![[Special Report] No PCB Coating? — Simple Sprinkler Defective Certification Controversy on Public Trial](https://storage.readdy-site.link/project_files/f9ed3217-4d54-4cc1-9fac-008e697b396a/b51c89f1-e555-44c7-a049-ea61ef633f73_KakaoTalk_20260506_093836089.jpg?v=52e06ce61c7c53ff70dc55fe619f0bdb)
Report on simple sprinkler tank wear-resistant coating (pump control PCB). Duksu Systems' official position and related verification results are available.
Read Full ArticleDuksu Systems has completed full PCB coating on Type A/B simple sprinklers.
In response to the defective certification controversy raised in the article, we officially confirm that our products are fully PCB coated.
Products without pump control PCB protective coating are vulnerable to moisture and corrosion.
Underground or seawater use environments pose leakage risks due to internal tank corrosion.
Products that do not meet type approval standards cause insurance and legal liability issues.
When the core PCB coating of a simple sprinkler is missing, normal operation during a fire cannot be guaranteed. This is not a simple defect but a serious safety issue threatening lives and property.
Duksu Systems has completed full PCB coating on Type A/B simple sprinkler packages to effectively address these issues.
Get a quick overview of Duksu Systems' fire safety solutions.
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An integrated simple sprinkler solution optimized for small facilities, automatically suppressing fires immediately upon detection.
3-Module Package for Small Facilities
Type A is a 3-module package optimized for small lodging facilities, facilities for the elderly and children, and small medical facilities. Its compact design allows easy installation even in tight spaces, meeting fire safety regulations at a reasonable cost.
An optimized automatic fire suppression system for energy storage systems (ESS, UPS, server racks). Instantly responds to fire and prevents secondary explosions and reignition.
Automatic Fire Suppression System for ESS·UPS·Server Rack
Lithium battery and electrical equipment fires carry extremely high risks of rapid temperature rise and reignition. Duksu System's ESS-linked quick sprinkler is a compact automatic suppression device optimized for tight equipment rooms, instantly discharging suppressant upon fire detection to quickly contain initial fires.
Thermal head ruptures at 68°C, initiating discharge within seconds.
Lithium fire agent enables safe suppression even on electrical equipment.
Compact system configuration installable in tight equipment rooms.
Mechanical operation ensures reliable suppression even during power outage.
Watch how lithium fire suppressant instantly extinguishes ESS·UPS·server rack fires and prevents re-ignition, plus a comparison with plain water.
After the sprinkler head bursts, lithium fire suppressant discharges to instantly extinguish lithium and electrical fires, followed by 5–10 minutes of continuous cooling. The test used high-capacity automotive lithium batteries (70W-class, 7 units) that had reached over 300°C thermal runaway; after suppression, they rapidly cooled to below 80°C in just 10 seconds. Only 2 units were lost while the remaining 5 stayed in normal condition.
Transparent yet powerful. Duksoo System's special coating solution with diamond-grade adhesion, eco-friendly ingredients, and a 5-year guarantee.
Duksoo System's special transparent coating provides powerful protection while maintaining the original appearance of the product. Diamond-grade adhesion ensures it stays intact in any environment.
5x stronger adhesion than standard coatings — resists peeling under impact, friction, or vibration.
Free from harmful chemicals, safe for workers and the environment. Meets environmental certification standards.
5-year quality guarantee after application. Free recoating provided for peeling, discoloration, or performance degradation.
Coating performance is reliably maintained in seawater, groundwater, acidic, and alkaline environments.
A portable extinguisher optimized for initial fire suppression, enabling anyone to quickly contain a fire.
The portable extinguisher is fire suppression equipment that anyone can use immediately without special training. Wall-mounted for quick access in emergencies, it effectively suppresses initial fires and prevents them from spreading into major fires.
An AI-integrated intelligent suppression system that automatically detects fires and releases suppressant at long range under high pressure.
Indoor
The Cannon integrates with AI fire detection to automatically set the optimal discharge angle and release agent the moment fire is detected. It delivers powerful suppression through long-range, high-pressure discharge at large warehouses, factories, and petrochemical plants.
A specialized extinguisher for lithium battery fires, effectively suppressing fires in EVs, ESS, and battery facilities.
4L Capacity Lithium Battery Fire Extinguisher
The 4L extinguisher is a portable unit suitable for EV charging stations, small ESS facilities, battery storage warehouses, and power tool charging stations. It effectively controls lithium battery fires that are difficult to suppress with standard extinguishers and can be quickly deployed in tight spaces.
Class A · B · Lithium battery fires each require a different agent. Duksu Systems supplies KFI-certified fire agents tailored to your site — even more powerful with AI Cannon integration.
General Fire
A water-based fire agent optimized for general combustible fires involving wood, paper, and textiles. Eco-friendly and harmless to humans, with minimal residue for easy post-fire recovery.
Duksu Systems goes beyond simple product sales — we directly analyze your site environment and design and supply the optimal fire agent. From Class A/B general fires to lithium battery special fires, we provide customized agent solutions for every site.
From cultural heritage to factories and parking lots — we provide optimized fire safety solutions for every site at risk.
Protecting irreplaceable cultural assets. AI cannon precision suppression and simple sprinklers suppress initial fires without damaging artifacts.
Duksu System's technology and innovation
Professional engineers offer free on-site consulting.
Download KFI type approval certificates for each product.
Check out Duksu System products installed in various field environments. See the performance and quality firsthand through actual installation photos.
Simple sprinkler package installed on the ceiling of a large logistics warehouse for automatic fire suppression.
Portable extinguisher wall-mounted in a mixed-use building corridor for rapid initial response.
AI-integrated cannon system installed on a large factory rooftop for immediate wide-area fire response.
Lithium battery extinguisher installed at an EV charging station for specialized lithium fire response.
Sprinkler water tank and pump system fully equipped in a lodging facility mechanical room for safety assurance.
Installed 6 months ago at a site using groundwater and seawater — while rust typically appears at welded joints within 1-2 months, the coated water tank shows zero change.
Want more installation cases and detailed information?
Product inquiries, quotes, installation consultations — our expert engineers respond promptly.
For urgent situations or emergency installations, contact us immediately.
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