The ANWETECH 20 MPa IG541 Inert Gas Fire Suppression System is a total flooding fire suppression solution using a mixture of nitrogen, argon and carbon dioxide.
The IG541 extinguishing agent is colourless, odourless, non-toxic and non-conductive. The system is designed for enclosed protected areas including computer rooms, telecommunication rooms, transformer rooms, electrical switch rooms, generator rooms, control centres, archives and other industrial spaces.
The system supports automatic electrical, manual electrical and mechanical emergency operation, with 80 L and 140 L extinguishing-agent cylinder o
The ANWETECH IG541 system is a high-pressure gaseous fire suppression system with a storage pressure of 20.0 MPa.
IG541 extinguishing agent consists of naturally occurring atmospheric gases:
The agent suppresses fire primarily by reducing the oxygen concentration inside the protected enclosure to a level that does not support combustion.
It is suitable for total flooding protection against Class A surface fires, Class B flammable-liquid fires and energized electrical hazards that can be safely protected inside enclosed spaces.
The system can be configured either as a combined distribution system, where one extinguishing system serves multiple protected zones, or as a unit independent system dedicated to one individual protected area.
The extinguishing-agent cylinders are designed for a storage pressure of 20.0 MPa, with a maximum working pressure of 23.2 MPa at +50°C.
IG541 is composed of nitrogen, argon and carbon dioxide and is described in the manual as:
The agent does not impair visibility or produce corrosive decomposition products during its intended extinguishing application.
The system supports:
Under automatic control, the system can initiate alarm and equipment linkage before extinguishing-agent discharge.
According to the manual, after a fire signal is received, the system can activate audible and visual alarms, initiate shutdown of associated equipment and start the release sequence after a preset delay.
Available extinguishing-agent cylinder volumes:
The system can be configured as:
This allows the extinguishing system arrangement to be selected according to the number and layout of protected areas.
| Model | Cylinder Volume | Working Pressure | Cylinder Diameter | Cylinder Height |
|---|---|---|---|---|
| HMP80/20 | 80 L | 20 MPa | Φ279 mm | 1720 ± 20 mm |
| HMP140/20 | 140 L | 20 MPa | Φ356 mm | 1825 ± 20 mm |
The respective filling weights stated in the manual at 200 bar are:
| Parameter | Specification |
|---|---|
| Product Type | IG541 Mixture Gas Fire Suppression System |
| Storage Pressure | 20.0 MPa |
| Working Temperature | 0°C to +50°C |
| Maximum Working Pressure at +50°C | 23.2 MPa |
| Minimum Working Pressure at 0°C | 18 MPa |
| Cylinder Volume | 80 L / 140 L |
| Filling Weight @ 200 bar | 23.9 kg / 42 kg |
| System Operating Voltage | 220 V AC / 24 V DC |
| Starting Mode | Electrical Automatic / Electrical Manual / Mechanical Emergency |
| Class A Fire Extinguishing Concentration | 28.1% |
| Class B Fire Extinguishing Concentration | 33.8% |
| Class A Design Concentration | 36.5% |
| Class B Design Concentration | 43.9% |
| Design Concentration for Occupied Area | 37.5%–43% |
| Executive Standard | GB25972-2010 |
| Component | Concentration | Purity |
|---|---|---|
| Nitrogen (N₂) | 52% ± 4% | >99.9% |
| Argon (Ar) | 40% ± 4% | >99.9% |
| Carbon Dioxide (CO₂) | 8% +1% / -0.0% | >99.5% |
When a fire is detected, the fire protection control system can initiate the alarm, equipment linkage, time delay and cylinder release sequence.
The extinguishing agent is released from the storage cylinders through the manifold and distribution pipework to the discharge nozzles installed within the protected area.
When the extinguishing controller is set to automatic mode, a fire signal can initiate:
Fire Detection → Audible & Visual Alarm → Equipment Linkage → Delay → Valve / Cylinder Release → IG541 Discharge
The source manual specifies a preset 30-second delay in the described automatic control sequence.
The alarm and linkage functions operate automatically, while extinguishing-agent release requires authorized personnel to operate the manual release control.
A mechanical emergency operation method is provided for use by trained personnel if the electrical control system cannot initiate discharge.
Depending on system configuration and project design, the IG541 system may include:
The actual component configuration depends on the protected area and system design.
The system uses discharge nozzles selected according to the protected-area design.
The manual lists the standard DPT32 nozzle with:
| Parameter | Value |
|---|---|
| Model | DPT32 |
| Size | 60 × 55 mm |
| Connection | RC1 1/4 in. |
| Height | 50 mm |
| Discharge Pattern | 360° |
The manual also states:
The IG541 fire suppression system is suitable for enclosed protected areas including:
One IG541 extinguishing system can serve several protected areas through the use of distribution and selective valves.
Only one protected zone is discharged at a time.
One dedicated IG541 system protects one individual protected area.
This arrangement is generally used where independent protection is required.
The system should be installed, commissioned and maintained by trained personnel familiar with high-pressure gaseous fire suppression systems.
The manual requires routine inspection to include checks of:
Routine inspection is specified as weekly, while periodic maintenance is specified as at least once per year.
Storage and driving cylinders are also specified for inspection every 5 years according to the applicable seamless-steel-cylinder standard.
