Figure 2-6. Conventional arrangement of a small tank unit (top view).
d. Single-Compartment Wash Tanks. When the single-compartment wash tank
is used, an overflow pipe is provided (figure. 2-7). The water flows from the inlet pipe,
between and along the surfaces of the films, and then into the overflow pipe. This
arrangement permits rapid washing because of the speed and thoroughness with which
fresh water is circulated across the film surfaces.
Figure 2-7. Single-compartment wash compartment.