What are the meanings of the vacuum pump, the front pump and the main pump?
The main pump can be understood as a booster pump, used to improve the vacuum mechanical pump with pumping quantity. As the roots pump, diffusion pumps, molecular pump. These can not use (too much pressure) so the need for mechanical pump drainage, the vacuum chamber is pumped into the rough vacuum, then the main pump starts to work.
The main pump and the front pump with the general vacuum unitThe front pump can be understood as a mechanical pump. It can be used by itself, but the pumping rate or the vacuum can not meet the requirements. In this case, we add a booster pump
In operation, the main gas extraction limit vacuum is achieved by the main pump, so we call it the main pump, which plays the main role of the pumpThe front pump is the pump that needs to be opened ahead of the main pump. It is called the pump before the main pump and the pump running the main pumpIf you don't understand, look at your signature and ask again
