Your Professional Fiber Optic Splice Closure Supplier

 

DIMI is a professional manufacturer of high-reliability fiber-optic products, delivering precision engineering, certified quality, and scalable production.

 

We run two ISO-certified plants (12,800 m², incl. 2,100 m² clean areas) with 22 CNC machining centers, 10 die-casting machines (Zn/Al), 16 high-tonnage stamping presses, 12 injection-molding cells, and in-house anodizing, powder coating, and hot-dip galvanizing—covering suspension clamps, dead-end/tension clamps, brackets, hangers, and closure hardware.

 

 
 
Why Choose Us
Custom Engineered Assemblies
We integrate advanced engineering design, flexible manufacturing processes, and rigorous quality assurance protocols to deliver customized assemblies and hardware solutions that enable rapid deployment and reliable long-term performance.
ISO Certification
We are certified to ISO 9001:2015 and TL-9000 standards, reflecting our steadfast commitment to excellence in quality management systems.
Production Capabilities
Our fiber optic cable assembly production capabilities include automated cable cutting, stripping, and termination equipment, capable of processing more than 10,000 assemblies per day with high precision and consistency.

 

Parameter

Material

PP+GF (Polypropylene + Glass Fiber)

Cable Port Quantity

4 Ports (2 In + 2 Out)

Cable Port Type

2 Round ports + 1 oval port (optional configurations)

Sealing Type

Mechanical Seal (Rotary Compression)

Cable Diameter Range

Φ8–18mm (round ports), Φ10–20mm (oval port)

Splice Capacity (Maximum)

48 Fibers

Splice Tray Capacity

12 Fibers per tray

Splice Tray Count (Maximum)

4 Trays

Protection Grade

IP68 (submersion resistant to 1.5m for 60 minutes)

Operating Temperature

-40°C to +65°C

Storage Temperature

-40°C to +60°C

Relative Humidity

≤95% at +30°C

Atmospheric Pressure

70–106 kPa

Application

Aerial, Duct, Pole/Wall Mount, Handhole, Direct Burial

Splice Tray Size

Standard 12F tray: approx. 140mm × 110mm

Closure Size (D × H)

Φ120mm × 300mm

Weight

Approximately 1.5–1.8 kg (with trays and accessories)

Compliance

IEC, Telcordia GR-771, RoHS, REACH

 

 
 
Benefits of Fiber Optic Splice Closure
48 Fibre Optic Splice Closure
 

Protection Against Environmental Factors
Fiber optic splice closures protect fiber connections from environmental threats like moisture, temperature fluctuations, and contamination. Advanced designs use sealing barriers to prevent water ingress, which can cause signal attenuation and corrosion. High-quality materials ensure stability during temperature changes and prevent stress-induced fiber breaks. Sealed environments and filtration systems block dust and particles, maintaining reliable optical performance.

 

Prevention Of Physical Damage
Fiber optic splice closures provide mechanical protection through vibration resistance, impact resistance, and strain relief. Vibration-damping materials and flexible mounting systems shield internal components in high-disturbance environments like traffic or industrial areas. Reinforced housings and strategic designs protect connections from impacts during construction,maintenance, or vandalism.

 

Improved Signal Performance
Fiber optic splice closures ensure reliable signal quality by maintaining stable environmental conditions and controlling humidity to prevent moisture-induced signal loss. Sealed enclosures protect optical performance from external weather changes. Rigid designs and precise mounting systems eliminate movements that could disrupt splice alignment and degrade performance. Effective sealing prevents contamination while preserving optical interface quality and connection stability over time.

 

Simplified Maintenance
Fiber optic splice closures improve maintenance with tool-free opening mechanisms for quick access, reducing service time and costs. Organized internal layouts, with color-coded trays and clear labels, simplify splice identification and speed up troubleshooting. Modular designs allow field replacement of sealing elements and splice trays without replacing the entire closure. This reduces inventory needs, extends service life, and guarantees cost-effective maintenance.

 

Enhanced Network Longevity
Long-term network reliability relies on fiber optic splice closures preventing degradation over time. Effective sealing and quality materials protect components from corrosion and UV-induced damage. Advanced polymers and coatings safeguard enclosures from sunlight and maintain integrity during extended exposure. Engineering designs also address thermal cycling, preventing material fatigue and preserving sealing effectiveness across temperature changes.

 

Support For Scalability
Fiber optic splice closures with expandable tray systems and modular designs support growing bandwidth demands without requiring full infrastructure replacements. Future-proofing features, like standardized interfaces and adaptable configurations, ensure compatibility with evolving technologies.

144 Fibers 2In-4Out Dome Fiber Optic Splice Closure

 

Application of Fiber Optic Splice Closure
 

Using in Telecommunications Networks
In traditional telecommunications networks, fiber optic splice closure is used extensively. They are deployed in both long-haul and local loop installations. For long-haul networks, which span vast distances, fiber optic box are vital for maintaining the integrity of the fiber optic cables. When fiber optic cables are laid over hundreds or even thousands of kilometers, there are inevitable breaks or the need to connect different cable segments. Fiber splice box provides a secure environment for splicing these fibers together.

 

Using in Data Centers
Data centers are the nerve centers of modern digital infrastructure. With the exponential growth of data traffic, fiber optic connectivity within data centers has become more critical than ever. Fiber optic splice closure is used to manage the complex network of fiber optic cables within data centers.

 

Using Cable Television (CATV) Networks
In CATV networks, fiber optic splice closure is used to distribute video and other multimedia signals. As fiber optic cable providers strive to offer high-definition and ultra-high-definition programming, fiber optic has become the preferred medium for signal transmission.

 

Working Of Fiber Optic Splice Closure

 

Fusion Splicing

This is the most common method, where the two fiber ends are precisely aligned and then welded together using an electric arc. Fusion splicing offers the lowest loss and least reflectance, as well as the strongest and most reliable joint between fibers.

 

Mechanical Splicing

This method aligns the fiber ends in a specially designed mechanical fixture that holds the fibers together in alignment. Mechanical splices are quicker and easier to perform than fusion splices but typically have higher loss and are less reliable.

 

 

Logistics

We will help you to choose the best shipping way according to your detail requirements. By sea, by air, or by express, etc.

 
 

The time frame of an order delivery is divided into two parts

Processing time: 7-14 Days
Shipping time: 20~30 Days

 
 
 

Shipping methods

 

DDP, DAP, EXW, etc.

 
 
 
 

Shipping fee

 

The shipping fee will be changed according to every pacel's weight.

 

 

 

FAQ

 

Q: What is Fiber Optic Splice Closure?

A: Fiber Optic Splice Closure is a closed container used to protect the fiber optic splice point. It provides internal space to accommodate excess fiber and fusion protection sleeves and has good sealing performance. It is used for outdoor cable splicing and repair.

Q: What is the basic structure of Fiber Optic Splice Closure?

A: The basic structure of Fiber Optic Splice Closure includes the box body, box components, sealing ring, and lock buckle. Box body: generally made of metal or high-strength plastic material, providing space to accommodate internal components and fiber. Box components: used to store fusion protection sleeves and excess fiber, generally with a modular structure for easy management. Sealing ring: set at both ends of the box body to ensure the sealing performance when the fiber enters and exits. Lock buckle: used to lock the sealing ring to prevent seal failure caused by internal and external air pressure.

Q: What are the testing requirements for Fiber Optic Splice Closure?

A: The common testing items for Fiber Optic Splice Closure are: Tensile strength test: check the maximum tensile force that the box body can withstand and whether it meets the requirements. Waterproof test: test the protection level of the junction box, such as whether IP68 and IP65 meet the standards. Temperature cycle test: test the performance changes under high and low temperature environments, such as the changes in joint loss. Aging test: long-term environmental exposure test to check the durability performance of the product. Fusion joint test: check whether the fusion joint loss is within the allowable range.

Q: How to choose the appropriate Fiber Optic Splice Closure?

A: The selection of Fiber Optic Splice Closure mainly considers: Protection level: select according to the use environment, the highest in the well. Capacity: choose the appropriate specification according to the number of access fiber cores, and a small capacity will affect the fusion efficiency. Structural form: buried type, overhead type, handhole type, or distribution box can be selected. Sealing method: O-ring sealing or heat sealing can be selected, and heat sealing has better sealing effect.

As one of the most professional fiber optic splice closure manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to wholesale custom made fiber optic splice closure from our factory.

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