| 摘要 |
A water softening system has sampling pipes (21) and (22) in first and second water softeners (4) and (11). In use water to be treated first flows through the first water softener (4), and not through second water softener 11. Once the hardness component concentration of the treatment water sampled by sampling pipe (21) reaches a specified concentration, the watercourse selection of control valves (2, 6, 9, 13) are switched, causing water to flow through the second water softener (11) instead of the first. First water softener (4) is regenerated by salt water from a salt water chamber (14). The resulting water softening system prevents the leaking of hardness components, even with there is a fluctuation in the water quality of incoming water or when there is performance deterioration in the ion exchange resin. <IMAGE> |
