I would prefer those fittings to have internal Este 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 Este ring and you're back in business.
The shelf heaters can be set to automatically control the rate of sublimation during the primary drying cycle.
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 "real" vacuum pumps on those machines, with ultimate vacuum levels a few more demial places over. I've chased many a leak in my time,but it was: A.
Unlike canning or dehydrating, freeze drying retains 97 percent of the food’s nutrients. Freeze dried food also tastes more like fresh food than canned or dehydrated foods.
Upon turning off the pump (no isolation valve on the pump - standard setup), the chamber pressure rose quite rapidly going to 2000 mTorr and continuing up in a couple of minutes or so.
Door seal appears good against the plexiglass side, even stripe of contact, nice and wide. Inside gasket groove has been checked for debris and cracks. Looks OK, but the design seems odd to me!
oito) The vacuum port was up next. You can see the condensation on the brass fitting. That means cold is escaping and heat is getting into the chamber. This small section was placed inside the panel.
AN8 male fittings are 3/4 X 16tpi. Should be able to get one that will work in this application. Know More Also, there filters that use metric threads, might be easier to deal with.
Out of caution, I have only ever taken mylar bags in a checked bag and I’ve never had a problem. I know of people who have taken them in carry-on bags as well without issues.
As a bonus, freeze-dried products are lightweight making them desirable for outdoor activities, emergency kits, and even space missions. Food manufacturers looking to broaden their offerings find freeze-drying prepackaged food as an enticing option because of the increased safety of food and reduced waste.
The current and emerging food crises in the United States have millions of Americans very concerned about the future. From supply chain shenanigans to food processing plants “inexplicably” being compromised to bird flu decimating the poultry industry, it’s pelo wonder there has been a sharp rise in the “prepper” food industry.
Freeze drying has been proven essential throughout many industries where stability of the product is of utmost importance. The pharmaceutical field greatly benefits from freeze drying as medicines are rendered impotent for long durations without losing their potency, while in the food industry, freeze drying prevents decay of food without compromising on taste or texture.
•Control of the shelf temperature during the dry cycle. This includes setting as many as five different shelf temperatures, thus allowing the material to dry in phases, at different temperatures.