Low-pressure carbon dioxide equipment

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

2. Features of Low-Pressure Carbon Dioxide Fire Extinguishing System: 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 suppression systems, the low-pressure CO2 fire suppression system boasts advantages such as lower pressure, larger storage capacity, higher fire extinguishing efficiency, and smaller land area, thanks to its use of low-temperature tank storage.

4. The low-pressure carbon dioxide fire suppression system offers superior overall cost-effectiveness, particularly for larger fire protection projects. It can save approximately 30% of the investment compared to high-pressure carbon dioxide systems, with the savings becoming more pronounced as the scale of the project increases.

5. The low-pressure carbon dioxide fire suppression system not only automatically discharges extinguishing agent at pre-set times but also allows for manual on/off control at any time to regulate the discharge. It not only saves on the amount of extinguishing agent used but is also suitable for areas prone to frequent fires.

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

7. Detachable evaporator for low-pressure carbon dioxide fire extinguishing systems, featuring ease of maintenance and replacement (patented nationally).

8. Serpentine tube evaporator for low-pressure CO2 fire suppression systems, featuring excellent heat exchange performance and energy-saving. The system's selection valve is a patented product independently developed by our company, with reliable performance and easy operation.

9. Carbon dioxide fire extinguishers are suitable for extinguishing general solid fires (i.e., Class A fires), gas fires (Class C fires), and Class B fires involving flammable liquids (Category I, II, and III).

10. Carbon dioxide fire 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-supplying chemical substances fires that can be extinguished by CO2 fire suppression systems, such as nitrocellulose.

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

14. Fire involving chemicals that can decompose in a carbon dioxide fire suppression system.

15. Smoldering fires within the fiber of a carbon dioxide extinguishing system.

16. Low-pressure CO2 fire suppression systems are characterized into two types:管网自动灭火系统管网自动灭火系统, which further divides 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 one fire extinguishing storage device. It consists of fire detectors, alarm controllers, extinguishing agent storage devices, piping systems, and nozzles.

19. The Low-Pressure Carbon Dioxide Combination Distribution System is a storage unit for fire extinguishing systems serving multiple protected areas. The extinguishing agent is stored based on the gas consumption of the larger protected area. The combination distribution system consists of a fire detection and alarm system, a fire extinguishing control system, and the storage unit.

20. The low-pressure CO2 fire extinguishing system sprays a large amount of CO2 gas around the burning material or distributed within the sealed space being protected. This reduces the oxygen content around the burning material or in the air, bringing it below the ignition point, thus extinguishing the fire by "asphyxiation." Additionally, it also has a certain cooling effect.

21. The storage tank of the low-pressure CO2 fire extinguishing system maintains the normal storage temperature of the CO2 extinguishing agent between -20℃ and -18℃, corresponding to a pressure of 1.9MPa to 2.1MPa.

22. When the storage tank pressure of the low-pressure CO2 fire extinguishing system reaches 2.1 MPa, the controller issues a command to start the refrigeration unit, and the refrigerant begins to operate.

23. The low-pressure carbon dioxide fire suppression system stops operating when the storage tank pressure drops to 1.9 MPa.

24. The low-pressure CO2 fire extinguishing system will trigger an audible and visual alarm when the tank pressure reaches 2.2 MPa or 1.8 MPa. The controller will also emit an audible and visual alarm signal when the tank's liquid level is at the upper or lower limit.

25. When the liquid level of the low-pressure CO2 fire extinguishing system falls below the lower limit, the extinguishing agent should be replenished promptly. Upon the pressure rising 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 is in an automatic control state.

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

28. Upon reaching the fire control time (usually 60 seconds), the main control valve automatically closes, and the selector valve must be manually closed. The system then returns to the standby state for fire extinguishing.

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 zone start button to open the solenoid valve and release the starting gas. This then opens the main control valve and the corresponding selector valve, releasing the fire extinguishing agent to extinguish 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 interlocked equipment should be shut down, 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 a low-pressure CO2 fire suppression system, if the fire alarm sounds and no anomalies are detected within the delay period, the fire suppression system does not need to be activated. You can simply press the manual emergency start/stop button to prevent the fire suppression controller from issuing extinguishing commands. 33. In a low-pressure CO2 fire suppression system, even if the delay has ended and an anomaly is detected after the system has been activated, you can still press the manual emergency stop button or manually close the main control valve on the storage tank to immediately stop the release of the extinguishing agent.

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 on-duty personnel for instruments, compressors, and other equipment.

34. The storage units for low-pressure CO2 fire extinguishing systems should be installed inside the storage room, which should be located in a room that is easily accessible by personnel, convenient for entry and exit, and not prone to fire.

35. The storage room for low-pressure CO2 fire extinguishing system must be in a well-ventilated area. Otherwise, additional ventilation and air exchange facilities should be installed, and the storage equipment should be shielded from direct sunlight radiation.

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

37. During hoisting and installation, construction personnel are strictly prohibited from tampering with any components on the storage device of the low-pressure CO2 fire suppression system, including instruments, meters, refrigeration equipment, gas control circuits, valves, etc.

38. The manufacturer has conducted air-tightness and strength tests on all the connections of the complete equipment. Due to the difficulties in road transportation, the pressure gauge, safety valve, and compressor may be disassembled. The installation of these equipment upon arrival will be handled by the manufacturer's after-sales personnel.

39. The entire storage unit, gas pipeline, instrument wiring, etc., for the low-pressure CO2 fire suppression system are fully in place on the tank. Upon completion of the low-pressure CO2 pipeline installation, the factory's after-sales personnel will provide technical guidance and assistance in installing the selector pipeline, instrument wiring, and the connection between the fire control unit and the storage unit.

40. The filling process for low-pressure carbon dioxide fire suppression systems may only commence after the aforementioned work is fully completed. Storage room entrances and exits must be kept clear of any obstructions to ensure unimpeded operation and maintenance.