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

The JZJX Roots Vane Vacuum Unit is a combination of a Roots pump as the main pump and a vane pump as the preliminary pump in series. By using a vane pump as the preliminary pump, the Roots Vane Vacuum Unit overcomes the drawback of low vacuum extraction rate at certain pressures during vane pump operation, while retaining the Roots pump's advantages of rapid operation and high vacuum extraction rate. Due to its compact structure, large extraction rate, and small footprint, it can replace multiple mechanical vacuum pumps, making the Roots-vane pump unit widely used in various industries such as vacuum smelting, electric capacitors, transformer vacuum heat treatment, vacuum coating equipment pre-evacuation, and electric vacuum semiconductor industries for extracting gases from sealed containers that are low in oxygen, non-explosive, non-corrosive to metals, non-reactive with pump oil, and free of particle dust.