Low-pressure CO2 fire extinguishing equipment

1. Carbon dioxide fire suppression systems are categorized into: High-pressure Carbon Dioxide Fire Suppression Systems and Low-pressure Carbon Dioxide Fire Suppression Systems.

2. Features of Low-Pressure Carbon Dioxide Fire Extinguishing Systems: The low-pressure carbon dioxide automatic fire extinguishing system is developed based on the principles of the high-pressure carbon dioxide automatic fire extinguishing system and possesses unique advantages.

3. Compared to high-pressure CO2 automatic fire extinguishing systems, the low-pressure CO2 fire extinguishing system boasts advantages such as lower pressure, larger storage capacity, higher extinguishing efficiency, and smaller land area due to the use of low-temperature cylinder storage.

4. Low-pressure CO2 fire suppression systems offer superior overall cost-effectiveness, particularly for larger fire protection projects. They can save up to 30% in investment compared to high-pressure CO2 systems, with greater savings as the scale of the project increases.

5. The low-pressure carbon dioxide fire extinguishing system not only automatically discharges extinguishing agent at pre-set times but also allows for manual activation or shutdown to control the discharge. This not only saves on the amount of agent used but is also suitable for locations prone to frequent fires.

6. The refrigeration system of the low-pressure carbon dioxide storage unit offers two types of evaporators for user selection:

7. Detachable evaporator for low-pressure carbon dioxide fire suppression systems, featuring easy maintenance and replacement (patent obtained).

8. Serpentine tube evaporator for low-pressure carbon dioxide fire extinguishing system, featuring excellent heat exchange performance and energy-saving. The selector valve used in the system is a patent product independently developed by our company, known for its reliable performance and easy operation.

9. Carbon dioxide fire extinguishers are suitable for extinguishing Class A (solid) fires, Class C (gas) fires, and Class B (flammable liquids) fires, including Class A, B, and C liquids.

10. CO2 extinguishing does not contaminate the fire environment, leaves no residue after extinguishing, does not corrode equipment, and is non-conductive, making it suitable for extinguishing fires in electrically charged equipment and electrical circuits.

11. CO2 fire suppression system protection zones include storage rooms with valuable items or precious documents.

12. Oxygen-generating chemical fires in CO2 extinguishing systems, such as nitrocellulose, etc.

13. Carbon dioxide fire suppression systems for fires involving reactive metals and their hydrides.

14. Fire involving chemicals that can decompose into carbon dioxide灭火系统。

15. Smoldering fires within the fiber of the CO2 fire suppression system.

16. Low-pressure CO2 fire extinguishing systems are characterized into two types:管网自动灭火系统管网自动灭火系统 is further divided into independent unit systems and combined distribution systems.

17. The low-pressure CO2 automatic fire extinguishing system without a network is composed of three main parts: fire detectors, alarm controllers, and fire extinguishing devices.

18. A low-pressure carbon dioxide unit independent fire extinguishing system refers to a fire extinguishing system that protects a protected area using a single fire extinguishing storage device. It consists of fire detectors, alarm controllers, extinguishing agent storage devices, piping systems, and nozzles.

19. The low-pressure CO2 integrated distribution system is a storage unit for a fire suppression system used in multiple protected areas, with the extinguishing agent stored according to the gas consumption of the larger protected area. The integrated distribution system consists of a fire detection and alarm system, a fire suppression control system, and the storage unit.

20. Low-pressure carbon dioxide fire extinguishing systems discharge a large amount of carbon dioxide gas around the burning material or into the protected sealed space, reducing the oxygen content in the area around the burning material or the air, to a level below the ignition point. This "suffocation" effect on the fire is complemented by a cooling function.

21. The storage tank of the low-pressure carbon dioxide fire extinguishing system maintains the normal storage temperature of the carbon dioxide fire extinguishing agent between -20℃ and -18℃, corresponding to a pressure of 1.9MPa to 2.1MPa.

22. The low-pressure CO2 fire suppression system initiates the refrigeration unit upon the storage tank's pressure reaching 2.1 MPa, where the refrigerant begins to operate.

23. The low-pressure CO2 fire suppression system ceases operation when the storage tank pressure drops to 1.9 MPa.

24. The low-pressure CO2 fire extinguishing system sounds an audible and visual alarm when the storage tank pressure reaches 2.2 MPa or 1.8 MPa. Additionally, the controller will trigger an audible and visual alarm signal if the liquid level in the storage tank is at its upper or lower limits.

25. When the liquid level of the low-pressure CO2 fire suppression system falls below the lower limit, it should be promptly refilled with fire extinguishing agent. When the pressure rises to 2.38±0.12, the safety valve automatically opens to ensure the safety of the storage tank.

26. When the control mode of the low-pressure CO2 fire extinguishing system is set to "Automatic," the fire extinguishing system operates in an automatic control state.

27. In the event of a fire in the protected area, upon receiving the fire extinguishing signal from the automatic fire extinguishing alarm controller, the fire extinguishing controller sends an electrical signal to open the solenoid valve, releasing the starting gas, thereby opening the main control valve and the corresponding selector valve to discharge the extinguishing agent for fire suppression.

28. After reaching the fire control time (typically 60 seconds), the main control valve will automatically close, and the selector valve must be manually closed, restoring the system to the standby for extinguishing state.

29. In the low-pressure CO2 fire suppression system, the system is in manual control mode when the automatic control fails or the control method on the fire suppression controller is switched to "Manual."

30. In the event of a fire in the protected area, the low-pressure CO2 fire suppression system can be activated by pressing the corresponding area's start button to open the solenoid valve and release the starting gas, subsequently opening the main control valve and the corresponding selector valve to release the fire extinguishing agent for extinguishing the fire.

31. In the event of a fire in the protected area of a low-pressure CO2 fire suppression system when the fire control unit is unable to issue a fierce fire command, the interlock equipment should be shut off, and the corresponding selector valve and main control valve should be manually opened to release the fire extinguishing agent for extinguishing the fire.

32. In areas protected by a low-pressure CO2 fire suppression system, if a fire alarm is triggered and no abnormalities are detected within the delay time, the fire suppression system does not need to be activated. The manual emergency stop/start button can be pressed to prevent the fire suppression controller from issuing a suppression command. 33. In areas protected by a low-pressure CO2 fire suppression system, even if the delay has ended and an abnormal situation is detected after the system has been activated, the manual emergency stop button can still be pressed, or the main control valve on the storage tank can be manually closed to immediately stop the release of the fire suppressant.

Low-pressure CO2 fire suppression system storage units and accessories should be installed indoors or outdoors with rain and sun protection (controllers must be indoors), with the room size sufficient to accommodate the daily observation needs of staff of instruments, compressors, and other equipment.

34. The storage units for low-pressure CO2 fire extinguishing systems should be installed within the storage room, and this room should be located in an area easily accessible to personnel, with convenient entry and exit, and in a location that is less prone to fire.

35. The storage room for low-pressure carbon dioxide fire extinguishing system must be in a well-ventilated area. If not, additional ventilation and air exchange facilities should be installed, and direct sunlight radiation on the storage equipment should be avoided.

36. During the installation process of the low-pressure CO2 fire suppression system storage unit, collisions should be avoided; otherwise, the factory will not assume responsibility.

37. During the hoisting and installation process, construction personnel are strictly prohibited from tampering with any components on the storage device, such as instruments, gauges, refrigeration equipment, gas control circuits, valves, etc.

38. The manufacturer has conducted air tightness and strength tests on all components of the low-pressure CO2 fire suppression system during installation. Due to difficulties in road transportation, the pressure gauge, safety valve, and compressor may be removed. After arrival, the installation of these equipment will be handled by the manufacturer's after-sales personnel.

39. The entire storage unit, gas pipeline, and instrument wiring of the low-pressure CO2 fire extinguishing system are fully in place on the tank. After the installation of the entire low-pressure CO2 network is completed, the manufacturer's after-sales staff will provide technical guidance and assist with the installation of the selector pipeline, instrument wiring, and the connection between the fire control unit and the storage unit.

40. After the above work is thoroughly completed, the filling process for low-pressure carbon dioxide can proceed. The access and exit of the storage room for cylinders must not be obstructed with any debris to ensure unimpeded operation and maintenance.