Cidi specializes in the research, development, and sales of vacuum equipment.

The JZJX Roots Blower Vacuum Unit is composed of a Roots pump as the main pump and a scroll pump as the preliminary pump in series. By using a scroll pump as the preliminary pump, the Roots Blower Vacuum Unit overcomes the drawback of low gas extraction rate at certain pressures during the operation of scroll pumps, while retaining the advantages of the Roots pump, which can work quickly with a high gas extraction rate. Due to its compact structure, large extraction rate, and small footprint, the unit can replace multiple mechanical vacuum pumps, thus the Roots pump-scroll pump unit is widely used in industries such as vacuum smelting, electric capacitor, transformer vacuum heat treatment, preliminary vacuum for vacuum coating equipment, and electric vacuum semiconductor, for extracting gases from sealed containers that are low in oxygen, non-explosive, non-corrosive to metal, non-reactive with pump oil, and free of particle dust.