| 摘要 |
In an alarm valve for permanently installed fire-extinguishing systems, having a blocking element mounted in a valve housing with an inlet and outlet and which tightly blocks the open cross-section of the housing and locking and release mechanism integrated into the valve, the improvement wherein the locking and release mechanism comprises at least one radial depression at the open cross-section of the valve mounting, at least one locking element engageable with the at least one depression to lock the blocking element in a blocking position. The locking element is maintained in the engaged position against the pressure of an extinguishing fluid in response to the pressure of a gas or mixture of gases exceeding a predetermined level which is weaker than the pressure of the extinguishing fluid.
|
