Hi-Flo 9 Culligan Filters are designed to respond to industrial proposes. They are controlled by diaphragm valves opening and closing singly to direct the water flow during service and backwash steps. A timer activates a pilot valve which opens and closes the diaphragm valves. Backwash is automatically started by an electronic programmer, at any time of the day or night, on any day of the week. It can also be started manually and the filter will automatically resume service at the end of backwash step. All models, up to 48”, feature the hydraulic harness in Noryl PVC. Starting from 60” the harness is in cast iron, with epoxy coating. The filter tanks are internally protected by a controlled thickness of epoxy paint, and externally coated with a neutral synthetic enamel Culligan Hi-Flo and TWIN Filters cover any requirements for mechanical filtration and for chemico-physical filtration obtained by means of filtering layers. The processes employed in Hi-Flo and TWIN Filters are: • Filtr-Cleer (UF), to remove any kind of turbidity from the water, and small quantities of Iron and Manganese; the Minerals utilized are anthracite and silica, chemically inert and of unlimited life. • Cullar (UR), to remove undesirable odour, taste and colours, as well as excess Chlorine. Cullar is a granular form of activated carbon. • Cullneu (UU), to neutralize acid water. Cullneu is a granular mineral of Calcium carbonate that dissolves in proportion to the neutralized acidity. • Super Iron (UFP), for selective Iron and Manganese removal UFP Mineral has a strong catalising effect, enhanced by the injection of a proper chemical.