Description
Product overview
GYXTW places all fibers in a single, central loose tube. The tube is gel-filled and stranded with two parallel phosphated steel wires that deliver tensile strength; the core is wrapped longitudinally with steel tape (PSP) before the MDPE outer jacket is applied. This light-armored, compact design balances tensile/crush performance with small OD, making it a cost-effective choice for duct and non-self-supporting aerial routes in moisture-sensitive corridors.
Typical dimensions and weight
12F ≈ 8.0 mm, ~67 kg/km; 24F ≈ 9.0 mm, ~79–103 kg/km depending on build.
Key benefits
- Compact OD, easy pulling: 8–9 mm saves duct space and reduces pulling friction.
- Balanced strength: two parallel phosphated steel wires provide backbone tensile performance.
- Light armored PSP wrap: corrugated steel tape improves crush resistance and moisture defense.
- Full flooding: gel in tube; water-blocking compound in the core for longitudinal water blocking.
- Wide deployment window: duct and non-self-supporting aerial; direct-buried possible per route conditions.
Typical applications
- Access and feeder in FTTH/FTTx and CATV
- Metro rings and campus laterals
- Aerial lash to messenger; conduit routes with tight fill factors GYXTW specification
Construction
- Single PBT loose tube, gel-filled; 12F or 24F layouts (color-coded)
- Water-blocking compound in core
- Corrugated steel tape (PSP) longitudinal armor
- Two parallel phosphated steel wires
- UV-resistant black MDPE outer sheath
Specifications
A) Construction & materials
| Item | Spec | Notes |
|---|---|---|
| Fiber count | 2–24 cores (OS2 G.652D) | Other ITU types on request. 3-20230824002-GYXTW-24 2023.08.… |
| Loose tube | PBT, gel-filled | Central uni-tube. 1-20240403001-GYXTW 2024.4.3 |
| Peripheral armor | Steel tape (PSP) | Longitudinal wrap. 1-20240403001-GYXTW 2024.4.3 |
| Parallel strength members | 2 × phosphated steel wires | Tensile backbone. 1-20240403001-GYXTW 2024.4.3 |
| Water blocking | Tube gel + water-blocking compound | Longitudinal protection. 1-20240403001-GYXTW 2024.4.3 |
| Outer jacket | MDPE, black | UV-resistant. 1-20240403001-GYXTW 2024.4.3 |
| Marking | Meter marks, legend | 1 m interval; accuracy 0~+1%. GYXTW specification |
B) Optical (typical, OS2 G.652D)
| Parameter | Spec |
|---|---|
| Attenuation | ≤0.36 dB/km @1310 nm; ≤0.22 dB/km @1550 nm |
| Mode field diameter | 9.2 ± 0.4 μm @1310 nm; 10.4 ± 0.5 μm @1550 nm |
| Cable cut-off wavelength | ≤1260 nm |
C) Mechanical & environmental
| Parameter | Spec | Notes |
|---|---|---|
| Tensile strength | 1500 N short-term; 600 N long-term | Fiber strain ≤0.6% short-term. |
| Crush resistance | 1000 N/100 mm short-term; 300 N/100 mm long-term | PSP spreads load. |
| Min. bend radius | 20×OD install; 10×OD static | Observe during pulls. |
| Temperature | Operate/Store −40 to +70 °C; Install −20 to +60 °C | Outdoor MDPE. |
D) Dimensions & weight (typical)
| Fiber count | Approx. OD | Approx. weight | Notes |
|---|---|---|---|
| 12F | 8.0 ± 0.5 mm | ~67 kg/km | From 12F build table. |
| 24F | 9.0 ± 0.5 mm | ~79–103 kg/km | Range reflects different sheath/armor layups. |
Lock final OD and weight to your drawing/BOM before publishing; values vary by tube size and sheath thickness.
Color identification
Standard 12-color sequence: Blue, Orange, Green, Brown, Slate/Gray, White, Red, Black, Yellow, Violet, Pink, Aqua; 24F
Installation & handling
- Duct: use rated pulling eyes and lubricant; respect 20×OD dynamic bend radius.
- Aerial lash: lash to messenger; GYXTW is not self-supporting.
- Direct-buried: feasible in benign soils; confirm crush budget and route protection.
- Sealing: flooding provides longitudinal protection but does not replace proper duct/handhole sealing.
Ordering information
Format: GYXTW-[FiberCount]-[FiberType]-[Jacket]-[Install]-[Length]
Example: GYXTW-24F-G652D-PE-Duct/Aerial-2000m
Standard delivery length: 2 km per drum (custom lengths on request). GYXTW specification
FAQs
Q1. What’s the main difference between GYXTW and GYTS?
GYXTW is uni-tube with two parallel steel wires and PSP; GYTS uses stranded multi-tubes with PSP and typically supports higher core counts and crush margins at larger OD. Use GYXTW when compact OD and low mass are priorities.
Q2. Can I use GYXTW for direct burial?
Yes in suitable soils; verify crush and add route protection. The spec lists duct, direct-buried, or aerial lash as installation modes.
Q3. What bend radius should I keep during pulling and after installation?
Install ≥20×OD; static ≥10×OD.
Q4. What are typical attenuation values?
≤0.36 dB/km @1310 nm and ≤0.22 dB/km @1550 nm for OS2 G.652D.
Engineer's Note: GYXTW vs. GYTS?
GYXTW is a "Uni-tube" structure (fibers in one central tube). It is thinner (approx 8mm) and lighter than GYTS. Choose GYXTW for low fiber count (2-24 cores) access networks where budget and duct space are limited.
Product Overview
The GYXTW Outdoor Cable is a central loose tube (Uni-tube) fiber optic cable. It places the fibers into a central loose tube filled with jelly, flanked by two parallel steel wires as strength members, and armored with Corrugated Steel Tape (PSP).
Its unique structure ensures excellent crush resistance while maintaining a small diameter, making it the most cost-effective solution for aerial and duct applications.
Structure Analysis (Uni-tube Design)
- Central Tube: All fibers (up to 24) are housed in one central tube.
- Strength Members: Two parallel steel wires embedded in the sheath provide tensile strength (1500N).
- Armor: PSP Steel Tape for rodent protection and crush resistance.
- Water Blocking: Water-blocking material between the steel tape and loose tube.
Technical Specifications
| Parameter | Value |
| Fiber Count | 2 - 24 Cores (Max) |
| Cable Diameter | 8.0mm - 9.0mm (Highly Compact) |
| Tensile Strength | 1500N (Short Term) / 600N (Long Term) |
| Crush Resistance | 1000N / 100mm |
| Operating Temp | -40°C to +70°C |
