a device for dispersing fluid polymeric material in a liquid diluent without degradation of polymer chain length includes a body having a generally t - shaped interior cavity with a pair of opposed inlets and a side outlet . one inlet holds a diluent injection assembly while the other holds a polymer injection assembly . the juxtaposition of the front ends of the injection assemblies within the interior cavity creates a zone where concurrent streams are pre - mixed and an orifice where the pre - mix is immediately subjected to high shear forces ; adjusting the relative positions of the injection assemblies changes the size of the orifice . the continuous on - line supply of a polymer dispersion to a point of use incorporates such a dispersing device , a metering pump for supplying polymer and a small detention tank , which ages the dispersion for about a minute before it is delivered to a conduit leading to the point of use .