The SP Pack separator is developed by Paragon Engineering Services, this separator creates turbulent flow by forcing the water to flow through a serpentine pipe path. The path is correctly size to create a correct turbulence to cause coalescence but not great enough to shear the droplets. The pipe path will not cause a plugging problem since it has similar size with the inlet piping.
The figure above shows a SP Pack separator installed inside gravity settling device. The gravity settler will work more efficient since the drop size will grow larger.