Product Overview of the IG541 Gas Fire Suppression System 

1.1 System Overview

IG541 The automatic fire suppression system comprises a cylinder rack, fire‑extinguishing agent storage cylinders, container valves, piping network connectors, check valves, manifolds, safety relief devices, selection valves, signal feedback units, extinguishing agent delivery pipelines, pressure‑reducing devices, nozzles, pilot cylinders, actuators, initiating pipelines, gas check valves, and other components, making it an intelligent automated fire suppression system. Depending on the specific application requirements, it can be configured as either a unit‑independent system or a combined distribution system, employing a total flooding extinguishing method to provide fire protection for both single and multiple protected zones. The system features advanced technology, high extinguishing efficiency, and convenient maintenance. It offers three activation modes: automatic, manual, and mechanical emergency operation.

1.2 Application Areas

This system is primarily applicable to the following types of fires:

1. Solid surface fires;
2. Liquid fires;
3. Gas fires in which the gas supply can be shut off before extinguishing;
4. Electrical fire;

Typical citation locations:

Mainly applicable to Fire protection for computer rooms, telecommunications equipment rooms, control rooms, rooms housing valuable equipment, repositories for cultural relics and archival materials, libraries and archives, data storage facilities, generator rooms, oil-immersed transformer rooms, substations, electrical circuit breakers, circulating‑water systems, hydraulic equipment, drying equipment, dust‑removal systems, paint‑spraying production lines, and other such premises or equipment.

1.3 Fire-extinguishing agent

IG541 It is a type of by N ₂、 Ar 、 CO ₂ A mixed gas composed of three gases (with a volumetric ratio of: N ₂52%， At 40% ， CO ₂8% ), is a clean‑gas fire suppression system and currently the safest and most environmentally friendly gaseous fire suppression system available.

1.4 Safety Warning

1 ) IG-541 It is intended for use in occupied areas and requires a system delay during discharge to ensure that personnel evacuate within the delay period.

2 ) User units shall install conspicuous warning signs at the following locations; recommended wording for the signs is as follows:

    a ) Warning sign within the protected area: Warning! Upon hearing the on-site alarm, personnel must evacuate immediately.

    b ) At the emergency start button: Warning! When initiating a mechanical emergency start, ensure that no one is present within the protected area.

3 ) In addition to the aforementioned warnings, other safety measures shall comply with the relevant current national regulations.

2. Fire Suppression System Control Program

3. Fire Suppression System Schematic Diagram

3.1 Unit-Independent System

A unitary independent system refers to a fire suppression system that employs a single extinguishing agent storage unit to protect a single protected area, and is used in facilities with special requirements or in standalone protected zones.

When a fire occurs in the protected area, the fire alarm and extinguishing control panel sends a command to open the initiating cylinder, releasing the initiating gas. The initiating gas travels through the initiating pipeline, opening the container valve of the extinguishing agent storage cylinder and releasing the extinguishing agent. The extinguishing agent is then discharged into the protected area via the piping network—comprising connecting pipes, flow‑direction check valves, a manifold, extinguishing agent delivery lines, and nozzles—to achieve fire suppression.

The architecture of the unit‑independent system is shown in the figure:

1. Fire-extinguishing agent storage cylinder rack 2. Initiating cylinder 3. Initiating cylinder pressure gauge 4. Nitrogen‑driven gas container valve

5. Electromagnetic actuator shear pin 6. Starter bottle electromagnetic actuator 7. Mechanical emergency‑start shear pin

8. Mechanical Emergency Start Button 9. Low-泄 High-Seal Valve 10. Pressure-Reducing Device 11. Fire Extinguishing Agent Delivery Pipeline

12. Low‑leakage, high‑seal valve 13. Signal feedback device 14. Safety relief device 15. Nozzle

16. Collection manifold 17. Liquid‑flow check valve 18. Piping network connection pipe 19. Fire‑extinguishing agent storage cylinder pressure gauge

20. Mechanical Emergency Start Handle 21. Pneumatic Valve 22. IG541 Cylinder Valve 23. Starting Piping

24. Fire-extinguishing agent storage cylinder 25. Fixing components (clamps, pull rods)

3.2 Combined Distribution System

A combined distribution system refers to a fire‑extinguishing agent storage unit that, through a network of piping and selective distribution, protects two or more protected zones. With the exception of its combined distribution control—achieved by integrating gas check valves and selection valves—the remaining components are identical to those of a unit‑independent system.

The combined distribution system is suitable for protecting two or more protected zones. Its key feature is that each zone is equipped with its own initiating cylinder and selection valve, while the extinguishing agent storage cylinders are shared—calculated based on the largest protected zone. This multi-zone combined protection approach helps reduce initial capital investment.

When a fire occurs in any protected zone, the fire alarm and suppression control panel issues a command to open the initiating cylinder associated with that zone, releasing initiating gas. The initiating gas travels through the initiating pipeline to open the selection valve for the zone and the corresponding extinguishing-agent storage‑cylinder valve. The extinguishing agent then flows via a high‑pressure hose, a check valve, a manifold, the opened selection valve, and the extinguishing-agent delivery piping to be discharged into the protected zone. The initiating gas opens only the selection valve of the designated zone, ensuring that the extinguishing agent does not enter other zones, while the gas check valve restricts the flow of initiating gas to the corresponding extinguishing-agent storage‑cylinder valves.

The structure of the combined distribution system is shown in the figure:

1. Starter Bottle Rack Assembly 2. Starter Bottle 3. Starter Bottle Mounting Component 4. Starter Bottle Pressure Gauge

5. Nitrogen‑driven gas container valve 6. Low‑leakage, high‑seal valve 7. Safety pin for the electromagnetic actuator 8. Electromagnetic actuator for the initiating cylinder

9. Mechanical emergency‑start safety pin 10. Mechanical emergency‑start button 11. Cylinder‑holding assembly (clamps, pull rods) 12. Selecting valve 13. Fire‑extinguishing delivery piping 14. Signal feedback device 5. Pressure‑reducing device 16. Safety relief device 17. Low‑leakage, high‑seal valve 18. Nozzle 19. Manifold 20. Liquid‑flow check valve 21. Piping network connection pipe 22. Starting pipeline 23. Fire‑extinguishing agent cylinder pressure gauge 24. Mechanical emergency‑start handle 25. Pneumatic valve 26. IG541 container valve 27. Fire‑extinguishing agent cylinder 28. Fire‑extinguishing agent cylinder rack

4. Startup Method

This system offers three startup modes: automatic startup, manual startup, and mechanical emergency‑operation startup.

4.1 Automatic Startup Mode

Gas fire‑extinguishing alarm and control systems are typically equipped with two distinct types of fire detectors. The control panel features an “Automatic”/“Manual” selector switch (which may also be mounted separately outside the protected area). When set to the “Automatic” position, the fire‑extinguishing system operates in automatic mode.

When only one detector sends a fire signal, the control panel activates the alarm bell or the audible‑visual alarm to alert personnel of a fire, but it does not initiate the fire suppression system.

When both detectors issue fire signals, the control panel activates the alarm bells and the audible‑visual alarms, interlocks to close all openings in the protected zone, and initiates the fire‑extinguishing start‑up delay. Once the preset delay period elapses, the fire‑extinguishing system automatically starts.

If, during the spray‑delay period, it is determined that activation of the fire‑extinguishing system is not required, press the “Emergency Stop” button located outside the protected zone or on the controller to terminate the extinguishing command.

4.2 Manual Start Mode

When the transfer switch is set to the “Manual” position, the fire suppression system operates in manual mode.

In this mode, the detector sends a fire signal, prompting the control panel to activate the alarm bells and visual‑auditory alarms to alert personnel of the fire, but without initiating the fire suppression system. At this point, pressing the “Manual Start” or “Emergency Start” button on the external control panel or on the controller will trigger the fire suppression system.

Note: Regardless of whether the controller is in automatic or manual mode, pressing the “Emergency Start” and “Manual Start” buttons will activate the fire suppression system.

4.3 Mechanical Emergency Operation Initiation Method

When both automatic and manual activation fail, perform the mechanical emergency operation according to the following steps: 1) Manually shut down the linked equipment and disconnect the power supply; 2) Remove the “mechanical emergency start safety pin” from the electromagnetic actuator of the initiating cylinder in the corresponding protected zone, then press the mechanical emergency start button. The electromagnetic actuator will open the initiating cylinder, releasing the initiating gas to activate the fire suppression system.

5. Main Technical Parameters

With a pipe network IG541 The main technical parameters of the fire suppression system are shown in the table below.

IG541 Gas Fire Suppression System – Frequently Asked Questions

Q: What types of facilities are suitable for the IG‑541 gas fire suppression system?

A: Suitable for computer rooms, archives, libraries, switchgear rooms, and rooms housing valuable equipment; it can extinguish Class A, B, and C fires, as well as energized electrical fires.

Q: What is IG541 fire suppressant composed of?  

A: IG541 is a blended inert gas composed of nitrogen, argon, and carbon dioxide in specific proportions, and it is a purely natural, clean-agent fire suppressant.

Q: What are the activation methods for the IG541 system?

A: Supports three activation modes—automatic, manual, and mechanical emergency—and can be integrated with a fire alarm system, triggering spray discharge via interlock with smoke and heat detectors.

Q: What is the fire-extinguishing mechanism of IG541?  

A: By releasing an inert gas to reduce the oxygen concentration within the protected area, the combustion reaction is suppressed, achieving fire suppression without any chemical reaction and leaving no residue after extinguishing.

Q: What are the key considerations for system installation and construction?  

A: The cylinder bank is housed in a dedicated cylinder room, with piping and nozzles installed in accordance with relevant standards. Pressure relief vents must be provided in the protected area, and a leak‑tightness test of the piping system shall be performed.

Q: What items should be checked during routine inspections and maintenance?

A: Regularly inspect the cylinder pressure gauge, cylinder valve, and pipeline fittings for leaks; test the alarm‑interlock devices; and check the cylinder body for rust or deformation.

Q: What is the impact of IG‑541 discharge on personnel within the protected area?

A: Prior to discharge, an audible and visual alarm will activate, and personnel must evacuate promptly. During the discharge, oxygen levels may drop; entry is strictly prohibited, and access to the protected area is permitted only after thorough ventilation.

Q: Will IG541 damage precision electronic equipment?

A: It is a clean, inert gas that is non-corrosive and leaves no particulate residue, making it highly compatible with precision instruments, magnetic disks, and optical equipment.

Q: Can the agent be refilled on-site after it has been discharged?

A: On-site refilling is not permitted. After discharge, the cylinders must be returned to a qualified fire‑safety organization for inspection and subsequent recharging with a mixed inert gas.

Q: Does the IG541 system meet the acceptance requirements for fire protection projects?

A: The product is accompanied by a fire‑safety inspection report and complies with relevant gas‑extinguishing standards. Upon completion of installation and commissioning, it can be integrated with the protected area to facilitate overall fire‑safety acceptance.