Figure 7-8. - V-Notch Chlorinator-typical installation, 250 to 500 lb/24 hr.

positive displacement diaphragm pump with a manually adjustable feeding capacity of 3 to 60 gallons per day (fig. 7-12). A motor-driven eccentric cam reciprocates the diaphragm, injecting the solution into the main supply. The use of chemically resistant plastic and synthetic rubber in critical parts contributes to its long operating life.

LOCATION OF EQUIPMENT

Chlorination equipment must be properly located with proper ventilation. All gas-chlorinating equipment and chlorine gas cylinders, filled or empty, should be in a separate room opening only from the outside and should not be in the same room or enclosure with operating equipment, other than equipment required for chlorination. If these conditions do not exist, take up the matter with your supervising petty officer. As we said earlier, a typical chlorinator installation is shown in figure 7-7.

If the chlorination room is not at such an elevation that the floor is level with or above the surrounding ground area, an exhaust. fan (positive pressure blower