I. Overview JZJWLW vertical oil-free vacuum unit: JZJWLW vertical oil-free vacuum unit is mainly ZJP series Roots vacuum pump to WLW vertical oil-free vacuum pump series for pre-made. WLW-type vacuum pump to overcome the limits of high pressure, in - under pressure given the shortcomings of low pumping rate, while retaining ZJ series Roots vacuum pump to work quickly, there is a greater pumping speed advantages. So JZJW series Roots vacuum oil-free reciprocating vacuum distillation unit is widely used in the chemical industry, vacuum evaporation, crystallization dehydration; frozen food industry, drying, vacuum drying process in the pharmaceutical industry. Kai Qing Shanghai Pump Manufacturing Co., Ltd. is a company specializing in research, manufacture, production and sale of pumps technology companies. The main products are: vacuum pump, vacuum unit series, series water ring vacuum pumps, rotary vane vacuum pump series, Diaphragm series, submersible mixer series, the most professional vacuum pump manufacturer Shanghai direct selling, all three bags of products, and look forward to you cooperation, please call the free service hotline: 4000-889-202.