... 9)The series of Multi-purpose Circulating Water Vacuum Pump takes circulating water as working fluid, uses the negative ... to eject.Providing vacuum condition for the processes of evaporation, distillation, crystallization, drying, sublimation, filtration and decompression, degassing and ... SHB-IIIT: lucid flume is convenient for observe water level and water quality, the rest is the same as SHB- ...