LOSS OF HEAD MEASUREMENT METHOD FOR CLEAN WATER RESERVOIR

摘要

A time for a reverse cleaning is decided by measuring of a loss of head in the process of a rapid cleaning. A filtering part is connected to a lower part of a pressure chamber (33), the upper end of the meaurement tube (81) of a water level is highly installed than a maximum water level in the pressure chamber (33). The loss of head can calculate comparing the water level of the cleaning water reservoir (10) with the water level of the pressure chamber (33).