Shaoxing Weimin Fire Fighting Equipment Co., Ltd. is one of the most reliable manufacturers and suppliers of dry chemical fire extinguishers in China. If you're going to wholesale bulk CE and ISO approved dry chemical fire extinguishers, welcome to get pricelist and free sample from our factory. All customized products are with high quality and low price.

What the product is made of

Each extinguisher is composed of controlled mechanical and material systems:

Cylinder body:

carbon steel deep-drawn shell, wall thickness 1.2–2.5 mm depending on pressure class

Internal coating:

epoxy resin layer to isolate powder from moisture and metal oxidation

Valve assembly:

brass/aluminum alloy structure with mechanical trigger control

Dip tube:

polymer or aluminum tube guiding powder flow from bottom reservoir

Pressure system:

nitrogen gas charging system maintaining 12–15 bar internal pressure

Nozzle/hose:

rubber composite hose (operating range -30°C to +60°C)

👉 The system is designed as a sealed pressure transfer mechanism, not an open container.

How extinguishing happens physically

When the valve is activated, compressed nitrogen pushes powder through the dip tube and nozzle.

The extinguishing process includes three physical actions:

Surface coating: powder particles attach to burning material and block oxygen diffusion
Flame chain interruption: chemical radicals in combustion zone are suppressed by powder reaction
Thermal dispersion: solid particles absorb heat and reduce local flame temperature gradient

Standard discharge time:

6 kg unit: 8–15 seconds (depending on nozzle diameter 6–8 mm)

👉 The system does not "cool fire", it interrupts combustion chemistry + oxygen access simultaneously.

Fire Class Application Matrix

A-Class (solid combustion)

Material: wood pallets, paper stacks, textile waste

Temperature: ignition above ~250°C

Action: powder forms barrier layer and blocks oxygen supply

B-Class (liquid combustion)

Material: gasoline, diesel, lubricating oil

Flash point: 40–200°C

Action: suppresses vapor flame above liquid surface

C-Class (gas ignition)

Medium: LPG, methane leakage

Pressure: 2–8 bar release environment

Action: disperses flame jet and stops combustion continuity

👉 Product selection is defined by fire class + filling mass + valve system, not generic usage description.

Weimin Manufacturing Control

Weimin operates a segmented industrial production system, not mixed assembly:

Cylinder forming (steel deep drawing + seam welding)
Hydrostatic pressure test at ≥1.5× working pressure (18–22 bar range)
Internal epoxy coating curing for corrosion isolation
Vacuum-assisted powder filling (reduces moisture and air inclusion)
Valve torque-controlled assembly (mechanical calibration)
Nitrogen pressurization (12–15 bar standard range at 20°C)
Final inspection (pressure + weight verification)

Each batch is recorded with traceable production ID and inspection report.

Installation & System Integration

Installation is designed for industrial and commercial safety layouts:

Wall mounting: M8 expansion bolts on concrete or steel structure
Vehicle installation: vibration-resistant dual-point bracket system
Industrial placement: floor-mounted within ≤1.2 m access distance

Operational access requirement:

Activation response: 2–3 seconds mechanical trigger
Discharge time: 8–15 seconds depending on configuration
Mounting height: 0.8–1.2 m from ground to handle

Maintenance & Lifecycle Management

Operational lifecycle is defined by measurable indicators:

Monthly: pressure gauge inspection (green zone stability 10–15 bar)
Yearly: weight verification (loss threshold ≤5%)
3–5 years: powder replacement cycle (depends on regulation)
10–12 years: cylinder service life under pressure vessel standards

👉 Lifecycle cost is determined by refill cycle + pressure stability + valve durability.

Weimin Engineering Advantages

Weimin provides production control beyond assembly-level manufacturing:

Independent cylinder welding and coating line separation
Batch-level powder filling with humidity isolation system
Multi-line parallel production for large-volume orders
Full traceability system (cylinder + valve + filling batch)
Export labeling customization (multi-language marking system)

👉 These systems reduce inconsistency risk in large container shipments.

Technical Specifications

Dry Powder Weight	Out-diameter	Cylinder Height	Cylinder Weight	Extinguisher Weight	Material	Max Working Pressure	Test Pressure	Temperature Range	Carton Size	Gross Weight
1 kg	90 mm	235 mm	0.55 kg	1.85 kg	St12	14 Bar	25 Bar	-30°C ~ +60°C	21 × 51 × 31 cm / 10 pcs	19.0 kg
2 kg	110 mm	305 mm	0.93 kg	3.35 kg	St12	14 Bar	25 Bar	-30°C ~ +60°C	35.5 × 23.5 × 40 cm / 6 pcs	21.0 kg
4 kg	130 mm	400 mm	0.55 kg	1.85 kg	St12	14 Bar	25 Bar	-30°C ~ +60°C	15 × 15 × 49 cm / pc	6.4 kg
6 kg	160 mm	430 mm	2.1 kg	8.5 kg	St12	14 Bar	25 Bar	-30°C ~ +60°C	16 × 16 × 51 cm / pc	8.8 kg
9 kg	182 mm	490 mm	3.25 kg	12.7 kg	St12	14 Bar	25 Bar	-30°C ~ +60°C	20 × 20 × 59 cm / pc	13.0 kg
12 kg	180 mm	600 mm	3.95 kg	16.45 kg	St12	14 Bar	25 Bar	-30°C ~ +60°C	20 × 20 × 69 cm / pc	17.0 kg

FAQ

Q1: What certification is required for import?

A1: Certification depends on destination market. Typical requirements include EN3 (EU), CE marking, and pressure vessel conformity test records. Weimin provides batch inspection documentation for customs clearance.

Q2: What is the difference between ABC and BC powder?

A2: ABC powder (ammonium phosphate) covers solid, liquid, and gas fires. BC powder (sodium bicarbonate) is optimized for liquid and gas combustion without solid fuel coverage.

Q3: Can the extinguisher be refilled after use?

A3: Yes. The cylinder is designed as a refillable pressure vessel. After discharge, valve inspection and powder refilling are required before re-pressurization.

Q4: What causes pressure loss during storage?

A4: Main causes include valve seal aging and micro-leakage in nitrogen system. Weimin uses torque-controlled sealing and batch pressure retention testing to reduce this risk.

Q5: What is the expected service life?

A5: Cylinder life is typically 10–12 years depending on local pressure vessel regulation. Maintenance cycle depends on environmental conditions and usage frequency.

Q6: Can packaging withstand sea freight?

A6: Yes. Units are packed with impact-resistant cartons and fixed internal brackets to prevent valve movement during container vibration and stacking.

Request Technical Quote & Sample

If you are sourcing fire extinguishers for:

Industrial safety distribution • Building contractor supply chains • Government or municipal procurement • OEM fire safety product branding

Weimin provides:

Batch-level production scheduling for container orders • OEM labeling and multilingual marking • Full inspection documentation • Export compliance support

👉 Send your requirement (fire class, capacity, destination market). We will provide configuration recommendation + FOB quotation + certification package list within production scope.

Contact Weimin Fire Fighting Equipment for RFQ

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