Portable fire extinguisher using foam - has metal body with synthetic resin internal lining and synthetic resin head to avoid corrosion (SW 5.12.77)

摘要

The fire extinguisher is portable and contains a foam liquid, expelled by a propulsive medium under pressure in a bottle. The body of the extinguisher is made from metal and coated internally with a lining of synthetic resin to avoid any corrosive effect by the foam. Equally, th ehead of the extinguisher is also made from synthetic resin. This holds the pressure bottle, a diaphragm being punctured by a pointed rod pushed down externally after removing a pin. An excess pressure safety valve is fitted in the discharge, a plunger being forced upwards to puncture another diaphragm and open the outlet.