Quality
ISO-Certified
Certified Door Closers and Electromagnetic Locks Quality Control
As a Global Leading Manufacturer and Supplier of Hydraulic Door Closers and Electromagnetic Locks, OUBAO sets the benchmark for high-traffic security.
By integrating 6S Management with our MES Quality Traceability System, we provide you with a transparent, digital shield for every project. From the molecular audit of raw materials to 2,000,000-cycle endurance testing, our fire-rated hardware is engineered to outperform ANSI Grade 1 and UL/CE requirements.
Partner with OUBAO to eliminate maintenance risks, safeguard your reputation, and secure your investment with our complete Door Control Solution — backed by an industry-leading 5-Year Warranty.
High-Durability Door Control Devices for Performance and Safety
| Component | OUBAO Standards | Your Benefit |
|---|---|---|
| Spring | High-strength oil-quenched steel | Stable closing force after 2-million-cycle testing. |
| Piston | 60Si2Mn High-tenacity material | Exceptional fatigue and low-temperature resistance. |
| Gear Shaft | 500,000-cycle wear-resistance test | Reliable operation from -40°C to +60°C. |
| Hydraulic Oil | German FUCHS Oil | Industry-leading mechanical life and thermal stability. |
| Machining | 0.01mm – 0.015mm tolerance | Leak-proof hydraulic stability and smooth action. |
| Body | High-strength die-cast aluminum alloy | Integrated molding with superior structural density. |
| Feature | OUBAO Standards | Your Benefit |
|---|---|---|
| Material | DT4-C Electric Pure Iron | Maximum electromagnetic permeability. |
| Structure | CNC integrated molding (Non-welded) | High strength with zero anti-deformation risk. |
| Holding Force | 1.5x Market Average | Higher security than 80% of competing products. |
| Finish | Anodic hardening & Eco-friendly plating | Superior corrosion resistance and aesthetic durability. |
| Release | Optimized circuit design | Zero residual magnetism for immediate emergency exit. |
Certified Assurance
Quality Assurance for Door Closers & Magnetic Locks
Pre-Production Material Integrity Audit
We conduct mandatory spectral analysis on all incoming material. This molecular-level verification ensures high-density structures, preventing material fatigue and magnetic decay even in heavy-duty, high-frequency environments.
- Material Purity: Guarantees stable electromagnetic performance over 10+ years.
- Fatigue Resistance: Specifically engineered for heavy-traffic commercial entries.
Micrometer-Level Precision Process Audit
During CNC machining, our QC specialists enforce a strict 0.01mm–0.015mm tolerance for door closer pistons and magnetic lock housings. This micrometer-level precision creates a non-welded, high-strength structure that guarantees a perfect mechanical seal and eliminates internal leakage.
- Leak-Proof Integrity: Exceeds standard hydraulic pressure requirements.
- Friction Reduction: Smoother operation with significantly reduced mechanical wear.
100% Individual Functional & Latching Verification
Beyond batch sampling, every single unit undergoes automated cycle testing to ensure field-ready reliability. Closers are calibrated from 180° to 0° to optimize latching speeds, while magnetic locks undergo zero-residual checks to ensure immediate fail-safe release.
- Zero-Failure Logic: Each unit is verified for out-of-the-box performance.
- Emergency Compliance: Meets global safety standards for rapid magnetic release.
Engineered Safety
CNAS-Accredited Laboratory Testing
Universal Standards
Certified Reliability for Global Market Entry
Certificate of Constancy of Performance
UL Certificate of Compliance
Test Verification of Conformity
Certificate of Constancy of Performance