Radius high-performance low friction Low Smoke Zero Halogen (LSZH) sub-duct provides excellent cable protection and management for low smoke and fire risk areas inside buildings and tunnels.
Engineered for ease of installation and durability, low friction duct allows fast, safe
and efficient network construction, maintenance and upgrade.
Radius Fire Retardant sub-ducts are designed for cable blowing & pulling and are extruded from LSZH-V2 material and feature a high-performance low friction, solid co-extruded inner layer made from an inert polymeric compound.
Robust and flexible, Radius LSZH sub-ducts offer high performance in complex installations (eg. many bends & gradients).
Our sub-ducts are available with ribbed or smooth inner bore according to your preference and can be supplied pre-roped or pre-cabled.
Supplied in continuous lengths on single-way drums or multi-way drums to increase ease of installation and minimise cost.
In addition, we offer a comprehensive range of fittings and accessories including bends, connectors, spacers, seals and access chambers.
What is Low Friction coating?
A solid layer of lubricant is evenly distributed on the inner wall by coextrusion as part of the manufacturing process, providing a permanent low friction and low static surface which lasts for the life of the duct.
Low friction values allow quicker installation and optimal blowing distances. Radius microduct offers superior blowing performance in this market.
Low Friction Matters
Fast cable installation into ducting is key for cost effective, low disruption network build. Cable blowing is the method of choice for longer routes whereby cables are propulsed into the ducting using compressed air.
The blowing distance achieved is directly related to a number of factors including : cable to duct area fill ratio (we recommend 50 to 60% ideally but no more than 70%); weight of cable; pressure used, route difficulty (bends and gradients) and last but not least the Coefficient of Friction (CoF) from the microduct inner lining.
The contribution of the microduct inner lining to achieving speed of installation and longer blowing distances should not be underestimated. A quality lining should have the right combination of low CoF and low static for optimum results and for that reason, not all linings are created equal.
At Radius, we have spent years of careful formulation and testing to achieve our class leading low friction and low static inner coatings. Our low friction compounds are home crafted, no ready-made mixes there!
And the results speak for themselves in the field where for the last 30 years we have helped our customers achieve proven consistent long install lengths thanks to our high-performance low friction coating.
Understanding CPR Fire Classification
The Construction Products Regulation (CPR) is a key legislation for fire safety in buildings designed to help save lives and protect buildings. This regulation requires that cables come with a declared fire performance rating. The specifications for this rating fall into four categories:
- Reaction to fire
- Smoke production
- Flaming Droplets
Performance is classified into hierarchical Euroclass levels where B2 and C are those with maximum performance against fire, providing maximum protection to people and equipment. Cables belonging to classes D and E have a more basic level of safety.