A water type extinguisher is for class A fires in ordinary solid materials such as wood, paper, textiles and plastics. Balaji's 9 litre water extinguishers have a mild steel body and are listed as ISI. One water type listing (item code BFS-WF9L-2025) names AFFF foam as its agent in the table, so we confirm the charge before supply.
A mechanical foam (AFFF) extinguisher lays a film of foam over burning liquid, so it is used where oils, fuels and other flammable liquids are present as well as on solid material fires. Balaji's portable foam units hold 9 litres in a stored pressure mild steel body; the AFFF 9 litre listing is ISI marked with a fire rating of 3A and 89B, and the M Foam 9 litre listing shows ISI, BIS, ISO and CE.
For large premises, Balaji offers mechanical foam trolley extinguishers of 45 litres (stored pressure, listed as ISI, for class A and B fires) and 50 litres (mild steel, AFFF). Trolley units carry far more agent than a hand held extinguisher and are wheeled to the fire.