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GYTA Stranded Loose Tube Light Armored Fiber Optic Cable – Aluminum Tape Armor, Anti-EMI
Good mechanical properties, good high temperature resistance
High-strength loose casing, resistant to hydrolysis
Special casing fillers play a key role in protecting optical fibers
Specially designed compact structure prevents loose casing shrinkage
Excellent PE sheath protects fiber optic cable from UV radiation
Aluminum polyethylene laminate as a moisture barrier
What is GYTA Fiber Optic Cable
The GYTA cable places a 250 μm fiber in a loose sleeve made of high modulus plastic. The sleeve is filled with waterproof filler, and there is a steel wire in the center as a metal reinforcement. For high-core cables, PE is sometimes coated. The sleeve and filler are twisted around the reinforcement to form a compact round cable core. The cable core is covered with a layer of APL and filled with waterproof filler to prevent water from penetrating. Finally, the cable is completed with a PE jacket.
GYTA armored Fiber Optic Cable Specification parameters
- Specification parameters
- OPTICAL CHARACTERISTICS
| 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 cores | Tubes | Diameter(mm) | Weight(kgs) | Tensile(N) | Crush(N) | Bending radius | ||
| Long term | Short term | Long term | Short term | Static/ Dynamic | |||||
| GYTA-12 ~ 36F | 12~36 | 2~6 | 9.2 | 80 | 800 | 1500 | 300 | 1000 | 10D/20D |
| GYTA-38 ~ 72F | 38~72 | 2~6 | 10.5 | 80 | 1000 | 3000 | 300 | 1000 | 10D/20D |
| GYTA-74 ~ 96F | 74~96 | 7~8 | 13.2 | 125 | 1500 | 3000 | 300 | 1000 | 10D/20D |
| GYTA-98 ~ 120F | 98~120 | 9~10 | 14.6 | 180 | 1800 | 3000 | 300 | 1000 | 10D/20D |
| GYTA-122 ~ 144F | 122~144 | 11~12 | 16.5 | 220 | 2000 | 3000 | 300 | 1000 | 10D/20D |
Product Structure & Composition
Outer sheath: Black PE, UV‑, corrosion‑, and abrasion‑resistant; protects the cable core.
APL (aluminum‑plastic composite tape): Longitudinally wrapped, provides moisture resistance, water blocking, crush resistance, and EMI shielding.
Water‑blocking layer (inside the APL): Swellable tape/yarn that stops longitudinal water penetration.
Central strength member: Steel wire or FRP rod, bears tensile loads during installation and operation.
Loose tube (PBT): Houses fibers loosely, buffers external stress.
Optical fiber: Single‑mode (e.g., G.652D/G.655), ensures low‑loss, high‑bandwidth transmission.
Water‑blocking gel inside tube: Thixotropic, protects fibers, prevents moisture ingress, and does not affect micro‑bending performance.
Benefits of GYTA armored Fiber Optic Cable
1. Excellent mechanical and environmental protection
It offers good mechanical strength and high temperature resistance. The high-quality PE outer jacket provides effective UV protection, while the aluminum‑polyethylene laminate (APL) acts as a reliable moisture barrier.
2. Advanced fiber protection and structural design
It features a high‑strength, hydrolysis‑resistant loose tube. Special filling compounds inside the tube play a key role in protecting the optical fibers. The specially designed compact structure prevents loose tube shrinkage, ensuring long‑term stability.
Engineering Applications GYTA armored Fiber Optic Cable
1. Highway pipeline projects
In highway electromechanical projects, GYTA cable is widely laid in underground ducts along the roadside. Its aluminum-laminated tape and moisture-blocking design protect the fibers from groundwater and soil corrosion, ensuring reliable transmission for toll stations, surveillance cameras, and traffic control systems.
2. Large-scale water conservancy
For major water diversion or irrigation schemes, GYTA cable serves as the backbone of the communication network. The cable’s resistance to side pressure and temperature variation guarantees stable data exchange between remote pumping stations, valves, and central dispatch centers, even in humid or submerged environments.
3. Overhead relocation in urban renovation
During town road upgrades or rural infrastructure projects, GYTA cable is often installed aerially on existing poles. The aluminum armor provides sufficient protection against falling debris and light impacts, while the lightweight design and fast deployment make it cost-effective for temporary or congested areas.
4. Industrial monitoring and harsh environments
In steel plants or chemical facilities, GYTA cable can be suspended on high-temperature bridge racks to carry gas or vibration sensor data. For extreme climates such as plateau railways or frozen soil regions, armored variants like GYTA53 withstand sub‑zero temperatures and mechanical stress, ensuring long‑term operation of critical communication links.
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:
A protective outer layer of plastic wrapping
Reinforcing wooden slats to ensure stability
At least 1 meter of free cable end reserved for testing
A standard spool length of 3000mm (with a permissible tolerance of ±2%)
Cable Identification:
The outer jacket must display:
1、Unique sequential numbering every 1m (±1% variance permitted)
2、 Additional repeating markings at 1m intervals showing:
Product code and fiber count
Manufacturer identification
Production date (month/year)
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：
GYTA vs GYTS vs GYXTW
| Feature / Dimension | GYTA (Aluminum Tape Armor) | GYTS (Steel Tape Armor) | GYXTW (Central Tube, Steel Tape Armor) |
|---|---|---|---|
| Structure Type | Stranded loose tube around central metal strength member | Stranded loose tube around central metal strength member | Central tube with two parallel steel wires |
| Armor Material | Corrugated aluminum tape (APL) | Corrugated steel tape (PSP) | Corrugated steel tape (PSP) |
| Outer Sheath | Polyethylene (PE) - UV resistant | Polyethylene (PE) - UV resistant | Polyethylene (PE) - UV resistant |
| Fiber Core Capacity | 2 - 144 cores (up to 432 cores in some designs) | 2 - 288 cores (up to 576 cores) | 2 - 24 cores (max 48 cores) |
| Typical Applications | Duct, aerial (with messenger), direct burial (light duty). Preferred for wet or coastal areas due to corrosion resistance. | Duct, aerial (with messenger), direct burial. Suitable for harsh environments requiring high crush resistance. | Aerial (with messenger), duct, light direct burial. Ideal for low‑core‑count access networks and FTTH. |
| Engineering Pros | Excellent moisture barrier and corrosion resistance (aluminum does not rust). Lighter than steel armor. Good for long‑term duct installation. | High crush and tensile strength, excellent mechanical protection (rodent, bullet). Robust for direct burial and rocky terrain. | Compact, small diameter, light weight, low cost. Easy to install in ducts or on poles. Simple structure reduces installation time. |
| Engineering Cons | Lower crush resistance than steel armor. Aluminum is softer - not suitable for extreme mechanical stress. Requires careful handling during backfill. | Heavier and stiffer than GYTA. Steel tape can corrode if sheath is damaged. Larger bending radius. | Limited core count, poor crush resistance compared to stranded designs. Not recommended for long direct burial or high‑stress environments. |
| Corrosion / Moisture Resistance | Excellent (aluminum naturally resistant, full water‑blocking compound) | Good, but steel can rust when coating is damaged; moisture ingress possible at cut points | Good, same as GYTS (steel tape), but shorter water blocking path due to central tube |
| Crush Resistance | Moderate (typical 1000 N/100mm) | High (typical 3000 N/100mm or more) | Moderate (similar to GYTA, but central tube structure less tolerant) |
| Installation Flexibility | More flexible than GYTS, easier to handle in ducts | Stiffer, requires larger pulling force and bend radius | Very flexible due to small diameter, easy to route in congested ducts |
| Cost (Relative) | Medium (aluminum tape is cheaper than steel tape) | Medium to high (steel armor increases material and transport cost) | Low (simple construction, best cost‑performance for low fiber counts) |
| Maintenance Difficulty | Low - corrosion resistance reduces long‑term issues; mid‑span access easier than steel armor | Moderate - heavier armor makes repairs harder; must inspect for rust at sheath damage points | Low - simple structure, easy to splice and maintain, but limited protection may lead to higher fault rate in harsh environments |
GYTA armored Fiber Optic Cable Selection Guide
Engineering selection between GYTA and GYTS:
GYTA uses aluminum tape armor, offering superior corrosion and moisture resistance compared to GYTS. This makes GYTA ideal for wet environments, coastal areas, or long‑term duct installation where rust is a concern. GYTS, on the other hand, uses steel tape armor, providing much higher crush resistance, better protection against rodents and bullets. It is preferred for direct burial in rocky terrain, aerial routes with high mechanical stress, or any application where side pressure is a major factor.
Flame retardancy and UV resistance considerations:
For outdoor long‑term exposure (aerial or duct), both GYTA and GYTS have PE sheaths with excellent UV resistance, but they are not flame‑retardant. They should NOT be used indoors (e.g., equipment rooms, tunnels, high‑rise buildings) unless a flame‑retardant variant (GYTZA or GYTZS) is specified. For core network entry sections (typically ≥500 m per segment) or fire‑sensitive areas, always choose LSZH‑sheathed cables (GYTZA/GYTZS) instead of standard GYTA/GYTS.
Non‑flame‑retardant cable applications:
GYTA is a classic "duct cable" - its PE sheath provides excellent UV resistance and long‑term outdoor reliability, but it burns when exposed to fire and is unsuitable for indoor fire‑rated spaces. GYXTW is the most compact and lowest‑cost option, ideal for low‑core‑count (≤24 cores) aerial or light‑duty duct installations. However, it also lacks flame retardancy and its crush resistance is limited - not recommended for direct burial or harsh mechanical environments.
GYTA Optical Cable - Installation Instructions
Minimum bending radius：During installation: 20 × cable diameter; after installation: 10 × cable diameter.
Tensile load：Maximum allowable pulling force: 1500-3000 N (depending on core count). Use a proper pulling grip to avoid stress on the fibers.
Crushing resistance：Short-term: 3000 N/100 mm; long-term: 1000 N/100 mm. Do not crush or impact the cable sharply.
Installation methods：Suitable for duct, aerial (with messenger wire), and direct burial (if additional protection is applied). Avoid sharp edges and excessive twisting.
Temperature range：Installation: -20°C to +60°C; operation: -40°C to +70°C.
Handling notes：Do not exceed the rated pulling force. Use lubricant for long duct runs. Keep the cable end sealed against moisture during and after installation.
Download YRTFIBER Product Catalog
Factory Real Shot
Advanced In‑House Testing & Quality Assurance
Every production stage is validated: fiber attenuation (OTDR), loose tube dimensional check, aluminum tape lap‑welding integrity, and PE sheath spark test. A fully equipped mechanical lab performs tensile, crush, impact, and water‑blocking tests per IEC/TIA standards — no third‑party bottleneck.
High‑Volume Production with Automated Lines
Dedicated SZ stranding lines, dual‑parallel sheathing extruders, and automatic take‑up systems run 24/7. Daily output exceeds 150 km of GYTA cable (up to 144 fibers). Real‑time line monitoring and data logging ensure consistent quality across every kilometer.
Robust Raw Material Supply Chain
On‑site silos for PE compounds, climate‑controlled storage for aluminum tapes and water‑blocking yarns, and just‑in‑time replenishment from qualified suppliers. No material substitution without customer approval — full lot traceability from fiber preform to final drum.
Fully Integrated Optical Cable Manufacturing Facility
End‑to‑end process chain under one roof: fiber coloring, secondary coating, loose tube stranding, dual‑layer sheath extrusion. Segregated clean zones (coloring, extrusion, stranding, armoring, testing) ensure zero cross‑contamination and full traceability.
Frequently Asked Questions & Quick Inquiry
GYTA armored Fiber Optic Cable FAQ
1. What is GYTA optical cable? What do the letters in the model mean?
GYTA is the standard model name for layered stranded metal-reinforced core aluminum strip armored outdoor optical cables. Where:
G stands for outdoor optical cable for communication;
Y stands for polyethylene sheath;
T stands for Filled structure;
A stands for Aluminum-Polyethylene bonded sheath (i.e., aluminum strip armor layer). The entire optical cable consists of a central metal-reinforced steel wire, loose sleeves filled with waterproof paste, longitudinally wrapped plastic-coated aluminum strips (APL), and an outer polyethylene sheath, offering excellent waterproof and moisture-proof performance and moderate mechanical strength. This structure makes it especially suitable for pipeline laying and overhead installations, and is often referred to in the industry as "pipeline optical cable."
2. What are the core differences between GYTA and GYTS and GYTA53?
GYTA, GYTS, and GYTA53 are the three most commonly used layered outdoor optical cables, mainly distinguished by armor materials and protection levels. GYTS uses steel belt armor, while GYTA uses aluminum belt armor. Aluminum strips are about 30% lighter than steel strips, offer better moisture and rust resistance, and have some resistance to electromagnetic interference, thus extending their lifespan in pipeline threading scenarios; GYTS with steel strip armor has higher lateral compression strength and is more suitable for overhead installation.
The GYTA53 can be seen as GYTA's "enhanced protective version." In addition to GYTA's original aluminum strip sheath, it adds a layer of wrinkled steel strip armor and a polyethylene outer sheath, forming a three-layer composite structure of "inner sheath + steel band armor + outer sheath." This makes GYTA53's tensile strength and compressive force significantly higher than ordinary GYTA, allowing it to be buried directly underground, resist rodent bites, and mechanical damage, but also increase cost and weight. Simply put: for general pipeline and overhead scenarios, GYTA offers the best cost-performance ratio; For direct burial or construction in areas with frequent animal activity or wilderness, GYTA53 must be used.
3. What should be noted when installing and laying GYTA optical cables?
The construction quality of GYTA optical cables directly affects their long-term service life. The following are the most critical points in the project:
Bending radius control: During construction (i.e., in dynamic scenarios), the bending radius should not be less than 20 times the cable diameter; After construction is completed (in static scenarios), the cable diameter should not be less than 10 times the diameter.
Traction force limitation: The tensile strength of GYTA optical cables is limited. The traction force in the conduit must be controlled within the rated range. Generally, the tension strength of optical cables is 100-300kg. Excessive traction can cause fiber deformation or even breakage.
Burial depth requirements: The single pulling length during pipeline laying should not exceed 1000 meters; For direct burial, the depth under the carriageway must reach at least 0.8 meters; the joint box must ensure IP68 protection and be filled with desiccant to prevent condensation.
Lightning protection: GYTA contains a metal reinforced core and aluminum strip armor. When introducing indoors, grounding protection must be ensured; otherwise, lightning may enter and damage the equipment.
Water blocking treatment: GYTA uses a full-section water-blocking design, but if the outer sheath is damaged and water enters, the damaged section of the cable should be immediately cut off and re-spliced.
4. What are the common specifications of GYTA optical cables? What is the approximate price range?
GYTA optical cables have a wide range of cores, expanding from 2 cores to 144 cores. Common fiber types include G.652D single-mode and multi-mode fibers, with waterproof grease filling inside loose sleeves and water-blocking yarns or tapes between cable core gaps to achieve full-cross-section water resistance.
In terms of price, there are significant differences depending on the number of cores and the batch size. Taking the retail market as an example, 288-core GYTA optical cable costs about 16.53 yuan per meter. In bulk purchases by operators, prices are significantly lower: in China Tower's recent centralized procurement project, the tax-excluded benchmark price for GYTA G.652D single-mode 12-core optical cable is 2.028 yuan per pi length kilometer (about 2.03 yuan/meter), 72 cores about 5.486 yuan per pi length kilometer (about 5.49 yuan/meter), and 144 cores about 10.426 yuan per pi length kilometer (about 10.43 yuan/meter). There are significant price differences among manufacturers, purchase volumes, and chip counts, so it is recommended to consider project needs and budget comprehensively when selecting models.
5. What scenarios are GYTA optical cables suitable for? Can indoor wiring be used?
GYTA optical cables are designed for outdoor pipelines and overhead installation. Its aluminum strip armor and polyethylene outer sheath offer excellent moisture resistance, UV resistance, and weather resistance, making them widely used in long-distance communication trunk lines, urban pipeline networks, highway electromechanical communication systems, and overhead connections between buildings.
However, GYTA optical cables are not suitable for direct indoor wiring. There are three reasons: first, the metal armor layer and metal reinforcement core pose lightning risk after being introduced indoors; Second, waterproof grease inside loose sleeves may leak due to gravity after being vertically deployed for several years, polluting the environment; Third, the GYTA outer sheath is quite hard, making installation inconvenient in confined indoor spaces. If indoor installation is required, GYTZA flame-retardant optical cables or flame-retardant sheathed cables should be used at the incoming section, with strict grounding protection.
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