Fiber Optic Closure Horizontal Type
Outdoor Heat Shrink Splice Closure for Aerial,
Underground and Duct Applications
Outdoor horizontal closure, Heat Shrink, 2 in 2 out
The horizontal fiber optic closure provides environmental protection for fiber splice points in outdoor telecommunications networks. Designed for heat shrink sealing with 2-in/2-out cable configuration, this closure accommodates straight-through and branch connections for optical cables up to 17mm diameter.
Suitable for aerial, underground, and duct installation environments, the closure protects up to 60 fiber splices with organized tray management and reliable environmental sealing. The half-rectangular ABS housing provides mechanical strength while maintaining lightweight installation characteristics.
Key Features
Versatile Installation Applications
Supports aerial (overhead), underground direct burial, and duct/conduit installations. Compatible with straight-line connections and branch configurations (1-to-2, 1-to-3) for network distribution and expansion.
Robust Environmental Protection
Heat shrink sealing combined with adhesive rubber strips and sealing tape provides reliable protection against moisture ingress. Re-openable design allows maintenance access without compromising long-term seal integrity.
High-Strength Construction
Imported high-grade ABS engineering plastic housing formed under high-pressure molding. Lightweight design (2.3 kg) reduces installation effort while maintaining mechanical strength exceeding 2000N/10cm lateral pressure resistance.
Flexible Cable Entry
Four different cable loop sizes (Ø5mm, Ø17mm, Ø20mm, Ø22mm) accommodate various cable diameters. Multiple entry options enhance installation flexibility and ensure proper sealing across different cable types.
Organized Fiber Management
Overlapping fiber splicing trays with separate insulation and grounding units provide organized splice storage. Minimum 1.6m fiber storage per tray maintains proper service loops for future maintenance.
Corrosion-Resistant Components
Stainless steel mounting hardware and fixing units withstand harsh environmental conditions. Reusable components support multiple installations and relocations without degradation.
Standards Compliance
Design and performance meet National YD/T814-1996 standards for outdoor fiber optic closures, ensuring consistent quality and compatibility with telecom infrastructure requirements.
Technical Specifications
| Parameter | Specification |
|---|---|
| Dimensions (H×W×D) | 435 mm × 190 mm × 80 mm |
| Weight | 2.3 kg |
| Housing Material | High-strength ABS engineering plastic |
| Sealing Method | Heat shrink with adhesive rubber strips |
| Cable Entry Configuration | 2 in / 2 out |
| Cable Diameter Range | Up to Ø17 mm |
| Cable Loop Sizes | Ø5 mm, Ø17 mm, Ø20 mm, Ø22 mm |
| Fiber Capacity | 60 cores (single configuration) |
| Fiber Winding Radius | ≥40 mm |
| Fiber Storage Length | ≥1.6 m per tray |
| Insertion Loss (Fiber Tray) | ≤0.01 dB |
| Lateral Pressure Resistance | ≥2000 N / 10 cm |
| Impact Resistance | ≥20 N·m |
| Operating Temperature | -25°C to +60°C |
| Storage Temperature | -40°C to +70°C |
| Relative Humidity | 93% at +30°C |
| Standards Compliance | YD/T814-1996 |
| Hardware Material | Stainless steel (corrosion-resistant) |
Applications
Aerial (Overhead) Installations
Pole-mounted splice points for aerial fiber cable networks. Lightweight construction and robust housing withstand wind loading, temperature cycling, and environmental exposure.
Underground Direct Burial
Protected splice enclosures for cables installed in trenches without conduit. Heat shrink sealing and pressure-resistant housing maintain splice integrity in buried applications.
Duct and Conduit Systems
Splice protection for cables pulled through underground conduit systems. Compact design fits standard manholes and handholes while providing adequate working space.
Branch Connection Points
Network distribution nodes where single feeder cables branch to multiple drop cables. Supports 1-to-2 and 1-to-3 configurations for neighborhood distribution and access networks.
Straight-Through Connections
Mid-span splice points extending cable runs or repairing damaged cable sections. Organized tray system maintains proper fiber identification and routing.
Installation Advantages
Heat Shrink Sealing
Heat shrink closure method creates reliable environmental seal without specialized tools. Field-proven sealing technology maintains long-term protection in demanding outdoor environments.
Re-Openable Design
Non-vulcanized sealing materials allow closure to be reopened for maintenance, troubleshooting, or network modifications without destroying sealing components.
Organized Splice Management
Overlapping tray design provides clear fiber routing paths. Adequate storage length (≥1.6m) ensures proper service loops for future splicing or repairs.
Low Insertion Loss
Fiber tray design maintains minimum bend radius (≥40mm) throughout storage area. Controlled fiber routing ensures insertion loss remains below 0.01dB.
Multiple Cable Sizes
Four cable loop options accommodate varying cable diameters without adapters or improvised sealing solutions. Proper cable-to-loop matching ensures reliable environmental seal.
Separate Grounding
Dedicated grounding unit provides secure electrical bonding for cable armor and metallic components. Isolated from splice area to maintain signal integrity.
Installation Environments
Aerial Pole Mounting
Suitable for attachment to utility poles using standard mounting hardware. Compact profile minimizes wind loading while providing adequate splice capacity.
Underground Vaults
Fits standard telecommunications manholes and handholes. Mounting provisions allow secure positioning preventing movement during maintenance access.
Buried Direct Installation
Pressure-resistant housing withstands soil loading and compaction forces. Heat shrink sealing prevents moisture ingress in high water table conditions.
Harsh Environmental Conditions
Operating temperature range (-25°C to +60°C) covers Pakistan’s diverse climate zones from mountainous regions to desert environments. Humidity tolerance (93% at 30°C) ensures reliable performance in monsoon conditions.
Quality Features
Mechanical Strength
Lateral pressure resistance exceeding 2000N/10cm protects splices from external loading during burial or accidental impact. High-strength ABS material resists cracking and UV degradation.
Anti-Corrosion Protection
Stainless steel hardware eliminates rust and corrosion in coastal, industrial, and high-humidity environments. Long service life reduces replacement frequency and maintenance costs.
Lightning Protection
Non-conductive ABS housing provides electrical isolation. Proper grounding of metallic cable components through dedicated grounding unit protects against induced voltages.
Seal Integrity
Multi-layer sealing approach with heat shrink, adhesive rubber strips, and sealing tape creates redundant protection against moisture. Re-openable design maintains seal quality through multiple access cycles.
Fiber Management Details
Splice Tray Organization
Overlapping tray configuration allows sequential access to fiber layers without disturbing completed splices. Clear routing paths reduce installation time and errors.
Capacity and Expansion
60-fiber capacity accommodates typical distribution splice requirements. Modular tray design allows capacity adjustment based on actual fiber count.
Bend Radius Protection
All fiber routing maintains minimum 40mm bend radius throughout storage area. Controlled bending prevents signal degradation and long-term fiber damage.
Service Loop Storage
Minimum 1.6m fiber storage per tray provides adequate length for future re-splicing, repairs, or network reconfigurations without cable replacement.
Standards and Compliance
National Standards
Complies with YD/T814-1996 specifications for outdoor fiber optic closures. Performance parameters meet or exceed standard requirements for mechanical strength, environmental protection, and optical performance.
Material Safety
ABS plastic housing meets fire resistance and environmental safety requirements. Stainless steel components eliminate toxic corrosion products.
Ordering Information
When ordering, please specify:
- Quantity – Number of closures required
- Installation environment – Aerial, underground, or duct application
- Cable specifications – Diameter and type of cables to be spliced
- Fiber count – Total number of fibers requiring splice capacity
- Mounting requirements – Any specific mounting hardware needed
Related Products
- Fusion Splicing Equipment
- Fiber Optic Splice Trays
- Heat Shrink Tubing and Sealing Materials
- Cable Preparation Tools
- OTDR Testing Equipment
- Fiber Cleaning Supplies
Technical Support
Our engineering team provides:
- Closure selection guidance based on network architecture
- Installation procedure recommendations
- Sealing technique training and support
- Troubleshooting assistance for field applications
- Custom configuration recommendations
