◆ It is a pressure signal feedback unit (hereinafter referred to as “feedback unit”) that provides a pair of normally open contacts. When the fire extinguishing agent is released, the pressure inside the pipe network pushes the normally open contacts in the feedback unit to close, and sends a signal back to the fire control center to indicate that the fire in the protected area has been extinguished.
◆The feedback device is installed on the collecting pipe in an independent unit system. In the combined distribution system, it is installed on the outlet of each selector valve or the downstream main pipe. When the feedback device is to be installed on the main pipeline downstream of the header or the selector valve, the connection seat needs to be welded and connected to the pipeline.