W hydraulic ejector is the mechanical equipment which has three functions of exhausting vacuum, draining water and condensation; it is manufactured by innovation on the basis of colligating the advantaged of the same kind national products. The working principle is: the water flow is jetting out form the nozzle with certain gradient after symmetrical distribution under certain pressure, and aggregate on a focus. Because the jet speed of the water flow is very high, the circumference produces sub atmosphere then the vacuum comes into being inside the vessel. Also because the secondary steam is contacting directly with the jetting water flow, processing heat exchange, most of the steam is coagulating into water, few of the steam and the air that doesn't coagulate is rubbing, mixing and pressing mutually. And they are exhaused by the pressure-extending pipe to form high degree of vacuum inside the vessel.

The hydraulic injector has two types different materials of cast iron and stainless steel. The application of which is very wide. It is mainly used in vacuum and evaporation system to carry out techniques such as evaporation, vacuum drainage, vacuum filtration, vacuum rime, desiccation and deodorization.It is and necessary equipment for sugar refining, pharmacy, chemistry, food, salt making, monosodium glutamate, milk, ferment, brewage, light industry, national defense and other departments.