Gas fire-extinguishing system is one of the four traditional fixed extinguishing systems (sprinkling, gas, foam, and dry powder types) and has been widely applied. Gas fire extinguishing system is featured with the following characteristics: good insulation to be able to suppress electrical fire; clear extinguishing agent, without any residue generated during and after fire extinguishing; fast in fire extinguishing. Since the extinguishing agent is kept in a properly pressurized container (steel cylinder), any problems detected in product design, purchase, manufacturing and examination due to the manufacturer may not only cause extinguishing agent leakage from the cylinder but bring threat to personal safety during the processes of production, transportation, loading and unloading, installation, debugging and use, etc., which shall cause significant property loss for the enterprise and bring bad effects to the society.

     For research and development of the gas extinguishing system product, the engineering technical personnel of Beijing Leader Haixin has been based on the product features and customer needs, not only taking the product safety, sealing performance, simple and easy installation, and the low rework rate and installation cost into account, but paying much attention to the pre-sales and after-sales service, which guarantees both personal and property security and makes sure of user satisfaction.

    Differences between Leader Haixin gas extinguishing systems and like products of other companies:

    1. Leader Haixin product is complete in specification, with attractive appearance, top grade and luxury sense. The cabinet HFC-227ea gas extinguishing device and automatic pressure relief device have applied for national patents.

     2. The safety valve for cylinder valve of the pressure container- steel cylinder adopts the safety diaphragm specially produced by Shanghai Huali Safety Valve Company. The valve would relieve pressure automatically when reaching the given pressure value, so as to ensure security. Other gas extinguishing system manufacturers mostly design and produce safety valve by themselves. (See figures 1 and 2)

 

 

 

  

3. A protective cap is designed for the cylinder valve outlet on each container of the gas extinguishing system, so that the product can ensure personal safety of the operator in case of false starting of the steel cylinder during production, transportation, loading and unloading, installation, debugging and other processes. (See figures 3 and 4)

 

 

  

Figure 3: Extinguishing agent container of Leader Haixin               Figure 4: Extinguishing agent container of other manufacturers

4. Valve of the extinguishing agent containing cylinder is made of forged hard-drawing brass rod, which protects it from corrosion and rust in case of long-time storage and provides flexible and reliable starting performance. It overcomes many problems and defects of the cylinder valve made of stainless iron cast at low cost, like the fine heat cracks, loosening and pore inside and on surface of the cylinder valve during casting cooling and such major defects as poor sealing performance. (See figures 5 and 6)

 

  

5、氣體滅火系統(tǒng)中臥式瓶頭閥密封口和各零部件連接處采用徑向和端面雙密封結(jié)構(gòu)。使密封性作用得到雙重保護(hù)，上述改進(jìn)*******。（見圖7）

5. Radial sealing and end-face sealing should be applied simultaneously on the horizontal cylinder valve sealing point and joints of all parts to guarantee dual protection of sealing performance, which improvements have filled in domestic blank. (See figure 7)

 

Figure 7: Cylinder valve with dual sealing structure

6. A pressure meter switch structure is designed for the cylinder valve of extinguishing agent container in the gas extinguishing system. The structure is usually closed and only opened for inspection; it’s simple to operate with more reliable sealing performance and the structure design is better than that of other gas extinguishing system manufacturers. (See figure 8)

 

 Figure 8: Cylinder valve with pressure meter switch

7. The pipeline for starting between the starting device and the extinguishing agent container is made of DN6 stainless steel hose which has replaced the low-cost DN 4-6mm copper pipe adopted by most domestic gas extinguishing system manufacturers. DN6 stainless steel hose has advantages as below: (a) no necessity to process and bend the copper pipe at the construction site in adverse environment, so as to reduce processing, reworking and installation cost; (b) installation is simple and quick, with efficiency being more than four times than others, shortening the installation period; (c) sealing performance of the starting pipeline is improved so that all extinguishing agent container can be started reliably. (See figures 9, 10, and 11)

 

 

 

8. The high-pressure connecting hose in the gas extinguishing system should be adjustable at X and Y axes (i.e. at horizontal and vertical directions) to ensure sealing performance. (See figures 12, 13)

   

 

9. The large multi-area gas extinguishing system with pipe network can start the extinguishing agent storage container safely and reliably.

In case number of the extinguishing agent container exceeds 80-400: The engineering technical personnel of Leader Haixin has succeeded in research and development of the self-pressure supplementation starting technology through trial and error and multiple practical engineering firefighting cases, solving the national and international problem that number of the extinguishing agent container exceeds 80-400 in large gas extinguishing system with pipe network. There have been now three items with patent, guaranteeing the company’s core competitiveness in this area from three aspects. This technology is featured with self pressure supplementation, rich gas source, high air pressure, reliable starting performance, satisfying appearance, consistent height, simple installation procedure, no increase of start-up cylinder volume, low cost, etc.

10. The various types of gas extinguishing system products with pipe network produced by Leader Haixin specially apply to purchase and installation for domestic and foreign projects. Since there’re no parts to be processed on site and comprehensive and detailed installation drawings and data have been provided, installation can be simple and quick, therefore, general personnel who has never performed installation can also complete the installation work. The product has been exported to many foreign countries like those in North Africa, etc.