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Dondequiera que se tuesten los granos de cacao, el riesgo de incendio por sobrecalentamiento de la grasa es particularmente alto. El Los sistemas de tostado utilizan a menudo el vapor como fuente de calor para el aire de tostado y puede ocurrir muy rápidamente que las boquillas y las tuberías obstruidas Las boquillas y los estrechamientos de las tuberías se sobrecalientan debido a la grasa y el sistema se incendia.
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