Vacuum unit with vacuum pressure as power source, as a means to realize automation, has been in the electronics, semiconductor device assembly, auto assembly, automatic handling machinery, light industry machinery, food machinery, medical machinery, printing machinery, plastic machinery, packaging machinery, forging machinery, robot has been widely used in many ways. The vacuum generator has two kinds: vacuum pump and vacuum generator.Vacuum pump is the suction inlet to form negative pressure, exhaust directly through the atmosphere, both ends of the pressure ratio is very large to remove the gas machinery.Compared with vacuum pump, it is simple in structure, small in volume, light in weight, low in price, easy in installation, easy in combination with accessories, quick in vacuum generation and relief, suitable for intermittent work with small flow rate and suitable for dispersed use.• Nozzle diameter: 0.5. 0.7 • Resin body, light weight • Built-in quick-change connector (copper-free treatment has been done) • The vacuum port and the air supply port are in a straight line, easy to pipe