Top 5 Trolley CO2 Fire Extinguisher Manufactuters in China

A trolley CO2 fire extinguisher is a mobile high-pressure gas discharge system composed of a seamless steel CO2 cylinder, brass valve assembly, high-pressure hose, discharge horn, and steel trolley frame with load-bearing wheels. The cylinder typically operates at 50–60 bar internal pressure at 20°C and must pass hydrostatic testing to verify plastic deformation limit and weld integrity before CO2 filling.

When the valve is opened, liquid CO2 inside the cylinder undergoes rapid phase expansion from liquid to gas. This phase change absorbs heat energy and reduces oxygen concentration below combustion-supporting levels. The system is applied in enclosed electrical fire zones where residue-free suppression is required, such as UPS rooms, transformer stations, and generator control rooms.

The trolley CO2 system operates through a sealed pressure transfer chain:

1 CO2 cylinder stores liquefied gas under 50–60 bar pressure

2 Brass valve controls gas release and sealing closure

3 Dip tube conducts liquid CO2 from cylinder bottom

4 Reinforced hose resists internal burst pressure ≥ 120 bar

5 Discharge horn directs gas expansion flow toward fire zone

During activation, internal pressure forces CO2 through the valve orifice. The sudden pressure drop induces Joule-Thomson cooling, reducing gas temperature to approximately -78°C at discharge outlet. This cooling effect contributes to flame suppression in electrical cabinet fire scenarios.

Valve sealing interface (rubber/PTFE degradation under pressure cycling)
Cylinder neck thread fatigue under vibration transport
CO2 overfilling leading to pressure surge under temperature rise above 30°C

Trolley CO2 extinguishers are installed in environments where water or powder residue cannot be tolerated:

Configured with energized copper busbars requiring strict non-conductive suppression variables.

Operating under continuous 220–380V workload thresholds where secondary chemical damage must be averted.

Designed for enclosed diesel ignition points demanding high gas expansion density.

Protecting oxygen-sensitive equipment infrastructures without introducing active agents.

The trolley system is positioned at 1–3 meters from protected equipment. During maintenance, operators check cylinder mass loss using weighing scales; a deviation above 5% may indicate micro-leakage at valve sealing or neck thread interface.

The rankings are in no particular order.

Ningbo Xinhao Fire Fighting Equipment Co., Ltd. produces trolley CO2 fire extinguishers designed for industrial electrical fire suppression systems using seamless steel pressure cylinders and brass valve assemblies.

Core system configuration:

25kg / 45kg / 50kg / 70kg CO2 trolley extinguishers
Seamless steel cylinder rated at 50–60 bar working pressure
Brass valve with safety rupture disk and sealing gasket system
High-pressure discharge hose with burst pressure ≥ 120 bar
Steel trolley frame with welded load-bearing structure

Manufacturing and control process:

Cylinder forming → heat treatment → hydrostatic pressure test → valve assembly → CO2 filling → weight calibration → leakage inspection → trolley integration

Each cylinder is tested under hydrostatic pressure before CO2 filling to verify deformation resistance. CO2 filling is controlled by weight measurement system to reduce overpressure risk during ambient temperature fluctuation above 30°C.

Cylinder pressure rating adjustment: Based on project fire code requirements.
Valve interface adaptation: Modified for different regional certification systems.
Trolley wheel load design: Formulated for uneven industrial flooring conditions.
CO2 filling mass adjustment: Calibrated for precise discharge duration control (typically 30–90 seconds).
OEM labeling system: Full alignment with required export project documentation.

These configurations are used in electrical fire suppression systems where discharge residue must not conduct electricity or contaminate copper contact surfaces.

Beifeng manufactures trolley CO2 systems using welded steel cylinders with post-weld heat treatment to reduce residual stress concentration. The production line includes valve torque calibration and pressure retention testing under 24-hour holding conditions. The system is applied in industrial compressor stations where CO2 discharge must maintain stable pressure flow through long hose routing.

Zhonglian produces medium-capacity CO2 trolley extinguishers with emphasis on valve sealing systems using PTFE gasket structures. Cylinder bodies are tested under repeated pressurization cycles between 10–60 bar to simulate transport vibration conditions. Applications include warehouse electrical control zones with intermittent high-load equipment operation.

Huanyu focuses on export-oriented CO2 trolley extinguishers with TPED-aligned cylinder validation processes. The manufacturing line includes multi-stage pressure verification and thread inspection using calibrated gauges. Products are integrated into EU-compliant fire protection systems for electrical infrastructure projects.

Yongan produces stainless steel reinforced trolley CO2 systems for high-humidity environments. The cylinder surface uses corrosion-resistant treatment to reduce oxidation rate under RH > 80% conditions. These systems are installed in coastal substations and shipboard electrical control rooms where salt fog exposure affects carbon steel cylinder stability.

Price differences between manufacturers are determined by measurable engineering variables:

• Cylinder construction method: Seamless steel vs welded steel affects pressure integrity and material yield rate.

• CO2 filling mass accuracy: Weight-controlled vs volume estimation changes long-term discharge stability.

• Valve machining process: Forged brass vs cast brass affects sealing fatigue performance under pressure cycling.

• Hose pressure rating: Burst pressure ≥ 100–120 bar bounds the limits of integrated material reinforcement layers.

• Certification depth: Basic factory leak testing vs full external TPED/CE pressure vessel compliance testing.

Each variable affects pressure containment behavior and discharge consistency under operational temperature variation.

Top 5 Trolley CO2 Fire Extinguisher Manufactuters in China

Choose based on fire size and required discharge time. Common options are 25kg–70kg, with larger units used for generator rooms, switchgear, and industrial electrical zones needing longer CO₂ coverage.

CO₂ cylinders typically operate at 50–60 bar at 20°C. Buyers should confirm hydrostatic test results above working pressure to ensure safety under storage and transport conditions.

Main issues include valve sealing leakage, overpressure from incorrect filling, hose wear under high-pressure flow, and thread fatigue caused by vibration during transport.

Usually CE, TPED, ISO 9001, plus cylinder hydrostatic test reports and valve safety documentation for customs clearance and project approval.

Yes. Capacity, valve interface, hose length, trolley frame, CO₂ filling weight, and labeling can be adjusted based on project requirements and target market standards.

Provide capacity, application scenario, certification requirement, order quantity, discharge time requirement, and OEM needs to define correct cylinder and filling configuration.

For engineering quotation preparation, procurement teams must define system parameters before cylinder production starts:

• Required CO2 capacity (25kg–70kg system range)
• Installation environment (electrical room / generator room / data center)
• Certification requirement (CE / TPED / ISO system compliance)
• Discharge duration requirement (30–90 seconds typical range)
• OEM and labeling specification

Ningbo Xinhao Fire Fighting Equipment Co., Ltd. performs comprehensive configuration verification before production, including cylinder pressure rating selection, CO2 mass calibration, and trolley structural load design. This ensures that pressure vessel behavior, discharge flow rate, and transport stability match project-level fire suppression requirements rather than standard catalog assumptions.

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