Nitrogen Fire Suppression System
Engineered for oil-immersed transformers and reactors, our fixed Nitrogen Fire Suppression System delivers reliable protection based on the 'drain and inject' principle. When activated, it rapidly releases liquid nitrogen, which expands to cool the oil and displace oxygen. This dual-action not only extinguishes the flame but also prevents explosions by relieving internal pressure. It's a complete solution for transformer fire safety: explosion prevention and fire suppression in one integrated system.
Description
Details page content
I. product introduction
This device is designed to automatically detect transformer fires and can be activated automatically, manually, or remotely. Upon activation, it controls the oil drain valve to open, enabling rapid oil discharge and pressure relief. Simultaneously, the oil-flow cutoff valve effectively isolates the oil flow between the conservator tank and the main tank, preventing any additional oil from feeding the fire. The system then triggers the nitrogen release valve to inject nitrogen into the transformer, providing both fire prevention and suppression capabilities.
The oil-flow cutoff valve plays a critical role: during emergency oil drainage, it automatically cuts off the oil path from the conservator to the main tank, effectively preventing "adding fuel to the fire." This system is suitable for fire protection in new, expanded, or renovated power plants and substations, specifically for oil-immersed power transformers and reactors.
II. Model Explanation
III. Product Details/Advantages
1. Space-Saving Integration：Integrates control cabinet, fire cabinet, cutoff valve, detectors, and piping into one compact unit to save space.
2. Standardized Design：Compact and standardized structure enables easy design and seamless integration.
3. No Freezing Risk：No fire water supply needed, eliminating concerns over pipeline freezing in winter.
4. Simple Operation：Simplified control and piping systems make operation and maintenance easy.
5. Low Maintenance：Only routine nitrogen pressure and seal checks required, minimizing operational costs.
IV. Product Parameters
|
NO. |
Parameter Name |
Unit |
Parameter Value |
||
|
1 |
ambient temperature |
Fireproof cabinet |
℃ |
-20℃~60℃ |
|
|
℃ |
-40℃~ +60℃ |
||||
|
control cabinet |
℃ |
0℃~+50℃ |
|||
|
ambient humidity |
% |
≤85%(40℃) |
|||
|
2 |
power supply |
control cabinet |
V |
DC 220V/110V (customizable) |
|
|
Heating and lighting of fire cabinets |
V |
AC 220V (customizable) |
|||
|
3 |
nitrogen cylinder bank |
Storage pressure |
MPa |
13.5~15 |
|
|
Safe pressure relief |
MPa |
19 |
|||
|
Outlet pressure of pressure reducing device |
MPa |
0.5~0.8 (preset value 0.6) |
|||
|
traffic |
L/(S·㎡) |
0.8 |
|||
|
Valve outlet flow rate |
m³/h |
12 |
|||
|
4 |
Cut-off valve |
traffic |
L/Min |
50-100 |
|
|
5 |
fire detector |
Operating Temperature |
Fusible alloy type |
℃ |
130℃±10℃ |
|
Glass ball type |
℃ |
93℃±4℃ |
|||
|
6 |
metal hose |
work pressure |
MPa |
15 |
|
|
7 |
Nitrogen injection pipeline |
mm |
DN25 |
||
|
8 |
Oil discharge pipeline |
mm |
DN125 |
||
V. Scope of Supply
|
No. |
Name |
Model |
Quantity |
Unit |
|
1 |
control cabinet |
800x600x2260 |
1 |
set |
|
2 |
fire cabinet |
1000x600x1900 |
1 |
set |
|
3 |
Weighted shut-off valve |
DF-80 (with rain cover) |
1 |
PC(S) |
|
4 |
fire detector |
HT-1, Install bracket |
8 |
PC(S) |
|
5 |
Pipeline and installation accessories |
DN125 and DN25 |
1 |
set |
|
7 |
Install the attachment |
1 |
set |
VI. Optional Customization Solutions
We offer comprehensive customization services, precisely matching everything from the installation environment to basic parameters to ensure seamless integration of equipment with site conditions and efficient, reliable operation.
- Installation Environment Customization: We can adapt the design to the specific site conditions, including site dimensions, spatial layout, and ambient temperature (e.g., low or high temperature conditions), ensuring smooth equipment installation and compatibility.
- Basic Parameter Customization: We can flexibly adjust key indicators such as design oil discharge volume (maximum/rated/minimum), oil discharge pressure, inlet and outlet pipe diameters, and DC specifications of the control cabinet to meet diverse operational needs.
VII. Quality
The Nitrogen Fire Suppression System has passed the national inspection for fixed fire extinguishing systems and obtained the corresponding type test report, along with a fire protection product certification issued by the Fire Product Conformity Assessment Center of the Ministry of Emergency Management. It also holds a ten-item EMC test report issued by a CNAS/CMA-accredited third-party testing institution in the power industry. Furthermore, the system has a supply record with both State Grid and Southern Power Grid, and is UL certified.
Qualification association: We adhere strictly to globally recognized regulations and protocols, integrating environmental excellence and quality management throughout the product lifecycle.
VIII. Real-world cooperation cases
The 1.55 million tons/year calcium carbide plant project of Adani Green PVC in India is equipped with a nitrogen injection fire extinguishing system for the electric furnace transformer. Located in India, we specifically developed system programs and procured specialized components based on the local power supply conditions, the client's unique control requirements, telemetry signal specifications, and component requirements. This approach fully met the client's demands.
IX. Application Scenarios
1. Water-Scarce Areas: Delivers efficient fire protection with no water supply needed-ideal for wind farms and substations.
2. Extreme Cold Climates: Ensures reliable operation in snow and low temperatures, preventing ice blockage and valve sticking.
3. High Environmental Standards: Uses pure nitrogen with no chemical pollution to meet global environmental reviews.
4. Seismic Zones: Anti-vibration design prevents false activation and ensures reliability in high-seismic regions.
5. Urban/Indoor Substations: Compact installation with rapid oil drainage for explosion prevention in densely populated areas.
6. Retrofitting Projects: Easily installed online using existing interfaces-no shutdown or hot work required.
X. Our Service
Our after-sales service and technical team solemnly promises
Pre-Sales Service
- Consultation & Guidance: 24/7 online support with expert engineers to clarify needs, recommend solutions, and advise on pricing and processes.
- On-Site Inspection: Engineers visit sites for precise measurements and environmental assessment, deliver detailed reports to support tailored system design.
After-Sales Service
- Year Warranty: Covers material/manufacturing defects as per contract.
- Dedicated Support: One-on-one follow-up from a specialized team for seamless assistance.
- Multi-Channel Help: Support via contacts, project teams, or website; fast global coordination for repairs or replacements during warranty.
XI. Product usage tutorials, solutions, and technical problem notifications
To ensure the correct installation and operation of the Nitrogen Fire Suppression System, please follow the 5 core steps below. For detailed instructions, including safety precautions and technical diagrams, please refer to the full product manual.
5 Core Steps for System Setup:
- System Routine Maintenance
- Component Inspection
- Nitrogen Replenishment
- Nitrogen Filling Method
- Recovery After Activation
[Click here to view the complete product manual & detailed instructions ]
XII. Packaging and Transportation
XIII. Factory Strength
1. Qualification Certificates
2. Innovative technologies/capabilities
(1) High-tech enterprise certificate
3. Supply Chain Advantages
- Supplier Stability: Strategic partnerships with core suppliers ensure consistent raw material quality and reliable supply.
- Production Stability: Multiple production bases and flexible lines provide resilience against single-point failures.
- Logistics Reliability: Established logistics partners and backup routes guarantee timely and secure delivery.
4. Professional production equipment (CNC)
XIV. FAQ
1.Q: Do oil-immersed transformers require reserved interfaces for the Oil Drainage and Nitrogen Injection Fire Suppression System?
A: Yes. The transformer must have one oil drainage port, four nitrogen injection ports, one shut-off valve position, and eight fire detector nuts. Specific locations and dimensions should be confirmed in advance with our technical team.
2.Q: How is the fire cabinet location determined?
A: Based on site space, transformer layout, and oil outlet position-typically 3–8 meters from the transformer oil outlet for optimal connection and operation.
3.Q: Where does the discharged oil go after system activation?
A: Oil is directed to the accident oil pit via pre-embedded guide pipes, which must be laid before installation to ensure smooth drainage.
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