How Does Vacuum Level Affect Food Freshness and Shelf Life?

Vacuum level is the single most important variable in determining how long your packaged product stays fresh. It is measured
in kPa (kilopascals) of negative pressure — the further below zero, the more air (and therefore oxygen) has been removed.
Why Oxygen Is the Enemy: Aerobic bacteria and mold require oxygen to multiply. Oxidation degrades fats, vitamins, and
pigments. Even a small residual oxygen percentage significantly accelerates spoilage.
Vacuum Level vs. Shelf Life Reference Data:

The Vacuum Level Trap: Many budget machines advertise “-80 kPa” but cannot sustain that level due to pump wear or gasket
leaks within the first few hundred cycles. Always request a pump specifications sheet listing ultimate vacuum (the maximum
the pump can achieve under no-load conditions) — this should be -98 kPa or better for any machine claiming -90 kPa operating
vacuum.
YGPACK Pump Standard: All YGPACK chamber vacuum machines use oil-sealed rotary vane pumps with an ultimate vacuum
rating of -99.9 kPa, maintaining stable operating vacuum of ≥ -95 kPa throughout the pump’s rated service life.