Vacuum sealers remove air from storage containers, which allows most foods to last longer as oxidation occurs wherever oxygen is present. Oxidation has a damaging result on food quality and freshness. Vacuum sealers ensure oxidation cannot have such an overwhelming effect on food in storage. Food in properly-sealed vacuum packing can last up to five times longer than food stored in other packaging. Vacuum sealing is also an effective means of curbing freezer burn.
The FoodSaver V2240 works in the exact same fashion as the FoodSaver V2040. Foods can be placed within specially designed bags and vacuum sealed with either of these FoodSaver models. After the maximum amount of air has been removed from the vacuum bags, the vacuum sealer will heat-seal the bag, allowing no air to penetrate the bag. Both vacuum sealer models allow the operator to stop the vacuum process if only a certain level of air removal is desired.
Accessory ports on the V2240 and V2040 receive attachments designed for vacuum sealing canisters and oddly-shaped foods. The vacuum and sealing processes for the V2240 and V2040 are triggered with single buttons. Both models feature indicator lights that inform the operator when the devices are engaged. The FoodSaver V2240 features adjustable food settings designed to optimize seals. The "Dry" setting is ideal for foods with minimal liquid content. A "Moist" setting can be used to seal moist or juicy foods with high liquid content.
The manufacturers of the FoodSaver 2240 and FoodSaver 2040 vacuum sealers recommend operators leave a three-inch space between the top of vacuum bag and the items inside the bag. After performing a vacuum seal, operators should let their FoodSaver vacuum sealers cool for at least 20 seconds before attempting to use the device again to ensure it operates efficiently every time. During the vacuum process, liquids and small materials may draw into the vacuum sealer. Freezing juicy or watery foods before vacuum sealing them ensures no liquid will enter the vacuum sealer during the vacuum process.