Unité d'extinction pour griller les fèves de cacao
Partout où les fèves de cacao sont torréfiées, le risque d'incendie dû à la graisse surchauffée est particulièrement élevé. Les installations Les installations utilisent souvent la vapeur comme source de chauffage de l'air de torréfaction et il peut très vite arriver que les foyers obstrués se remplissent de graisse. Les buses et les rétrécissements de tuyaux peuvent être surchauffés par les graisses et l'installation peut prendre feu.
A water fire-fighting-system with special type solenoid valves has been designed to prevent the risk of fire.
The safety concept provides for electric opening of the NC-valves in case of fire whereby a spring-loaded pin is blocked in its position so that opening is ensured during fire fighting even if electrical units have already been destroyed by the fire.
In normal operation the solenoid valves are always closed for a long period (unless the system catches fire). Furthermore the valves are equipped with an electrical position indicator for status display.
Once the solenoid valves have been released their closure is only possible in a combination of "currentless state' and "pushing the reset button".
Developed, tested and successfully used:
Typ : 1/932-24-1001-.322-E6 24VDC 30Watt
- Diaphragm Valve
- NC - normally closed with spring
- threaded ends G3/4 or 3/4NPT
- 0-6 bar
- brass / perbunan