Fireworks designed and installed a High Pressure Watermist fire protection systems for Heinz to protect their deep fat fryers from the risk of fire at their factory in Norfolk. Heinz process roast potatoes under the Aunt Bessey brand.

Within the factory there were several large industrial deep fat fryers which Heinz chose to upgrade to a high pressure watermist fire protection systems following a number of fires which had not been successfully extinguished with CO2 systems. The Watermist system had undergone extensive fire testing and research which proved that it is far more effective in preventing re-ignition of industrial deep fat fryer fires than the CO2 systems which were previously installed.

Description of Solution
The deep fat fryers are contained in the centre of the factory and adjacent to other process machines. Each fryer measured around 8 metres in length and contained nearly 2 tonnes of oil. The system had been designed to protect under each fryer canopy, within each exhaust duct, around the in and out feed areas and over each fines box area all connected to a common pump unit located in the plant room.

Each fryer had its own dedicated fire detection system controlling the pump unit and a zone valve to direct the water mist to the affected fryer.


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