1. Product Overview
Key Specifications
Dimensions: 605 × 215 × 175 mm
Weight: 3050g – 4600g
Cable Ports: 4 ports (2 in / 2 out)
Cable Diameter: Ø8 – Ø23 mm
Fiber Capacity:
Bunchy: 48 – 288 cores
Ribbon: up to 1152 cores
Application Scenarios
Aerial installation
Underground installation
Wall-mounted
Pipeline/duct-mounted
Handhole installation
Operating temperature: -40℃ ~ +65℃
2. Required Tools (Provided by Installer)
| Tool | Usage Description |
|---|---|
| Fiber Cutter | Cutting optical fibers |
| Fiber Stripper | Removing the fiber protective coating |
| Band Tape | Measuring fiber length |
| Scissors | General cutting work |
| Metal Wrench | Tightening the core reinforcement nut |
| Screwdriver | Fastening bolts (cross and flat types) |
3. Installation Procedure
Step 1: Preparation & Opening the Closure
Clean the installation area and determine the mounting location.
Lay out all required fiber cables.
Check package contents to ensure all parts are included.
Loosen the closure bolts and open the top cover (no need to remove bolts fully).
Note: In poor weather, set up a tent for waterproof and dustproof protection.
Step 2: Cable Length Determination
38 mm: Distance from seal fitting to cable pressboard
1800 mm: Reserved length for coiling and splicing
50 mm: Reinforced core length for fixation
Step 3: Stripping the Cable
Use cutters and strippers to remove the outer sheath according to your cable marking.
Refer to Drawing 2 for stripping length, or adjust as required on site.
Step 4: Fiber End Preparation
Polish the fiber sheath port, ensuring a smooth surface over a 13 cm section.
Step 5: Sealing Tape Application
Wind sealing tape 41 mm from the cable's rope mouth.
Do not stretch the tape; wrap to a final diameter of 23–25 mm.
Cut the tape with double diagonal cuts for better adhesion.
Step 6: Reinforced Core & Cable Fixation
Remove port plugs and fix the reinforced core using screw holes.
Secure the cable with a hoop clamp on the L bracket.
Use a metal wrench and a screwdriver to tighten all fasteners.
Step 7: Fiber Storage & Routing
Coil the fiber counterclockwise into the splice tray.
For ribbon or central tube fibers, use appropriate routing without strain.
Avoid overtightening cable ties on ribbon fibers.
Step 8: Tray Installation & Fiber Splicing
Fix the splice tray with screws on the hinged flap gate.
Tie the tray to the closure body using the provided straps.
Route the fiber into the tray, make at least one full circle loop, trim excess, then splice (fusion or mechanical).
Step 9: Final Assembly
Insert the base plates into the closure body.
Align and compress the sealing ring.
Secure the cover using a diagonal bolt tightening sequence.
After 10 minutes, re-tighten bolts to ensure firm sealing.
4. Field Testing
A pressure testing valve can be installed for an on-site air sealing test.
Suggested air pressure: 100 KPa ±5 KPa
Submerge the closure in water for 15 minutes; check for air leaks.
5. Additional Recommendations
Maintenance Advice: Regularly inspect the closure for any signs of mechanical stress, cable slippage, or moisture intrusion, especially after storms or excavation near the site.
Labeling: Use fiber labeling sheets to identify fiber routes clearly. This is crucial for future maintenance or expansion.
Documentation: Record all splicing and routing details in a fiber management system or maintenance log to ensure traceability.
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