Product description

The pre-action device (flange) is the main component of the pre-action water spray system. It is composed of pre-action alarm valve group, control panel, air pressure maintaining device and air supply device. It is opened by electric or manual method, so that water can flow into the water spray system in one direction while alarming at the same time. The pre-action system combines the fire detection and sprinkler system to provide double protection for the protected object. When there is no fire, the system side pipeline is inflated, and the deluge valve seals the water on the water supply pipeline. After a fire occurs, the control center sends a start signal to the pre-action device, the pre-action device is opened, and the system is converted to a wet pipe network. It is suitable for important places where cold, freezing, high temperature, avoiding water stains, and not allowing accidental spraying of water. Such as libraries, computer rooms, underground garages in cold areas, etc.

Product size chart

Main external connection size