Chamber vacuum sealers are very good at dealing with liquid. However you will pay $3000/$4000 for a decent machine which you can be assured of getting parts for later. Speaking of parts a new vacuum pump for one of these machine will be in the vicinity of $1000. So expensive to buy and to maintain. So yes the chamber machine will do what you want but at quite a high price.
That issue you are having with seals on the bag can be largely sorted by going to a machine with heavy duty, multiple seal bars. for example our SICO 250 Premium has double seals, the SICO Nevada has triple seals. Both these machine have a huge range of heat adjustment on the seal bar. They will get reliable seals on the bag when the domestic machine cannot.
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