| 摘要 |
PURPOSE:To facilitate regulation of flow by providing at least two types of changeover paths having different diameter at the facing section with the liquid path of pin while crossing at the central portion of pin. CONSTITUTION:A pin 6 is mounted rotatably in a tubular hole section 4 crossing perpendicularly with the liquid path 3. Two types of changeover paths 7A, 7B having different diameter are formed at the facing section with the liquid path 3 of pin 6. The gap T1 of said path is set larger than the diameter T2 of liquid path 3 to prevent simultaneous communication of said paths 7A, 7B with the liquid path 3. Two kind of flows can be selected by rotating the pin 6 and communicating any one of said paths 7A, 7B with the liquid path 3. |
