Amerex 332 20 lb Carbon Dioxide Fire Extinguisher

Amerex 332 is a 20 lb carbon dioxide fire extinguisher. Carbon dioxide is discharged as a white cloud of “snow,” which smothers a fire by displacing oxygen. It is effective for Class B flammable liquids, is electrically non-conductive, and is a clean, non-contaminating, odorless gas that leaves no residue.

Official Amerex model 332, item number 01708. Chrome-plated brass valve with hose and horn. A wall bracket is included (official catalog: 20 lb CO₂ wall). The cylinder is a rust-free aluminum shell; the official catalog notes that these DOT-approved shells have the date stamped on the cylinder shoulder.

Key benefits

• UL and ULC rating 10B:C
• 5-year manufacturer's warranty
• All-metal valve construction and rust-free aluminum cylinders
• Durable high-gloss polyester powder paint
• Temperature range -22°F to 120°F
• Large loop stainless steel pull pin
• QR coded and multilingual labels
• Leaves no residue
• Meets many hospital medical equipment requirements, according to the manufacturer

Typical applications

• Class B flammable-liquid fires
• Fires involving energized electrical equipment, where a clean, electrically non-conductive agent is required
• Amerex also recommends models 330, 331, and 332 for mechanical, electrical, and elevator equipment rooms and for laboratories in its health-care facility selection guide

How to use

Persons expected to use this extinguisher shall be trained. Follow the extinguisher nameplate and the official owner's manual. Carbon dioxide extinguishes fires by diluting the surrounding atmosphere with inert gas, keeping the oxygen level below the percentage required for combustion. When it is used in an unventilated space, such as a small room, closet, or other confined area, prolonged occupancy of that space can result in loss of consciousness due to oxygen deficiency. Avoid skin contact — CO₂ is extremely cold and could cause burns or frostbite.

1. Remove the extinguisher from the wall hanger or vehicle bracket and move it to within approximately 10 feet (3 m) of the fire site (manufacturer distance for 10, 15, and 20 lb models).
2. Hold the extinguisher upright, twist and pull the pull pin.
3. Stand back 10 feet (3 m) from the fire and aim the horn at the base of the flames nearest you. Hold the horn on the hand grip only — grasping the horn or swivel discharge tube could cause a cold burn.
4. Keeping the extinguisher upright, sweep side to side across the base of the fire and past both edges. Progressively follow up until the fire is extinguished. Work the fire away from you while being alert for flashbacks. Move closer as the fire is extinguished, but not so close as to scatter or splash the burning materials.
5. When the fire is out, release the valve lever to stop discharge. Stand by and watch for possible reignition.
6. Evacuate and ventilate the area immediately after extinguishing the fire. The fumes and smoke from any fire may be hazardous and can be deadly.

Specifications

The official catalog states that these extinguishers are manufactured and tested to UL standards, comply with NFPA 10, are ISO-9001/ISO-14001 certified and UL listed, and conform to test standards CAN/ULC-S503 / UL 154 and CAN/ULC-S508 / UL 711. USCG approval with the bracket listed on the UL label is a catalog option and is not claimed here unless it appears on the unit's UL label.

Product information summarized from the manufacturer (Amerex Corporation, amerex-fire.com, Hand-Portable Fire Extinguishers catalog, official webstore item 01708, healthcare facility selection guide, owner's manual 05603, and the carbon dioxide SDS). Always follow the label and Safety Data Sheet.

Documents

• Safety Data Sheet (SDS) — Carbon Dioxide (CO₂) — official manufacturer PDF
• Owner's Service Manual PN 05603 — carbon dioxide portable extinguishers (models 321M, 322, 322NM, 330, 331, 332) — official manufacturer PDF