| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure governor adapted to change a preset value of secondary pressure according to the time zone when the amount of gas used is decreased to prevent the pressure of gas supplied to a customer from being increased in the case where there is a difference in level between the installation position of a pressure governor and a position where the customer is located. SOLUTION: This pressure governor includes an N-AFV governor G, a pilot governor PG for increasing and decreasing the control pressure to operate the N-AFV governor G so that the secondary pressure reaches a first preset pressure, a sub-primary side gas pipe K11, a sub-secondary side gas pipe K12, a sub N-AFV governor SG, a sub-pilot governor SPG for increasing and decreasing the control pressure to operate the sub N-AFV governor SG so that the secondary pressure reaches a second preset pressure lower than the first preset pressure, a motor-driven valve V for opening and closing a pipe K5 for conducting the secondary pressure with the pilot governor PG, and a timer T for operating the motor-driven valve V to be closed in a required time zone.
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