What is the main characteristic of deluge sprinkler systems?

Deluge sprinkler systems are unique in their operation, and their primary characteristic is that water flows from all sprinkler heads simultaneously when activated. This is typically initiated by an external fire detection system rather than the sprinkler heads themselves, which do not have individual activation mechanisms like traditional sprinkler systems. When a deluge system is triggered, it releases a large volume of water across the area, making it particularly effective in scenarios involving large-scale fires or hazardous materials where rapid suppression is necessary.

In contrast to other sprinkler systems that may flow water from a single head or be triggered by localized conditions, the deluge system's design is specifically for situations where immediate and widespread water application is needed for fire control. This characteristic is essential for providing enhanced fire protection in environments like aircraft hangars, warehouses, and industrial settings.