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

The JZJX Roots Blower Vacuum Pump Set is a combination of a Roots pump as the main pump and a scroll pump as the preliminary pump. By using a scroll pump as the preliminary pump, the Roots Blower Vacuum Pump Set overcomes the drawback of low evacuation speed at certain pressures during the operation of scroll pumps, while retaining the advantages of the Roots pump, such as rapid operation and high evacuation speed. Due to its compact structure, large evacuation rate, and small footprint, this set can replace multiple mechanical vacuum pumps, making the Roots pump-scroll pump set widely used in various industries such as vacuum smelting, electric capacitors, transformer vacuum heat treatment, preliminary evacuation for vacuum coating equipment, and electric vacuum semiconductor industries. It is used for removing gases from sealed containers that have low oxygen content, are non-explosive, non-corrosive to metals, do not react chemically with pump oil, and do not contain particle dust.