The vacuum time of the miniature vacuum pump to the vessel

Mini vacuum pump is not a simple arithmetic problem about the time of vacuum pumping for closed containers. Many customers misunderstand this problem.For example, a 10 liter container can be vacuumed with a miniature vacuum pump of 5L/min, and the vacuum in the container can reach the pump's maximum vacuum within 2 minutes.When the pump is pumping, the pumping speed is indeed 5L/min at the beginning, but once the vacuum is inside the vessel, the pumping rate decreases. As the vacuum in the container increases, the pumping rate also decreases. This is not a simple linear process, but an exponential process.