VdS sprinkler systems
– extinguish simply and reliably

Sprinkler systems are used for automatic fire fighting, to protect life and property. The operating principle is straightforward and reliable. It has the largest share of the market for water extinguishing systems. The consistent use of VdS-approved components and careful processing ensures maximum safety and compatibility with international standards.

 

Operational areas and applications
for sprinkler systems:

Benefits of sprinkler systems:

 

The functionality of sprinkler systems

In the case of sprinkler systems, the pipe networks are equipped with sealed nozzles that open individually when heated and the fire water spray is targeted to the fire source. You can fight or extinguish the fire directly at the source as a result of the resulting cooling effect of water evaporation and the subsequent exclusion of air due to the mist. An extinguishing operation is triggered in case of a temperature rise directly at the sprinkler head. This is achieved by the expansion of a liquid or by the separation of a solder joint. The response sensitivity can be influenced by the design of the sprinkler.
An extensive pipeline network with a closed extinguisher nozzle protects the relevant areas. An adequate water supply is provided from compressed air containers, elevated tanks, mains water, master or intermediate containers with pump systems or various combinations of the systems stated above.

The output of a sprinkler system is designed according to the assignment of fire hazards (Low Hazard LH, Ordinary Hazard OH1-4, High Hazard Production, HHP 1-4 & Storage HHS1-4). The indicators for the plant sizing parameters are protection area, water pressure, effective area and operating time.

Depending on the requirements, systems with EFSM (increased water pressure) can be used.

 

Sketch of a sprinkler system

 

The extinguishing principle

In case of fire, one or more sprinklers in the fire area open automatically as a result of the heat. The extinguishing water escapes under pressure and is sprayed on a sprinkler plate; it is then distributed as parabolic drizzle on the fire. In parallel to the opening of the sprinkler an alarm bell and an alarm message will be triggered. Depending on the version of the system, the extinguishing water is first supplied via a compressed air water tank. If the pressure drops, the sprinkler pump is switched on, which pumps the extinguishing water from a water tank.

 

Dry sprinkler systems

Dry systems are installed in frost-prone areas (such as garages
or canopies) and high-temperature rooms (e.g. dryers). In standby mode the pipe network is filled by the sprinklers with compressed air up to the alarm valve. A sprinkler opens due to the heat, the pressure drops in the pipe system, the alarm valve opens and floods the pipe network. This frost resistance is at the price of a prolonged reaction time of sprinkler systems in the event of fire.

 

Wet sprinkler systems

Wet systems are installed area not at risk from frost or overheating. Compared with dry plants they have a shorter delay up to the beginning of the extinguishing process. However, it must be ensured that the ambient temperature does not drop below 5°C. In standby mode the entire pipe network is filled with water under high pressure (10 bar). When a sprinkler is opened, water comes out immediately.



Fire sprinkler

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