Welding slat length
The length of the welding slat for sealing bags provided in the vacuum sealer. In fact, this is the
maximum seam length that the device can create; the size of the open side of the package should not exceed this length, otherwise it will not be possible to vacuum and seal the package normally. If bags in rolls are used for packaging, the length of the welding slat corresponds to the maximum width of the roll. And powerful industrial models have large slats on which several packages can be placed at once.
Seam width
The width of the seam created by the vacuum sealer's welding slat.
The wider the seam, the more reliable the package is, the lower the likelihood that the welding line will turn out to be a “weak spot”. On the other hand, a large width requires a powerful heater and significantly affects the price of the device. In general, for domestic use, a value of 2 – 2.5 mm is considered quite sufficient; but in heavy industrial models used for long-term storage, values of 10 mm and even more can occur.
For additional reliability, the seam can be made double (see "Features").
Pumping speed
Air pumping speed provided by the vacuum sealer.
The
higher the speed, the less time it will take to operate the device. In addition, "faster" models tend to be more powerful and can deliver deeper vacuums. On the other hand, in normal household use, these points are not critical, and when choosing a "home" sealer, you can not pay much attention to the pumping speed — unless you have to regularly pack large volumes of products, or storage time is crucial.
Power consumption
Rated power consumption of the device. Usually, the characteristics indicate the average power in normal operation; peak values can be much higher, but this mode does not last long.
On the one hand, the efficiency and speed of vacuuming directly depend on the power consumption, on the other hand, the consumption of electricity. And heavy high consumption industrial-grade devices may require a three-phase connection (see "Power supply").
