Pre-action Sprinkler System
A pre-action sprinkler system is a type of fire suppression system that combines features of dry and wet sprinkler systems. The system is designed to reduce the risk of accidental discharge of water by requiring two independent events to occur before water is released.
A pre-action sprinkler system consists of a piping system that is connected to a water supply and a detection system. The detection system is typically a smoke or heat detector that is activated by the presence of fire. When the detection system is activated, a pre-action valve opens, allowing water to flow into the piping system. However, the water is held back by a pre-action valve, which is designed to prevent water from entering the piping system until a second event occurs.
The second event is typically the activation of one or more sprinkler heads. When a sprinkler head is activated by heat, the pre-action valve is tripped, allowing water to flow into the piping system and through the activated sprinkler heads.
Pre-action sprinkler systems are often used in facilities that house valuable or sensitive equipment, such as data centers, museums, and art galleries, where water damage from accidental sprinkler activation must be avoided.
Proper installation, testing, and maintenance of pre-action sprinkler systems are critical to ensure their reliability and effectiveness. Regular inspections, testing, and repairs can help identify and address any issues that may impact the system's performance in the event of a fire. The system must also comply with local building codes and regulations, which often include requirements for backflow prevention and regular testing.