A vacuum pump is a device or device that USES mechanical, physical, chemical substance or physical-chemical strategies to pump air away of a container to obtain a vacuum.Generally speaking, vacuum pump is a device that improves, generates and maintains vacuum in a closed space simply by various means.
Regarding to the working basic basic principle of vacuum pump, vacuum pump can be divided in to two types, namely 
gas catch pump and gas transfer pump.It really is widely used in metallurgy, substance industry, meals, electronic coating and additional Small Vacuum Pump industries.