CO2 Fire Extinguisher

Description

CO2 fire extinguishers are high-pressure, clean-agent units designed for Class B (flammable liquids) and Class C (electrical) fires, leaving no residue. Recognized by a black label and a long horn nozzle, they operate by smothering fires with CO2 gas and cooling them. Common sizes include 2kg and 5kg, typically made from manganese steel or aluminum.

Description and Characteristics

• Extinguishing Agent: Non-conductive, colorless, and odorless Carbon Dioxide.
• Application: Ideal for electrical equipment (computers, generators) and flammable liquid fires.
• Mechanism: Smothers fire by replacing oxygen and provides cooling, though not for Class A (solid) materials.
• Key Features: No, or very little, residue left behind; no gauge (due to high-pressure liquid state), and a distinct, large “horn” nozzle.

General Specifications

Capacity: 2 kg, 5 kg, 6.5 kg, to 22.5 kg (trolley mounted).

Fire Rating: Typically 34B, 55B, 70B, or 89B depending on size.

Working Pressure: Approximately 55–60 bar.

Operating Temperature: -30C to +60C

Discharge Time: ~8–12 seconds.

Material: Aluminum (lighter) or Manganese/Carbon Steel (heavier).

Safety and Usage

• Safety Warning: The nozzle can become extremely cold and cause freeze burns; only hold the insulated handle.
• Not Suitable For: Class F (cooking oil) fires, as it can scatter burning fat.
• Maintenance: Require annual inspection and hydrostatic testing, often every 5 years.

Typical 5kg CO2 Extinguisher Technical Data

• Gross Weight: ~12 kg to 17 kg.
• Height: ~670 mm - 720 mm.
• Jet Length: ~3.5 meters.