If you’re looking for something that’s easy to use and can meet your occasional sealing requirements, then external vacuum sealers would fit that bill quite well. Just make sure you properly feed the open end of the vacuum-able bag or pouch into the appliance. The machine will do the rest. Since the actual evacuation of air from the bag takes place outside the appliance, it allows the vacuum sealer to have compact design.
Based on how the air is removed from the bag, modern external vacuum sealers may be divided into two types. Each category is explained in more detail below.
Purchase Related Facts About Clamp Type Vacuum Sealer:
- Liquid Deposition Tray: These appliances aren’t ideally suited for sealing liquids or food with high fluid content. However, some newer models feature a drip tray at the bottom that accumulates excess liquid, thereby preventing it from getting accidentally sucked into the appliance. So, if you plan on sealing a lot of ‘juicy’ foods, then opt for one with a drip tray.
- Attachments: Entry models can only vacuum-seal bags and pouches. However, moving up the price range ($100-$200), you can find appliances featuring special attachments that could then be used for removing air from canisters and jars (proprietary, of course).
- Sealing Bar: The length of the sealing bar in these vacuum packers can range from 5″ to 16″ and more for commercial models to accommodate embossed, channel, and Mylar bags of varying widths. A machine with a 10″ or longer sealing bar are great for foods like meat, fish, etc, or when used for simultaneously sealing more than one smaller bags.
External Vacuum Sealers With A Retractable Nozzle
Just like any basic clamp type design, these machines also employ a similar mechanism need to hold the open end of the bag or pouch in position before the air extraction process can start. The difference, however, is the small tube that peeks into the bag to remove all the air and moisture and retracts back into its original position before the sealing process starts.
The advantage with these types of external sealers is that they can work with any kind of bag or pouch, which in turn reduces the overall expenditure incurred when purchasing lined or textured pouches. On the flip side, retractable nozzles can easily suck in liquid into the appliance, and should therefore be limited to packing solid foods.
Purchase Related Facts About Retractable Nozzle Type Vacuum Sealer:
- Gas Flushing: Its already evident how efficient the nozzle suction can be. However, the nozzle, in more expensive models, can also pump inert gases like nitrogen into the bag. This is great for packing food items like coffee beans, chips and other inedible items (of a fragile nature). The absence of oxygen checks against biological deterioration, corrosion etc whereas the puffiness affords the much needed buffer against breakage.
- Seal Bars: For most home-use vacuum sealers, the heating element (seal bars) can either produce a single or double seal. Single seals will suffice for most domestic sealing needs. However, in cases where a high degree of vacuum strength is required, it’s best to double seal the bag.