LUSHUN ZJS Series Roots Water-ring Vacuum Pump Unit is widely used for: (1) Chemical products vacuum distillation, vacuum evaporation, dehydration crystallization and vacuum drying; (2) Polyester chips treatment in textile industry; (3) Vacuum drying and vacuum distillation in pharmaceutical industry; (4) Vacuum freeze drying, vacuum compression and vacuum preservation in food industry. This kind of vacuum pump unit can be used for vacuum smelting and degassing molten steel in metallurgical industry.