| 摘要 |
PURPOSE:To maintain the accuracy of the ratio of flow distribution and collection and prevent a liquid pressure loss by a method wherein the flow path area of a variable choking valve, provided between liquid pressure chambers and ports, is increased in accordance with the increase of a liquid flow amount in the port. CONSTITUTION:A spool 14 and two sets of choking means 32, 34 are provided in a housing provided with one set of port 8 and two sets of ports 10, 11. This valve means is formed by a choke valve control means 36 as a variable choking valve increasing the flow path area thereof in accordance with the increase of the liquid flow amount in the port 8. According to this method, a proper liquid pressure difference is generated before and after the variable choke valve means 32, 34 in accordance with the flow amount of liquid passing through the flow distributing and collecting valve, therefore, the ratio of flow distribution and collection may be kept in a high accuracy even when the flow amount is small while the increase of the liquid pressure loss may be avoided when the flow amount is large. |
