1. The small diaphragm vacuum pump eliminates the tedious oil change operation and is suitable for corrosive gases and organic solvents; 2. All parts that come into contact with gas are made of Teflon material, effectively preventing corrosion of the pump by organic solvents; 3. Small size, light weight, saving test bench space; 4. It can achieve a high vacuum degree below 1.0KPa.