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Production » Outdoor cables » Cables for installation in cable ducts, tubes, tunnels » OKLs cable

OKLs cable

Fiber optic cable OKLs with stainless steel central tube for installation in cable ducts.


OKL is designed for installation in tubes, cable ducts, tunnels. OKLs from flame retardant materials is designed for installation according to exclusive standards of fire safety.

  1. Optical fiber
  2. Stainless steel loose tube filled with hydrophobic gel
  3. Protective jacket


Cable core is stainless steel tube. Optical fibers are placed inside a tube. Interstice inside cable core is filled with hydrophobic filler. The outer high density polyethylene jacket is extruded over the core. In case of exclusive standards of fire safety cable jacket is made of flame retardant halogen free (HF) compound. In case the number of fibers exceeds 12 ring marking is used and/or bundling with identification yarns.

On customer’s request cable design can have following options:

  1. Production of «dry» construction (water blocking yarns instead of hydrophobic filler).
  2. Change of the standard color of polymer modules and fibers.


Number of fibers2-2426-3638-4850-96
Nominal overall diameter, mm 5,8 6,2 6,6 9,0
Total mass of cable with polyethylene jacket, kg/km 38 43 48 97
Total mass of cable with flame retardant (HF) jacket (kg/km) 49 55 61 118


Temperature range of operation, С° -60… +70
Temperature range of installation, С° -10… +50
Transport, storage, С° -60… +70
Minimal bending radius not less than 20 diameters
Lifetime 25 years
Guarantee exploitation 2 years after putting in operation, not more than 2,5 years from shipping date
Tensile strength not less than 1,5 kN
Crush strength not less than 8,0 kN/100 mm

Documentation is on request

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