Gel-free loose tube stranded all dielectric cable (GYFY).
Manufacturer: Nanjing Wasin Fujikura
Cable Construction
Loose tubes surround a central FRP member and are protected by water-blocking yarn and tape and a polyethylene sheath.
Operating Conditions
- Operating temperature: -40 °C to +70 °C
- Bending radius: static 10 × D; dynamic 20 × D (D is cable diameter)
Technical Specifications
Values and units are based on information published by the manufacturer.
| Fiber count | Nominal diameter （mm） |
Nominal weight (kg/km) |
Max fiber per tube | NO.OF(Tubes +filler) | Allowable tensile load （N） （short term/long term ） |
Allowable crush resistance （N/10cm) (short term/long term ） |
| 2～36 | 10.2 | 85 | 6 | 6 | 1500/600 | 1000/300 |
| 38～72 | 11.1 | 100 | 12 | 6 | 1500/600 | 1000/300 |
| 74～96 | 12.6 | 130 | 12 | 8 | 1500/600 | 1000/300 |
| 98～120 | 14.1 | 162 | 12 | 10 | 1500/600 | 1000/300 |
| 122～144 | 15.9 | 204 | 12 | 12 | 1500/600 | 1000/300 |
| 146～216 | 15.9 | 205 | 12 | 18（2 layers） | 1500/600 | 1000/300 |
| >216 | Available upon customer’s request | |||||
Additional technical details
Fibers sit in high-modulus loose tubes with water-blocking yarns and tape inside and outside. Tubes and fillers are stranded around an FRP central member under an extruded PE sheath. The lightweight all-dielectric design is described as resistant to electromagnetic interference and suitable for electrical or lightning-prone environments. Flexible tubes can be routed in closures; the jacket protects against UV, fungus and abrasion. The manufacturer states a service life over 30 years. The source mentions both gel-free construction and tube filling gel; this inconsistency requires manufacturer confirmation. For long-distance and building communications, duct or aerial installation; −40 to +70 °C; bend radius 10 × diameter static and 20 × dynamic.