... 2000, ISO14001:2004, CE. Vacuum Pumpimpeller of the Vacuum Pump is made of excellent alloy copper,air inlet equipped with ... air valve.,the Vacuum Pump are widely used in Foodstuff,Medicine Package, Disinfectant, Printing ... , Dyeing, Weaving, Plastic Industry, Vacuum Pump's Merits:simple structure, small volume, high-speed extract speed ...