 |
||
|
|
||
| |||||||||||||||
|
|
Combined System A combined system (fig. 8-12) is a special purpose arrangement using two modified dry pipe valves connected to tripping devices and piped in parallel to supply water to the same sprinkler system. The piping net work is filled with air under pressure. When a fire is detected, an exhauster at the end of the system opens and releases the air within the system. The system then operates the same as a pre-action system. However, if the detection system fails, the combined system acts the same as a dry pipe system and allows water to be admitted to the system when the sprinklers open, discharging the air from the piping network.
Figure 8-12.-Combined system header arrangement. |
|
Privacy Statement - Press Release - Copyright Information. - Contact Us - Support Integrated Publishing |
