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GYTY53 Heavy-Duty Direct Buried Cable – Dual Steel Tape Armor, Stranded Loose Tube
Good mechanical properties, good high temperature resistance
Loose casing with high strength and resistance to hydrolysis
Special casing filler plays a key role in protecting optical fibers
Anti-extrusion, good flexibility
PSP enhanced moisture resistance
Good water resistance
What is GYTY53 Heavy-Duty Fiber Direct Buried Cable
The GYTY53 type optical cable places the 250um optical fiber in a loose sleeve made of high modulus plastic, and the sleeve is filled with waterproof filler. The center of the core wire is a steel wire and a PE sheath. As a metal reinforcement, the sleeve and the filler are wound around the reinforcement to form a compact circular cable core. The filler fills the inside of the cable core to prevent water from entering, and the outer cover is a thin PE inner sheath. After the inner sheath covers the PSP in the longitudinal direction, the PE outer sheath is wrapped to form a cable.
GYTY53 Optical Fiber cable Specification parameters
- Specification parameters
- OPTICAL CHARACTERISTICS
optical properties
| G.652 | G.655 | 50 / 125μm | 62.5/125 μm | ||
| Attenuation (+20℃) | @850nm | ≤3.0 dB/km | ≤3.0 dB/km | ||
| @1300nm | ≤1.0 dB/km | ≤1.0 dB/km | |||
| @1310nm | ≤0.36 dB/km | ≤0.40 dB/km | |||
| @1550nm | ≤0.22 dB/km | ≤0.23dB/km | |||
| Bandwidth (Class A) | @850nm | ≥500 MHz·km | ≥200 MHz·km | ||
| @1300nm | ≥1000 MHz·km | ≥600 MHz·km | |||
| Numerical Aperture | 0.200±0.015NA | 0.275±0.015NA | |||
| Cable Cut-off Wavelength | ≤1260nm | ≤1480nm | |||
| Storage/Operating temperature | -40℃ ~+70℃ |
Technical parameters
Model | Fiber Count | Tubes | Fillers | Outer Diameter (mm) | Weight (kg/km) | Tensile Strength Long/short term N | Crush Resistance Long/short term N/100mm | Bending Radius Static/ Dynamic mm |
GYTY53-2~6F | 2~6 | 1 | 5 | 13.0 | 169 | 1690/3000 | 300/1000 | 10D/20D |
GYTY53-8~12F | 8~12 | 2 | 4 | 13.0 | 169 | 1690/3000 | 1000/3000 | 10D/20D |
GYTY53-14~18F | 14~18 | 3 | 3 | 13.0 | 169 | 1690/3000 | 1000/3000 | 10D/20D |
GYTY53-20~24F | 20~24 | 4 | 2 | 13.0 | 169 | 1690/3000 | 1000/3000 | 10D/20D |
GYTY53-26~30F | 26~30 | 5 | 1 | 13.0 | 169 | 1690/3000 | 1000/3000 | 10D/20D |
GYTY53-32~36F | 32~36 | 6 | 0 | 13.0 | 169 | 1690/3000 | 1000/3000 | 10D/20D |
Product Structure & Composition
Outer jacket – PE layer, protects against moisture, UV, abrasion, and mechanical damage.
PSP (corrugated steel tape) – Crush/rodent resistance and moisture barrier.
Inner jacket – PE layer for extra mechanical and thermal insulation.
Central strength member – Steel or FRP rod for tensile support and tube stability.
Rip cords – Embedded threads for easy jacket removal without tools.
Loose tube (PBT) – Holds fibers, allows free movement, resists stress and moisture.
Fiber – Glass core/cladding for optical signal transmission.
Thixotropic gel – Water‑blocking gel in tube prevents moisture ingress and micro‑bends.
Filling compound – Petroleum‑jelly or swellable material filling core gaps to block water migration.
Benefits of GYTY53 Optical Fiber cable
Good mechanical & thermal performance
Combines good mechanical properties, anti-extrusion, good flexibility, and high temperature resistance.
High-strength & hydrolysis-resistant loose tube
Features a loose casing with high strength and resistance to hydrolysis.
Special filler for fiber protection
The casing filler plays a key role in protecting optical fibers.
Enhanced moisture & water resistance
Includes PSP (corrugated steel tape) for enhanced moisture resistance and overall good water resistance.
Engineering Applications GYTY53 Optical Fiber cable
Long‑haul trunk line direct burial projects
Used along highways, farmlands, or open fields for inter‑provincial or cross‑regional fiber backbone networks. The double sheath + steel tape armor of GYTY53 resists soil corrosion, rodent bites, and light surface crushing, ensuring long‑term communication stability.
Direct buried connection between substations in power systems
Applied in short‑haul fiber links between two substations where trenchless crossing is required. The cable provides excellent water blocking and crush resistance to withstand backfill soil pressure and subsequent mechanical vibration, making it suitable for power utility environments.
Fiber monitoring projects along oil & gas pipelines
Laid along oil or natural gas pipelines for leak detection, temperature sensing, or security communication. The heavy‑duty construction resists excavation impact and chemical corrosion during pipeline maintenance, while the rodent‑proof armor reduces field rat damage, ensuring reliable monitoring system operation.
Shipping & Packaging
Packaging Requirements:
1：All cables shall be wound on treated wooden spools that are not returnable
2：Cable ends must be firmly secured to the spool and protected with waterproof shrink caps
3：Each spool must include:
1、 Protective plastic wrapping layer
2、 Reinforcing wooden slats for stability
3、 Minimum 1m of free cable end for testing purposes
4、 Standard spool length: 3000mm (±2% tolerance allowed)
Cable Identification:
The outer jacket must display:
1、Unique sequential numbering every 1m (±1% variance permitted)
2、 Additional repeating markings at 1m intervals showing:
1、 Product code and fiber count
2、 Manufacturer identification
3、 Production date (month/year)
4、Total cable length
Standard Packaging Dimensions:
| Length | Container | Size (L×W×H) | Net Mass | Total Mass |
|---|---|---|---|---|
| 2 km | Wood spool | 90×75×90 cm | 156 kg | 220 kg |
| 3 km | Wood spool | 100×68×100 cm | 240 kg | 280 kg |
| 4 km | Wood spool | 109×75×109 cm | 300 kg | 368 kg |
| 5 km | Wood spool | 129×72×129 cm | 400 kg | 480 kg |
Technical Reference:
1、 Standard cable diameter: 10.0mm
2、Maximum span distance: 100m
3、Contact sales team for complete technical specifications
Spool Marking Standards:
Permanent markings (minimum 25-30mm height) must appear on both sides of each spool:
1、 Company name and trademark
2、Contained cable length
3、Cable specifications (type/fiber count)
4、Winding orientation
5、Weight measurements (gross/net)
Note: All wooden packaging materials must undergo proper fumigation treatment prior to use.
Product Comparison：
GYTY53 vs GYTS vs GYTA vs GYXTW
| Feature / Dimension | GYTY53 (Double Sheath + Corrugated Steel Tape Armor) | GYTS (Stranded Steel Tape Armor) | GYTA (Stranded Aluminum Tape Armor) | GYXTW (Central Tube Steel Tape Armor) |
|---|---|---|---|---|
| Structural Features | Central metal strength member, loose tubes with water-blocking compound, stranded, filled with water-blocking filler, wrapped, corrugated steel tape armor, inner and outer double PE sheaths. | Central metal strength member, loose tubes with water-blocking gel, water-blocking filler in cable core, longitudinally wrapped PSP steel tape, extruded PE sheath. | Central metal strength member, loose tubes with water-blocking gel, water-blocking filler in cable core, longitudinally wrapped APL aluminum tape, extruded PE sheath. | Central loose tube with water-blocking gel, two parallel steel wire strength members, steel tape armor, PE sheath. Compact structure, small diameter, light weight. |
| Typical Applications | Direct burial, duct, aerial (with messenger). Suitable for long-haul communication, inter-office links, excellent mechanical damage resistance. | Aerial (with messenger), duct. Suitable for long-haul and inter-office communication, especially where high crush resistance is required. | Aerial (with messenger), duct. Suitable for long-haul communication, LAN installation, especially where moisture resistance is critical. | Aerial, duct. Suitable for long-haul and inter-office communication, general outdoor applications. |
| Fiber Core Capacity | 2 – 144 cores | 2 – 288 cores (up to 432 or even 576 cores) | 2 – 144 cores | 2 – 144 cores |
| Pros in Engineering | Double sheath plus corrugated steel tape armor provide excellent tensile and crush resistance, ideal for harsh direct burial environments. Full-section water-blocking, good moisture resistance. | Steel tape armor gives good crush resistance and some bullet resistance. Compact structure prevents tube shrinkage. | Aluminum tape provides excellent moisture barrier, better than steel tape for moisture/corrosion resistance. Full-section water-blocking, lighter weight, good environmental stress crack resistance. | Compact, small diameter, light weight, easy installation. Parallel steel wires offer moderate strength, relatively low cost. |
| Cons in Engineering | Double sheath + steel armor results in larger outer diameter and heavier weight. Larger bending radius (static ≥12.5D). Higher pulling resistance in ducts. | Steel tape has weaker corrosion resistance than aluminum tape. Single-layer armor makes long-term reliability in direct burial or wet environments slightly lower than GYTY53. | Aluminum tape has lower crush resistance than steel tape, not suitable for direct burial or extremely high mechanical strength environments. | Lower crush and tensile strength compared to stranded designs. Not suitable for direct burial. Greater difficulty in fiber excess length control for high core counts. |
| Cost (Relative) | Medium to high. Double sheath and steel tape increase material cost. Suitable for core networks demanding high mechanical performance. | Medium. Steel tape armor offers moderate cost – one of the most common outdoor armored cable types, good cost-performance ratio. | Medium to low. Aluminum tape material cost is lower than steel tape, making overall cost relatively lower, suitable for large‑scale access layer deployment. | Low. Simple structure gives significant cost advantage for low fiber counts. Ideal for cost‑sensitive access projects. |
| Maintenance Difficulty | Moderate. Heavier structure makes installation somewhat more difficult, but excellent mechanical protection reduces fault rate, resulting in manageable long‑term maintenance cost. | Low to moderate. Classic design with mature installation/maintenance practices. Steel tape provides good protection and maintainability. | Low. Aluminum tape is light and corrosion‑resistant, easier to install and maintain. | Low. Simple, small diameter, easy to install and maintain. |
| Typical Outer Diameter | Approx. 12.0 – 15.0 mm (24–72 cores) | Approx. 10.0 – 17.5 mm (24–144 cores) | Approx. 10.0 – 16.0 mm (2–144 cores) | Approx. 8.3 mm (2–24 cores) |
| Temperature Range | -40°C to +70°C | -40°C to +70°C | -40°C to +70°C | -40°C to +60°C |
| Main Suitable Environment | Direct burial, mountainous slopes, wet soil, environments prone to mechanical damage. | Aerial, duct, mountainous areas, general outdoor armored applications. | Duct, aerial, wet environments, applications requiring high moisture protection. | Aerial, duct, urban access networks, small core count rapid deployment. |
GYTY53 Optical Fiber cable Selection Guide
GYTY53 Fiber optic cable Installation Guide
1. Pre-Installation Check: Inspect the cable reel and outer sheath for damage. Measure fiber attenuation using an OTDR and compare with factory test results.
2. Trench Preparation (for direct burial): Excavate trench to minimum depth of 800 mm for road crossings or 1.2 m for farmland. Trench bottom must be flat with a layer of fine sand or soft soil.
3. Cable Laying: Maintain pulling tension below 1500 N (short‑term) and 600 N (long‑term). Bending radius: ≥25× cable OD during pulling, ≥12.5× cable OD after installation. Use lubricant when pulling through ducts.
4. Backfilling: Place cable on the prepared trench bottom. Cover with a 100 mm layer of fine sand. Lay warning tape 200‑400 mm above the cable. Backfill carefully to avoid sharp stones.
5. Acceptance Testing: Perform OTDR test to ensure attenuation ≤0.40 dB/km at 1310 nm and ≤0.30 dB/km at 1550 nm. Verify fiber continuity and splice quality.
Download YRTFIBER Product Catalog
Factory Real Shot
Stranding & Sheathing Line
General view of the cable core assembly zone.
GYFTY53 Manufacturing Plant Overview
A clean and well‑organized production floor.
Raw Material Storage
FRP rods, loose tubes, steel tape, and PE compounds.
Factory Warehouse & Dispatch
Ready‑to‑ship fiber cable coils awaiting delivery.
Frequently Asked Questions & Quick Inquiry
GYTY53 Optical Fiber cable FAQ
1. What is the GYTY53 fiber optic cable used for?
GYTY53 is a heavy-duty armored outdoor fiber optic cable, ideal for direct burial or duct installation. It provides excellent mechanical protection, making it suitable for long-distance and backbone fiber networks.
2. What is the cable structure?
This cable features a stranded loose tube design with optical fibers filled with water-blocking gel. It includes two layers of steel tape armor and a polyethylene outer sheath for superior protection against moisture, rodents, and crushing.
3. What fiber type does it use?
GYTY53 uses G652D，G655. single-mode fiber , and 50 / 125μm，62.5/125 μm multimode fiber, known for its low attenuation and high performance in long-haul optical communication systems.
4. Is this cable suitable for underground installation?
Yes. GYTY53 is specifically designed for direct burial in the ground. Its dual armor layers provide strong resistance to pressure, water, and environmental stress, ensuring long-term durability underground.
5. What environments or applications is GYTY53 ideal for?
It is widely used in:
Backbone telecom infrastructure
Railway and highway communication
Military and utility networks
Outdoor trenching and pipeline installations
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