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ZJ Vacuum Pumping Unit SeriesUse:This unit is suitable for pumping in substation industries, administration of powersupply, power generation plants, and transformer manufactory for electrical vacuumdevices, and is also suitable for pumping in vacuum melting, welding, drying,chemical pharmacy. It can achieve an operating vacuum degree of 133Pa at thesame time attain an limit vacuum degree of 5Pa. But gases which are unsuitablefor pumping include toxic gases, explosive gases, gases with high oxygen content,gases with high moisture content, gases which are reactive with the vacuum gasor cause erosive effect on ferrous metal.Feature:(1) Quick starting, high pumping rate, stable performance, easy-to-use.(2) The unit takes Roots Pump as main pump and spinning vacuum pump as pre-stagepump.(3) A vacuometer is used to meter and control vacuum of pumped container.(4) The unit adopts France-made Schineider Electric for control element.(5) Full-automatic and non-presence of operation with lamps in