| 摘要 |
PURPOSE:To eliminate the pressure shortage of a downstream area owing to the resistance of a pipeline by providing a throttle at the front or back side of the port of a pilot operated reducing valve and energizing the 2nd pressure receiver which works with the difference voltage produced by said throttle up to a fixed level of weighting. CONSTITUTION:A pressure receiving part 6 having a valve body 7 which is pressed by the pressure of a pressure chamber 3 is provided to a pilot operated reducing valve together with a valve port 8 which is opened by the valve body 7. In addition, a spring 10 which works against the force of a pressure receiver 9 for the pressure generated at the secondary side 14 is provided together with a pilot valve matter 11 which works in response to the difference of source between the matter 9 and the spring 10. A throttle 17 is set at the front or back side of the port 8, and at the same time the 2nd pressure receiver 18 which works with the difference voltage produced by the throttle 17 is provided. The receiver 18 is energized with a fixed level of weighting of the spring 10, etc. Thus it is possible to eliminate the reduction of pressure of a downstream area 15 owing to the resistance of a pipeline 16. |
