Shaoxing Weimin Fire Fighting Equipment Co., Ltd. is one of the most reliable manufacturers and suppliers of 20 lbs powder fire extinguisher(usa module) in China. If you're going to wholesale bulk CE and ISO approved 20 lbs powder fire extinguisher(usa module), welcome to get pricelist and free sample from our factory. All customized products are with high quality and low price.

Product Architecture Overview

The 20 LBS dry chemical fire extinguisher (USA module) is a 9 kg ABC powder pressurized discharge device built around a steel pressure cylinder + nitrogen gas propulsion system, designed for US-style installation layouts.

The structure consists of:

cylindrical steel shell (carbon steel pressure vessel)
internal powder storage chamber filled with ABC dry chemical agent
dip tube connecting powder reservoir to valve outlet
brass manual valve assembly for mechanical opening and sealing
nitrogen pressurization chamber maintaining 195–240 PSI working pressure range

The system is designed to store solid powder under gas pressure and release it through mechanical valve opening without external energy input.

Technical Specifications

Model	I-10-G	I-A-10-G	I-K-10-G	I-20-G	I-A-20-G	I-K-20-G	I-30-G	I-A-30-G	I-K-30-G
Agent	PLUS-FIFTY C	FORAY	Purple-K	PLUS-FIFTY C	FORAY	Purple-K	PLUS-FIFTY C	FORAY	Purple-K
Capacity	10 lb (4.5 kg)	8.5 lb (3.7 kg)	9 lb (4.1 kg)	20 lb (9.1 kg)	17 lb (7.7 kg)	18 lb (8.2 kg)	30 lb (13.6 kg)	25 lb (11.3 kg)	27 lb (12.3 kg)
UL Rating (USA)	30-B:C	4-A:40-B:C	60-B:C	40-B:C	10-A:60-B:C	80-B:C	60-B:C	20-A:80-B:C	120-B:C
ULC Rating (Canada)	30-B:C	3-A:40-B:C	60-B:C	40-B:C	10-A:80-B:C	80-B:C	40-B:C	10-A:80-B:C	120-B:C
US Coast Guard Classification	Type B:C, Size II	Type A, Size II Type B:C, Size II	Type B:C, Size II	Type B:C, Size III	Type A, Size II Type B:C, Size II	Type B:C, Size III	Type B:C, Size IV	Type A, Size II Type B:C, Size III	Type B:C, Size IV
Discharge Time	11 seconds	15 seconds	19 seconds	13 seconds	20 seconds	21 seconds	17 seconds	25 seconds	27 seconds
Flow Rate	0.86 lb/s (0.39 kg/s)	0.63 lb/s (0.29 kg/s)	0.51 lb/s (0.23 kg/s)	1.34 lb/s (0.61 kg/s)	0.91 lb/s (0.41 kg/s)	0.90 lb/s (0.41 kg/s)	1.77 lb/s (0.80 kg/s)	1.02 lb/s (0.46 kg/s)	1.03 lb/s (0.47 kg/s)
Effective Range	21 ft (6.4 m)	17 ft (5.2 m)	25 ft (7.6 m)	24 ft (7.3 m)	20 ft (6.1 m)	30 ft (9.1 m)	23 ft (7.0 m)	20 ft (6.1 m)	30 ft (9.1 m)
Nozzle Jet Type	Conical	Conical	Conical	Conical	Conical	Conical	Conical	Conical	Conical
Optional Features
• Low temperature (down to -65°F / -54°C)	N/A	X	N/A	N/A	X	X	N/A	X	X
• Corrosion resistant	N/A	X	X	X	X	X	X	X	X
• Needle valve	X	X	X	X	X	X	X	X	X
• High flow rate	N/A	N/A	N/A	N/A	X	X	N/A	X	X
Optional Flow Rate	-	-	-	-	1.55 lb/s (0.70 kg/s)	1.55 lb/s (0.70 kg/s)	-	2.10 lb/s (0.95 kg/s)	2.35 lb/s (1.10 kg/s)
Optional Effective Discharge Time	-	-	-	-	12 seconds	12 seconds	-	12 seconds	12 seconds
Optional Effective Range	-	-	-	-	15–20 ft (4.6–6.1 m)	15–20 ft (4.6–6.1 m)	-	15–20 ft (4.6–6.1 m)	15–20 ft (4.6–6.1 m)
Optional Classification	-	-	-	-	1-A:20-B:C	20-B:C	-	1-A:20-B:C	20-B:C
Certifications	UL, FM, USCG**	UL, FM, USCG**	UL, FM, USCG**	UL, FM, USCG**	UL, FM, USCG**	UL, FM, USCG**	UL, FM, USCG**	UL, FM, USCG**	UL, FM, USCG**
Mounting Brackets
• Universal bracket***	14228	14228	14228	14091	14091	14091	14098	14098	14098
• High resistance bracket***	30886	30886	30886	3075	30759	30759	30889	30889	30889
• High resistance ring pass-through bracket	N/A	N/A	N/A	15665	15665	15665	25428	25428	25428
Full Charged Weight	22 lb (10.0 kg)	20.5 lb (9.3 kg)	21 lb (9.5 kg)	38 lb (17.2 kg)	35 lb (15.9 kg)	36 lb (16.3 kg)	54.5 lb (24.7 kg)	49.5 lb (22.5 kg)	51.5 lb (23.4 kg)
Dimensions
Height	16.1" (40.9 cm)	16.1" (40.9 cm)	16.1" (40.9 cm)	20.5" (52.1 cm)	20.5" (52.1 cm)	20.5" (52.1 cm)	22.5" (57.2 cm)	22.5" (57.2 cm)	22.5" (57.2 cm)
Width	8.3" (20.9 cm)	8.3" (20.9 cm)	8.3" (20.9 cm)	10.4" (26.4 cm)	10.4" (26.4 cm)	10.4" (26.4 cm)	11.1" (28.3 cm)	11.1" (28.3 cm)	11.1" (28.3 cm)
Depth	5.3" (13.3 cm)	5.3" (13.3 cm)	5.3" (13.3 cm)	7.0" (17.8 cm)	7.0" (17.8 cm)	7.0" (17.8 cm)	8.0" (20.3 cm)	8.0" (20.3 cm)	8.0" (20.3 cm)
Hose Inner Diameter	0.4" (0.9 cm)	0.4" (0.9 cm)	0.4" (0.9 cm)	0.5" (3 cm)	0.5" (1.3 cm)	0.5" (1.3 cm)	0.6" (1.6 cm)	0.6" (1.6 cm)	0.6" (1.6 cm)
Hose Length	26.6" (67.6 cm)	26.6" (67.6 cm)	26.6" (67.6 cm)	31.6" (80.3 cm)	31.6" (80.3 cm)	31.6" (80.3 cm)	35.6" (90.5 cm)	35.6" (90.5 cm)	35.6" (90.5 cm)
Cylinder Outer Diameter	4.9" (12.4 cm)	4.9" (12.4 cm)	4.9" (12.4 cm)	6.0" (15 cm)	6.0" (15 cm)	6.0" (15 cm)	7.0" (17.5 cm)	7.0" (17.5 cm)	7.0" (17.5 cm)
Fire Suppression Coverage*
Novice Operator Coverage	30 ft² (2.8 m²)	40 ft² (3.7 m²)	60 ft² (5.6 m²)	40 ft² (3.7 m²)	60 ft² (5.6 m²)	80 ft² (7.4 m²)	60 ft² (5.6 m²)	80 ft² (7.4 m²)	120 ft² (11.1 m²)
Experienced Operator Coverage	75 ft² (6.9 m²)	100 ft² (9.3 m²)	150 ft² (13.9 m²)	100 ft² (9.3 m²)	150 ft² (13.9 m²)	200 ft² (18.6 m²)	150 ft² (13.9 m²)	200 ft² (18.6 m²)	300 ft² (27.9 m²)

Working Mechanism

When the valve lever is pressed, the sealing interface is mechanically opened and nitrogen gas begins to expand inside the cylinder.

The process follows three controlled steps:

nitrogen pressure acts on powder bed and pushes solid particles into dip tube inlet
powder is transferred through internal channel and valve body under gas-driven flow
nozzle converts pressure energy into directional particle stream toward combustion zone

During discharge, the system maintains continuous powder flow for a controlled time window under 195–240 PSI pressure decay behavior, depending on temperature and valve resistance.

👉 The mechanism does not cool the fire; it interrupts combustion by physically covering and isolating oxygen contact surfaces.

20 LBS powder fire extinguisher(usa module

Material & Component System

Cylinder body

material: carbon steel sheet with welded or seamless forming (configuration dependent)

function: resist internal gas pressure and maintain structural integrity under cyclic load

pressure test: hydrostatic verification typically above 3× working pressure level

Powder agent

composition: ABC dry chemical powder (ammonium phosphate based)

particle function: forms insulating layer on burning surface and blocks oxygen diffusion channels

storage condition: sealed internal environment to reduce moisture-induced agglomeration

Valve system

details: brass alloy valve body with manual lever structure

sealing: interface uses elastomer O-ring to reduce nitrogen leakage under static storage pressure

dip tube: rigid polymer or metal tube conducts powder from bottom reservoir

Each component is designed to transfer pressure energy into solid particle motion without phase conversion.

Fire Application Conditions

The 20 LBS configuration is selected for medium fire load density zones where localized suppression is required within 10–12 m distance range.

Class A solid combustion zones

Materials: stacked wood pallets, cardboard cartons, textile storage

Condition: surface combustion with oxygen diffusion

Action: powder deposits on surface and interrupts oxidation reaction pathway

Class B liquid fuel zones

Materials: gasoline, diesel, industrial lubricants

Condition: vapor combustion above liquid surface

Action: powder disperses flame layer and reduces vapor ignition continuity

Class C electrical zones

Condition: energized equipment (low to medium voltage industrial systems)

Requirement: non-conductive discharge behavior under gas-powder system

Action: powder separates flame path without electrical conduction

Pressure System Behavior

The extinguisher operates under nitrogen-driven pressure range of 195–240 PSI, which varies with ambient temperature between -30°C to +60°C operating window.

Key pressure behaviors:

temperature drop: gas contraction reduces discharge range
temperature rise: internal pressure increases and accelerates powder flow
seal degradation: micro-leakage reduces stored energy capacity

The system uses hydrostatic validation and seal compression control to maintain pressure retention during storage and transport cycles.

Installation & Integration Method

The unit is installed as a mechanical fire response module in fixed positions:

wall bracket mounting using steel support frame
anchor bolts (M8 specification commonly used in industrial installation)
installation height typically aligned with manual access zone (0.8–1.2 m range)

Operational integration:

no electrical input required
no pipeline connection required
activation performed by manual lever displacement that opens valve sealing path

The system is designed to convert static storage pressure into immediate discharge response without auxiliary systems.

Failure Modes & Engineering Risk Control

Identified failure mechanisms:

valve seal fatigue ➔ nitrogen leakage reduces internal pressure below operational threshold
powder moisture absorption ➔ increases internal friction and blocks dip tube flow
nozzle restriction ➔ reduces particle velocity and effective discharge distance
cylinder corrosion ➔ localized wall thinning under long-term humidity exposure

Control methods applied in production:

controlled humidity filling environment during powder loading
torque-controlled valve assembly to maintain seal compression force
batch sampling discharge test to verify flow continuity and pressure retention

Manufacturing & Quality Traceability

Weimin production process separates structural, filling, and pressure stages:

cylinder forming and welding or seamless shaping
hydrostatic pressure test to validate structural integrity
internal surface treatment to reduce corrosion interaction
ABC powder filling under controlled moisture conditions
valve assembly with torque calibration
nitrogen pressurization to 195–240 PSI target range
final inspection including weight verification and batch traceability marking

Each unit is linked to a batch-level production record for export inspection tracking.

Procurement Interface

For configuration and quotation, buyers typically define:

installation scenario: warehouse / commercial building / industrial system
fire risk type: solid combustible / liquid fuel / electrical exposure
compliance requirement: US market installation standard
order quantity: project sample / container shipment level

Weimin responds with:

Pressure and cylinder configuration sheet • Export compliance documentation set • OEM label and marking structure • Production-based FOB quotation

Request for Quotation

👉 To configure a 20 LBS dry chemical fire extinguisher supply plan for US market projects, provide your installation scenario and compliance requirement.

Weimin will map cylinder pressure system, valve configuration, and powder specification into a production quotation package based on batch manufacturing capability.

Submit Your Inquiry to Weimin

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