Liquid motive eductors use the kinetic energy of one liquid to cause the flow of another. These eductors consist of a converging nozzle, a body, and a diffuser. In operation, the pressure energy of the motive liquid is converted to velocity energy by the converging nozzle. The high velocity liquid flow then entrains the suction liquid. Complete mixing of the motive and suction is performed in the body and diffuser section. The mixture of liquids is then converted back to an intermediate pressure after passing through the diffuser.

Liquid Neutralizing Station is designed to lower the pH of photographic developers to accept discharge levels. It neutralizes photo waste automatically.