10LB Amerex 330 - CO2 Fire Extinguisher - OEM

The Amerex 330 is a professional-grade, 10 lb Carbon Dioxide (CO2) fire extinguisher engineered for environments where the cleanup cost after a discharge is often more expensive than the fire itself. In modern laboratories, data centers, and surgical suites, the abrasive residue of a multipurpose dry chemical agent can be as financially devastating as the fire event. The Amerex 330 eliminates this risk by utilizing industrial-grade CO2 — a clean agent that vanishes instantly after discharge, leaving zero residue and requiring no post-fire remediation.

Rated 10-B:C, the Amerex 330 is specifically designed for Class B flammable liquid fires and Class C energized electrical equipment. As the mid-sized unit in the Amerex CO2 lineup, the 10 lb capacity provides 10 to 12 seconds of discharge — nearly twice the suppression time of compact 5 lb units — while remaining light enough for rapid manual deployment. Built with a rust-free aluminum cylinder and a heavy-duty all-metal valve assembly, the 330 is an indispensable asset for facilities requiring non-contaminating fire suppression for high-value infrastructure.

The Physics of Clean Suppression: Displacement and Sublimation

1. Atmospheric Oxygen Displacement

Combustion requires a minimum of 16% oxygen to continue. When the Amerex 330 is activated, it floods the hazard zone with a concentrated cloud of CO2, rapidly dropping the local oxygen level below the threshold of combustion. Because CO2 is 1.5 times heavier than air, it sinks into floor voids and server cabinets, providing deep coverage in enclosed electrical spaces.

2. The Snow and Sublimation

As the liquid CO2 exits the specialized discharge horn, it undergoes a rapid pressure drop, turning into a mixture of gas and dry ice snow at approximately -78.5°C. This snow quickly sublimates — converting directly from solid to gas — absorbing large amounts of thermal energy. While the primary suppression method is oxygen exclusion, this extreme cold provides a secondary endothermic cooling effect on overheating components.

3. Dielectric Integrity (Class C)

Carbon dioxide is naturally non-conductive and non-corrosive. This allows an operator to safely engage fires in live 480V panels or medical imaging equipment without risk of electrical flashover — a core requirement for high-voltage electrical environments and healthcare facilities.

Why the Amerex 330 is the B2B Strategic Choice

• Zero-Residue Logistics: Following a discharge, there is no powder to vacuum and no corrosive film to scrub. For a semiconductor clean room or laboratory, this prevents significant decontamination costs that would follow a dry chemical discharge.
• Capacity-to-Weight Ratio: The 10 lb agent capacity provides 10 to 12 seconds of discharge — critical time for arresting thermal runaway in overheated electronic components or suppressing a developing flammable liquid fire.
• Rust-Free Aluminum Construction: The aluminum cylinder body is naturally rust-resistant, maintaining structural integrity and professional appearance even in humid mechanical rooms and laboratory environments.

The Amerex 330 is the primary specified choice for low-contamination hazard zones where clean agent suppression is mandatory:

• Surgical Suites and MRI Rooms: Essential for protecting surgical lasers and medical imaging equipment where chemical residue would require total room decontamination.
• Laboratories and Research Facilities: Protecting delicate glass apparatus and precision instrumentation from the abrasive cloud of dry chemical agents.
• Electrical Control Rooms: Used near high-voltage panels and CNC machinery controllers for clean, zero-residue suppression on energized equipment.
• Telecommunications Facilities: Protecting switching gear and network infrastructure where continuity of service is the primary concern.
• High-Density Data Centers: Providing protection for server racks without risking damage to circuit boards or sensitive silicon components.

To maintain NFPA 10 compliance and ensure your facility remains insurance-eligible, the 330 must follow a strict maintenance protocol:

• Monthly Visual Inspection: Verify the safety seal is intact and the discharge horn is clear of obstructions. Confirm inspection tags are current.
• Annual Professional Service: A technician must verify the unit's weight. CO2 units are checked by gross weight verification — there is no pressure gauge, so weight is the only accurate indicator of a full charge.
• 5-Year Hydrostatic Test: Mandatory every five years for aluminum CO2 cylinders to ensure structural safety under the unit's high operating pressure.
• Confined Space Warning: Because CO2 displaces oxygen, the area must be ventilated immediately after any discharge and personnel must not re-enter until oxygen levels are confirmed safe.

Why doesn't this extinguisher have a pressure gauge?

CO2 exists in liquid-vapor equilibrium inside the cylinder — the pressure remains nearly constant until the liquid charge is nearly exhausted, making a pressure gauge unreliable as a readiness indicator. The only accurate check is gross weight verification, which is why annual service for CO2 units involves weighing rather than gauge reading.

Is this safe for electronics?

Yes. CO2 is non-abrasive and leaves no residue. Unlike ABC dry chemical powder, it will not scratch optical lenses, bridge circuit board traces, or damage sensitive components. After discharge and ventilation, equipment can often be inspected and returned to service without extensive cleanup.

Will the discharge horn get cold enough to cause injury?

Yes. The rapid CO2 expansion can cause the discharge horn to drop to approximately -78.5°C. The Amerex 330 features a non-conductive discharge horn with an insulated handle — always grip the insulated handle, never the horn itself, to avoid frostbite during operation.