Dry chemical powder automatic extinguishing systems are a extinguishing system that can be used both in total volume protection and in local protection applications.
The purpose of automatic dry chemical extinguishing system is to make a protection that will cover total volume protection. For this reason, the design is made according to the criteria such as the volume, height, average temperature and the ratio of the openings that cannot be closed.
Automatic dry chemical extinguishing system is used in order to provide a more suitable and economical extinguishing system according to the characteristics of the area to be protected in local protection and in areas where the total volume protection cannot be applied, where the risk area is smaller. It is the ideal method that is applied in open risk areas, outside the boundaries of the area to be protected and above the volume protection. Apply according to the condition of the risk in the area to be applied, over the area protection or side area protection.
Dry chemical extinguisher systems break the chemical reaction chain formed during the fire, stop the ignition and, in addition, form a layer on the combustion substances and stop the contact of the flames with air. The dry chemical, which is discharged to the entire volume with the volume protection method, creates an atmosphere where combustion cannot continue in the environment. In liquid fires protected by locak application method, dry chemical fire extinguisher forms a soapy layer on the liquid surface to interact with flammable liquid. This layer also allows the surfaces to cool. It prevents the liquid to reignite.
Scope of application
- Open and closed paint cabinets
- Immersion tanks
- Coating machines
- Drying ovens
- Industrial storage and processing areas
- Flammable liquid tanks
- Material stores
- Printing machines
- Accumulation containers where flammable liquids are collected
- Mixing tanks
- Generator rooms
- Pump rooms
- Board rooms
- Transformer rooms
- Turbine generators
Main parts that make up the dusty fire extinguishing system
- Cylinders where dry chemical is stored: filled at the factory; valve parts (pressure gauge, safety valve etc.); Complete with label; 30, 50,100,250,500 and 1000 kg. in capacity
- Discharge device: mechanically or electrically activated
- Nozzles: local application nozzles and total application nozzles
- Sensing elements: fusible links, detectors (heat, flame)
- Detection, activation and discharge lines
In case of fire, when it is detected with mechanically fusible links or detectors, it sends a warning to the activation mechanism of the cylinder to a panel. The burst disk in the mouth of the pilot cylinder is pierced and the nitrogen pilot cylinder solenoid valve is activated. The dry chemical extinguisher cylinder was pre-pressurized with nitrogen gas. Reliased nitrogen gas opens the valve of the dry chemical cylinder by the pressure. Pneumatically opened valve is filled with pressurized dry chemical discharge line and discharged from the nozzles into the area.
The system can operate completely automatically or it can be activated manually.