| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a fire sprinkler system capable of being controlled by the same control board as a normal pre-action fire sprinkler system including an alarm valve to be opened when a fire sensor is actuated. <P>SOLUTION: The pre-action fire sprinkler system includes the fire sensor, a closed type sprinkler head, and the alarm valve to be opened when the fire sensor and the sprinkler head are both actuated. A signal to open a starting valve 2 from a control board 6 is input to the starting valve 2 via a pressure switch 7 to detect release of pressure within a secondary pipe by the actuation of the closed type sprinkler head. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
