sent Harvest Right a note with a picture and they immediately shipped me a new display. Great Service again from the support team there! I think water had dripped down the front and the back of the unit and onto the display card shorting it out.
When it comes to Harvest Right, they have hundreds, or possibly even more stores (they keep popping up every day) and authorized resellers across the USA and Canada.
Tray lids– Though freeze drying is underway, you would possibly end up prepping for the next batch. Tray lids are vital in these conditions, preserving your prepped food from contaminants, odors, or unintended spills with your freezer.
Granted, most of that time is the freeze dryer doing all the work, but the process is not without effort. Once the food is ready it must be put into appropriate containers with oxygen absorbers and sealed properly so they can last.
The item is then heated up again and as the water starts to leave instead of melting (ie going from a solid to a liquid) it sublimates (ie goes from a solid to a gas) under the influence of the negative pressure produced by the vacuum. So you are left with the cell minus water in an intact shape and size.
14 Posted December 16, 2015 (edited) On 7/31/2015 at 11:12 PM, TonyC said: Somehow this post got posted twice so I'll edit the second one with some more useful information. I remember reading somewhere in this thread where somebody was asking how long you run the freeze cycle with pre-frozen food. I have my chest freezer set to -12F, and I usually let the freeze dryer cool for an hour before I put the frozen food in. After I load the food in I wait another half hour to start the drying process. I've had a lot of cycles that the total time between pulling one batch out and starting the drying cycle on the next is around 2 hours. I'm running mine in a cold garage, so it cools down Buy Now pretty quickly. If you have yours in a warm room it would probably take a little longer.
For example, a reseller might charge more for shipping, or they might not include a warranty in the package. Resellers may also not offer the same prices as the manufacturer.
Studies show the average American family wastes about $2,500 per year between produce and dairy that goes bad, leftovers that don’t get eaten, and items that expire or get freezer burn. All these food items could be freeze dried and put on the pantry shelf ready to taste great next week – or in 20 years.
Used freeze dryers can also be worth your while, but it’s imperative to check them before buying and be sure they’re working well. Lastly, always avoid websites that sell off-brand equipment and sketchy manufacturers.
I found out the hard way about the anti-drainback seal when I first tried the filter and got... nothing. I did do some research afterward and learned, as you point out, that there are some filters than don't use the seal but by then I was committed. Fortunately, it wasn't all that hard to remove it, but definitely better not to have to.
Without an pump isolation valve I would expect some air to flow back into the chamber through the pump resulting in the steady rise you witnessed. I saw the same phenomenon before I installed an isolation valve on my pump.