These extinguisher are cylindrical in shape. Outer container is made of mild steel & treated for anti corrosion.Contains 9 ltrs of pure water.The outer container is pressure tested for 350 PSI. CO2 cartridge stored in the cylinder by coupling it to the operating head. Operating head which is with a plunger & striking knob or squeezing lever is screwed to the outer container. The knob is protected with a safety clip or safety pin to prevent accidental operations. There are three vent holes provided on to cap to allow the pressure to be released by which explosion hazard of the extinguisher can be avoided.
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