In the field of the sieve, especially of ultrasonic sieve, Navector is the excellent supplier. It is Navector that make the particles screening more easily. And we have abundant experience of screening the refined powders, and can provide the latest technology for not only the clarification of the dry particles or micro powder, sample inspection but also the filtration of the liquid or dry powders. The distinguished peculiarity of us is that we concern more about developing the classification of micro powder screening，and the methods of liquid filtering and separating as well as solving the relative problems. Therefore we can make the screening easier and only Navector can screen the dry powder into the diameter of 600m, and the liquid of diameter of 2500m.