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GYFTY Non-Metallic Non-Armored Fiber Optic Cable – Aramid Yarn, FRP Central Member
Good mechanical and temperature properties
High-strength loose casing, resistant to hydrolysis
Special casing filler plays a key role in protecting optical fibers
Anti-extrusion, good flexibility
Single fiber-reinforced plastic as a central reinforcement
Light weight, small diameter, easy installation
What is GYFTY fiber optic cable
GYFTY (loose tube, non-metallic, gel-filled) fiber optic cable is a fully dielectric cable that places 250 μm optical fibers into high-modulus plastic loose tubes filled with waterproof filler, which are then stranded around a central fiber-reinforced plastic (FRP) non-metallic strength member, and finally sheathed with PE, offering excellent mechanical and temperature properties, light weight, small diameter, and high resistance to electromagnetic interference, making it ideal for overhead and duct installations in power line areas or lightning-prone environments.
GYFTY Non-Metallic Fiber Optic 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 | Tube | Weight(kg/km) | Tensile Strength N | Crush N/100mm | Bending Radius mm |
| GYFTY-2~36F | 2~36 | 6 | 88 | 600/1500 | 300/1000 | 10D/20D |
| GYFTY-38~72F | 38~72 | 6 | 112 | 600/1500 | 300/1000 | 10D/20D |
| GYFTY-74~96F | 74~96 | 8 | 155 | 600/1500 | 300/1000 | 10D/20D |
| GYFTY-98~120F | 98~120 | 10 | 185 | 600/1500 | 300/1000 | 10D/20D |
Product Structure & Composition
Outer Sheath (Outer Jacket)： Made of polyethylene (PE) through extrusion molding, it protects the internal cable cores from mechanical damage, ultraviolet rays, and environmental corrosion, while providing good water resistance and insulation performance.
FBT Loose Tube： A loose tube made of high-modulus plastic (usually PBT, here referred to as FBT), which holds the optical fibers inside and is filled with waterproof fiber paste, providing a buffer space and lateral-pressure protection for the fibers.
Water-Blocking Material：A thixotropic fiber paste filled inside the loose tube that effectively prevents water from penetrating longitudinally along the tube while cushioning micro-bends in the fiber, ensuring long-term transmission stability.
FRP Strength Member： A glass fiber-reinforced plastic rod located at the center of the optical cable, serving as a non-metallic tensile element to withstand the tension during laying and usage and ensure the overall roundness and compactness of the cable.
Fiber： The medium for transmitting optical signals, usually 250μm colored optical fiber, placed inside the loose tube to achieve high-speed, large-capacity data communication.
Water-Blocking Material： Water-blocking grease or water-blocking yarn/powder filled in the gaps of the cable core (between the loose tube and the sheath), further preventing water from migrating longitudinally along the core and enhancing the overall water resistance of the optical cable.
Benefits of GYFTY Non-Metallic Fiber Optic Cable
Superior mechanical and environmental performance
Offers stable operation from -40℃ to +70℃, excellent crush resistance, and good flexibility, ensuring reliable performance under extrusion, bending, and temperature variation.
High-strength loose tube with protective filler
Features a hydrolysis‑resistant PBT loose tube and special thixotropic gel that blocks water, cushions micro‑bends, and effectively protects the optical fibers.
Single FRP central strength member (non‑metallic)
Uses a fiber‑reinforced plastic rod as the only central reinforcement, providing tensile strength while eliminating induced currents and lightning risks.
Lightweight, small diameter, easy installation
Optimized non‑metallic design reduces weight and outer diameter, lowering transport and handling costs, and simplifying duct blowing, overhead lashing, and other field installations.
Engineering Applications GYFTY Non-Metallic Fiber Optic Cable
Special Protection Scenarios
In outdoor or mountainous areas with high requirements for rodent and termite protection, the GYFTY optical cable's chew-resistant characteristics provide long-term reliable physical protection. In coastal industrial areas with high temperature, high humidity, and high salt spray, its all-dielectric properties can also effectively resist corrosion.
Railway and Transit
GYFTY optical cables are commonly used for communications and signaling systems along railways, and their resistance to electromagnetic interference ensures stable signal transmission in environments with strong traction currents.
Petrochemical Sites
Chemical plants, refineries, and other facilities have flammable and explosive risks. The metal-free characteristics of GYFTY optical cables can avoid generating sparks, enhancing intrinsic safety levels.
Fiber to the Home (FTTH) Deployment
In areas prone to frequent lightning or severe electrical interference, GYFTY optical cables can be used as the lead-in section from outdoor distribution boxes to the user side, protecting user equipment from lightning strikes and overvoltage damage.
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：
GYFTY vs GYTA vs GYTS vs GYFTA
| Feature / Dimension | GYFTY (Non-Metallic, No Armor) | GYTA (Aluminum Tape Armor) | GYTS (Steel Tape Armor) | GYFTA (Non-Metallic + Aluminum Tape Armor) |
|---|---|---|---|---|
| Structure Type | Stranded loose tube around FRP (non-metallic) central strength member. Non-metallic construction throughout. | Stranded loose tube around metallic central strength member (steel wire). | Stranded loose tube around metallic central strength member (steel wire). | Stranded loose tube around FRP (non-metallic) central strength member. Aluminum tape armor (APL). |
| Armor / Protection | No metallic armor. Aramid yarn water-blocking layer + PE outer sheath. | Corrugated aluminum tape (APL) longitudinally applied + PE sheath. | Corrugated steel tape (PSP) longitudinally applied + PE sheath. | Corrugated aluminum tape (APL) + PE sheath. All-dielectric aside from aluminum tape. |
| Fiber Core Capacity | 2 – 144 cores (up to 288 cores in some designs) | 2 – 144 cores (up to 432 cores) | 2 – 144 cores (up to 432 cores) | 2 – 144 cores (up to 288 cores) |
| Typical Applications | Aerial, duct. High‑voltage areas, lightning‑prone regions, substations, environments requiring no grounding. | Duct, aerial (with messenger). Long‑haul backbone, metropolitan networks, wet/coastal areas (corrosion‑resistant). | Duct, aerial (with messenger), direct burial. Harsh environments requiring high crush resistance, rodent protection. | Duct, aerial. High‑voltage areas needing better moisture barrier than GYFTY, but with non‑metallic central member. |
| Engineering Pros | Fully dielectric – no grounding required, immune to EMI/lightning, safe near power lines. Lightweight, easy to install. UV‑resistant PE sheath, water‑blocking compound. | Excellent moisture/corrosion resistance (aluminum does not rust). Lighter and more flexible than steel armor. Good for long‑term duct installation. | High crush resistance and mechanical protection. Excellent for rodent/bullet protection in direct burial. Strong moisture barrier with PSP tape. | Combines dielectric central member (no induced current) with aluminum armor for moisture protection. Better corrosion resistance than steel armor. Lighter than GYTS. |
| Engineering Cons | No armor – weaker crush resistance, vulnerable to rodent attack. Not suitable for direct burial or high mechanical stress environments. | Lower crush resistance than steel armor (aluminum is softer). Not ideal for direct burial or rocky terrain. Metallic, requires grounding near power lines. | Heavier and stiffer than GYTA. Steel tape can corrode if sheath damaged. Metallic, requires grounding, may induce current near HV lines. | Aluminum armor has lower crush resistance than steel. Still requires care in rocky direct burial. Cost higher than GYFTY. |
| Cost (Relative) | Low – simple non‑armored construction, most economical for low‑core‑count non‑hazardous aerial/duct installations. | Medium – aluminum tape is cheaper than steel, but metallic construction adds moderate cost. | Medium to high – steel armor increases material and shipping costs, but good value for high‑protection needs. | Medium to high – non‑metallic member plus aluminum armor costs more than GYFTY but less than GYTS for similar protection in sensitive electrical environments. |
| Maintenance Difficulty | Low – lightweight, easy handling, no grounding required. However, lack of armor means higher risk of damage, requiring more frequent inspections. | Low – good corrosion resistance reduces long‑term issues; easier mid‑span access than steel armor. | Moderate – heavier and stiffer, harder to splice mid‑span; must inspect for rust at sheath damage points. | Low to moderate – lighter than GYTS; aluminum corrosion resistance good, but aluminum armor is softer and may dent, requiring careful handling. |
| Grounding Requirement | None – fully dielectric, no induced current. | Required – metallic components can induce current near power lines. | Required – same as GYTA. | Not required for central member, but aluminum tape is metallic and may require grounding in HV environments. |
GYFTY Non-Metallic Fiber Optic Cable Selection Guide
1 : Engineering selection between GYFTY, GYTA, GYTS and GYFTA:
For aerial or duct installation in high-voltage environments, GYFTY is recommended due to its all-dielectric construction, which eliminates the need for grounding and prevents induced current in lightning-prone or power-line adjacent areas. For applications requiring a dielectric cable with better moisture protection than GYFTY but without the weight of steel armor, GYFTA can be an ideal choice. For pipe-laying in wet or coastal areas, GYTA is suitable for its corrosion resistance, lighter weight, and good moisture barrier. For direct burial, rodent protection, or high mechanical stress scenarios, GYTS provides superior crush resistance but its steel armor is heavier and needs extra rust inspection at sheath damage points.
2 : Flame retardancy and UV resistance considerations:
All four cables are primarily designed for outdoor use with UV-resistant PE sheaths and water‑blocking gel for moisture protection, meeting standards like IEC 60794-1 and YD/T 901. They are not flame‑retardant, so they are not suitable for indoor riser/plenum spaces unless a specific LSZH variant (e.g., GYTZS, GYTZA) is specified.
3: Non‑metallic vs. metallic cable applications:
GYFTY and GYFTA offer non‑metallic or partially non‑metallic constructions that reduce electrical risks when installed near live power lines. This makes them suitable for high‑voltage corridors, telecommunication towers, and wind farms where electromagnetic interference is a concern. GYTA and GYTS, with metallic central strength members, are cost‑effective for general outdoor backbone networks but require proper grounding and are not recommended directly on HV transmission towers.
GYFTY Cable Installation Instructions (Short)
Minimum bending radius： Dynamic (during pulling): 20× cable diameter; Static (after installation): 10× cable diameter.
Maximum tensile load： Long‑term: ≤600 N; Short‑term: ≤1500 N. Do not exceed to avoid fiber strain.
Cable pulling： Use a swivel pulling grip to prevent twisting. For duct installation, apply lubricant and avoid sharp edges.
Aerial installation： Suitable for lashed or duct‑mounted aerial use. Maintain proper sag and clearance from power lines.
Storage & handling： Keep cable ends sealed to prevent moisture ingress. Do not step on or crush the cable.
Temperature range： Installation: -10℃ to +60℃; Operation: -40℃ to +70℃.
Download YRTFIBER Product Catalog
Factory Real Shot
1. Factory Optical Cable Production Workshop
The workshop features an integrated production line covering fiber coloring, secondary sheathing, cable stranding, and double‑layer jacket extrusion. It is clearly divided into dedicated zones: fiber coloring area, loose tube extrusion area, cable stranding area, armored jacket area, and testing & packaging area.
2. Delivery Time
Custom orders are scheduled and executed strictly according to the contract. A dedicated person is assigned to follow up on each order and ensure on‑time delivery as agreed.
3. Production Line Stability
Spare extruder heads and dual‑station pay‑off racks guarantee uninterrupted production during specification changes or maintenance. Key consumables (steel tape, PE materials, water‑blocking compounds) are monitored by online automatic alerts that remind operators when stock levels run low.
4. OEM / ODM
Customization is available based on customer drawings or samples, including jacket color, print content, spool size, and packaging method. Neutral packaging (no factory logo), customer brand labeling, and custom film wrapping printing are all supported. For ODM services, engineers coordinate the entire process from structural design and material selection to sample production.
Frequently Asked Questions & Quick Inquiry
GYFTY Non-Metallic Fiber Optic Cable FAQ
1. What makes GYFTY different from armored cables like GYTS or GYTA?
GYFTY is a non-metallic, non-armored fiber optic cable, which uses aramid yarn for tensile strength instead of steel or aluminum armor. This makes it lightweight, dielectric, and resistant to electromagnetic interference (EMI) — ideal near power lines or in areas with electrical noise.
2. Is this cable suitable for aerial or duct installation?
Yes. GYFTY is commonly used in overhead aerial deployments or duct installations where metallic elements are not permitted. It’s not recommended for direct burial without conduit due to its lack of armor.
3. What is the fiber core capacity of this cable?
The GYFTY cable supports 2 to 288 cores of G.652D or G.655 single-mode fibers, providing flexibility for backbone, metro, or access network deployment.
4. Does the all-dielectric design improve safety or performance?
Absolutely. The all-dielectric construction ensures the cable is non-conductive, which greatly improves safety in high-voltage or lightning-prone areas. It also eliminates the risk of ground loops or electrical conduction through the cable.
5. What are the ideal use cases for GYFTY cable?
GYFTY is best used in:
High-voltage corridors or power line routes
Aerial telecom networks
EMI-sensitive environments (e.g., substations)
FTTx and long-span deployments without metal
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