| 摘要 |
PURPOSE:To enable the air supply even during the continuous operation of a pump, by connecting an air supply tank through a check valve to a pressure tank while connecting the delivery or the suction side of the pump to the lower or the bottom section of said tank. CONSTITUTION:When the water level in a pressure tank 1 reaches to an upper electrode 46 during the operation of a pump 2, a valve 12 is closed while a valve 14 is opened. Consequently the water in an air supply tank 6 is sucked gradually by a pump 2 through a conduit 13 and the air is sucked from a suction pipe 8 into said tank 6. When the water level in said tank 6 lowers to a switch 16, the valve 14 is closed while the valve 12 is opened and the air in said tank 6 is pushed by the pressure of the pump 2 and fed into said tank 1 thus to perform the air supply. |
