Description
💡 Engineer's Quick Pick: GYTA or GYTS?
- Select GYTS (Steel) if you need high crush resistance or anti-rodent protection.
- Select GYTA (Aluminum) if you are installing in high-humidity ducts and need superior moisture blocking.
Key Benefits
- Aluminum moisture barrier: APL armor blocks water ingress and resists corrosion in wet ducts.
- Lighter build: easier handling and faster lashing than steel-armored cables.
- Strong backbone: central phosphated steel wire controls tensile and thermal strain.
- Full flooding: gel in tubes plus 100% core filling for longitudinal water blocking.
- Broad counts and optics: 2–144F, OS2 G.652D standard; G.657A1/A2 and MM options on request.
Product Overview
GYTA is a stranded loose-tube outdoor cable that replaces corrugated steel tape with aluminum polyethylene laminate (APL). Color-coded fibers sit in gel-filled PBT tubes, stranded around a central steel strength member. The armored core is wrapped with APL and sheathed with black PE. The result is a duct-optimized, lightweight cable that provides an excellent moisture barrier, stable tensile performance, and reliable operation across wide temperature ranges.
Typical Applications
- Long-haul and metro duct systems in humid/coastal regions
- Lash-to-messenger aerial distribution (non-self-supporting)
- Feeder rings for FTTH/FTTx, campus, utility, and municipal networks
- Routes where weight reduction and moisture protection are priorities
Construction (center outward)
- Central strength member: phosphated steel wire (PE-sheathed on smaller counts)
- Loose tubes (PBT) with thixotropic gel; color-coded fibers
- Flooded cable core (100% filled)
- Aluminum Polyethylene Laminate (APL) moisture-barrier armor
- Outer sheath: UV-resistant black PE; ripcord under jacket
Specifications
A) Construction & Materials
| Item | Spec | Notes |
|---|---|---|
| Fiber count | 2–144 cores | OS2 standard; MM on request |
| Fiber type | ITU-T G.652D; G.657A1/A2, OM2/OM3/OM4 optional | Select per bend budget |
| Loose tubes | PBT, gel-filled | Color-coded |
| Central strength member | Phosphated steel wire | Tensile and temperature stability |
| Armoring | APL (aluminum polyethylene laminate) | Moisture barrier; lightweight |
| Water blocking | Tube gel + core flooding (100% filled) | Longitudinal protection |
| Outer jacket | PE, UV-resistant, black | LSZH optional for transitions |
| Marking | Meter marks + print legend | QA traceability |
B) Optical (typical, OS2)
| Parameter | Spec |
|---|---|
| Attenuation | ≤0.35 dB/km @1310 nm; ≤0.21 dB/km @1550 nm |
| Chromatic dispersion | ≤18 ps/(nm·km) @1310 nm; ≤22 @1550 nm |
| PMD (cabled, design) | ≤0.20 ps/√km |
C) Mechanical & Environmental
| Parameter | Spec | Notes |
|---|---|---|
| Tensile strength | 1500 N (short-term) / 600 N (long-term) | Duct and lashing pulls |
| Crush resistance | 1000 N/100 mm | APL layer spreads load |
| Minimum bend radius | Install ≥20×OD; Static ≥10×OD | Use build-specific OD |
| Temperature | Storage/operation −40 to +70 °C; Install −20 to +60 °C | Outdoor PE |
| UV/corrosion | UV-resistant jacket; APL resists corrosion | Humid/coastal routes |
D) Dimensions & Weight (typical ranges by fiber count)
| Fiber count | Approx. OD (mm) | Approx. weight (kg/km) | Tubes × fibers |
|---|---|---|---|
| 2–12F | 9.0–10.0 | 80–120 | 2–4×6F or 6×2F |
| 24–48F | 10.0–12.0 | 110–160 | 4–8×6F |
| 72–96F | 12.0–14.0 | 150–210 | 6–8×12F |
| 144F | 15.0–17.0 | 200–250 | 12×12F |
Note: Lock final OD and weight to your drawing/BOM before publishing. Values vary with tube lay-up and sheath thickness.
E) Standards & Compliance
- ITU-T G.652D; optional G.657A1/A2, OM2/3/4
- IEC 60794-1/-5 mechanical and environmental methods
- RoHS/REACH materials; CPR class available on request (EU tenders)
Installation & Handling
- Duct: use approved pulling eyes/swivels and compatible lubricant; respect 20×OD bend during pulls.
- Aerial (lashed): follow messenger tension/span rules; APL armor is not a self-supporting messenger.
- Sealing: close handholes and duct ends; flooding protects longitudinally but does not replace proper sealing.
- Bonding/earthing: where required by local code, bond/earth the APL armor.
- Storage: keep drums upright; observe minimum flange diameters to maintain bend radius.
Model Selection Snapshot (quick context)
- GYTA — aluminum moisture-barrier armor for ducts and lashing; lightweight in humid routes
- GYTS — corrugated steel tape armor for higher crush and rodent deterrence
- GYTA53/GYTY53 — double-jacket armored for harsh direct burial
- ADSS — all-dielectric self-supporting for aerial spans and high-EMI corridors
Ordering Information (example)
Format: GYTA-[FiberCount]-[FiberType]-[Jacket]-[Install]-[Length]
Example: GYTA-96F-G652D-PE-Duct/Aerial-2000m
Options: fiber type (G.652D/G.657A1/A2/OMx), jacket (PE/LSZH), print legend, customer logo, routine test report; type tests on request.
