| 摘要 |
PROBLEM TO BE SOLVED: To provide a chemicals adding cylinder capable of feeding a feeding raw water separated into a raw water and a chemicals added water by a simple valve switching operation or capable of feeding the whole amount of feeding water as the chemicals added water. SOLUTION: A passage switching valve 13 having a water feeding port 14 and a pair of drain ports 15a, 15b is connected to the lower part of a chemicals adding cylinder main body 2 wherein a chemicals housing section 7 is arranged. The valve body freely rotatably and slidably fitted into a valve casing 4 of the valve 13 is provided with a raw water passage 18 opened in the side surface of the valve body through a valve body axis center hole communicating to the water feeding port and a chemicals passage 20 formed so as to communicate to a chemicals drawing passage 6 between the inner surface of the valve casing 4 and a recessed surface on the outer peripheral surface of the valve body. In accordance with the displacement of the valve body, the valve body is switched so that the water feeding port is communicated or closed to one side of the drain port and simultaneously the chemicals passage 20 is switched to one side or both sides of the drain port to be communicated. |
