GYTZS Outdoor Stranded Loose Tube Steel Tape Armored LSZH Flame Retardant Duct Underground Fiber Optic Cable

Product Overview:

GYTZS is an outdoor stranded loose tube fiber optic cable with steel tape armored and LSZH (Low Smoke Zero Halogen) flame-retardant sheath, specially designed for duct and underground direct buried installation. It integrates excellent mechanical protection, full water blocking, flame retardancy, and stable long-distance transmission performance, widely used in harsh outdoor and high fire-safety environments.

GYTZS Cable Structure:

• Optical Fiber: Single-mode fibers (G.652D, G.657 etc.) or multi-mode fibers, coating diameter 250μm

• Loose Tubes: Fibers placed in PBT loose tubes filled with waterproof filling compound to control fiber excess length and resist micro-bending loss.

• Cable Core Stranding: Loose tubes stranded around a central strength member (CSM) (generally steel or fiberglass rod) with SZ stranding.

• Water Blocking: Water blocking yarns and filling compounds applied in the core to ensure full longitudinal water resistance.

• Armoring: Steel tape armored longitudinally applied for high crush resistance and rodent protection.

• Outer Sheath: LSZH flame-retardant sheath, low smoke, non-toxic, halogen-free when burning.

GYTZS Fiber Cable

GYTZS Cable Cross Section

Features of GYTZS Optical Fiber Cable:

• Excellent crush resistance, impact resistance and tensile performance due to steel tape armor.

• Full sectional water blocking structure ensures outstanding moisture resistance.

• LSZH flame retardant: low smoke, non-toxic, halogen-free, suitable for high fire safety requirements.

• Wide operating temperature range: -40°C ~ +70°C.

• Stable transmission performance, low insertion loss, suitable for long-haul and access networks.

• Good rodent resistance and environmental stress cracking resistance.

• Complies with IEC, YD/T and other international standards.

Applications:

1. Main Laying Methods

• Duct installation in urban pipelines, underground utility tunnels.

• Direct buried installation in outdoor areas, suburbs, green belts.

2. Typical Application Scenarios

• Metropolitan area networks (MAN), backbone transmission lines, access networks.

• Industrial areas such as power plants, petrochemical plants, mines.

• Transportation infrastructure: subways, tunnels, railway communication systems.

• Places requiring high flame retardancy, low smoke and environmental protection.

FAQs:

Q1: What are the advantages of steel tape armor in GYTZS cable?

Resists external compression and impact; Prevents rodent bites and mechanical damage; Improves mechanical strength for underground laying; Acts as a physical barrier against moisture and soil corrosion

Q2: Why does GYTZS use LSZH sheath?

Low smoke, non-toxic, halogen-free during combustion; High flame retardancy; Reduces harm to people and equipment in confined spaces; Meets strict fire safety standards for public and industrial projects

Q3：What is the difference between GYTZS and GYTS?

GYTZS: Steel tape armored + LSZH flame-retardant sheath

GYTS: Steel tape armored + normal PE sheath

GYTZS is for high fire-safety areas; GYTS is for general outdoor use.

Q4: What is the recommended bending radius?

During installation: ≥ 20 × cable diameter; In operation: ≥ 15 × cable diameter