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.
Suction power
Suction power provided by the vacuum sealer.
This parameter directly characterizes the capabilities of the device to create a vacuum. Suction power is the difference between normal atmospheric pressure (1 bar) and the lowest pressure that this model can create inside the package. For example, a figure of 0.8 bar means that the packer can create a pressure of 1 – 0.8 = 0.2 bar. Accordingly, the higher the number in this point, the more powerful the sealer, the deeper the vacuum it creates.
In general, if the products are packed at home for relatively short storage (or vacuuming is combined with freezing), this indicator can be ignored. But for professional use, high suction power is fundamental.
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").
Material
The main material used in the construction of the body of vacuum sealer.
— Plastic. Plastic is inexpensive and quite practical, but noticeably inferior to metal in terms of strength, heat resistance and scratch resistance. Therefore, it is mainly used in devices that are not designed for large volumes of work and high loads — namely, manual and low-power desktop vacuum sealers.
— Metal. Metal cases are extremely strong and reliable, but they are more expensive and weigh more than plastic cases. Therefore, they are found mainly in powerful industrial models, for which strength and reliability are of decisive importance.
— Plastic / metal. Usually, in this case, plastic cases are meant, in which especially critical places are reinforced with metal inserts. This option is typical mainly for desktop models of intermediate and advanced levels. See above for details on plastic and metal; Here, we note that such a combination makes it possible to combine the advantages and, to some extent, mutually compensate for the shortcomings of both materials. So, the cases are not as expensive and heavy as all-metal ones, and at the same time more reliable than all-plastic ones.
