K‑FLEX PU is a rigid polyurethane (PUR) insulation system designed for industrial, mechanical and HVAC applications where high thermal efficiency, dimensional stability and mechanical strength are essential. Manufactured from closed‑cell PUR foam, the system delivers low thermal conductivity and long‑term performance across a wide range of services.
Why Choose K‑FLEX PU?
- Rigid closed‑cell PUR insulation for high compressive strength and durability.
- Low thermal conductivity: λ40°C ≈ 0.0349 W/m·K ensures excellent energy performance.
- Service temperature up to +110°C, suitable for chilled water, hot water, and industrial process lines.
- Euroclass E fire performance for standard building and mechanical use.
- Compatible with K‑FLEX PU accessories including elbows and aluminium endcapping systems.
Compare K‑FLEX Insulation Ranges
| Feature | K‑FLEX PU | K‑FLEX ST | K‑FLEX K‑Rock |
|---|---|---|---|
| Material | Rigid Polyurethane (PUR) | Elastomeric Foam | Stone Wool (Mineral Fibre) |
| Structure | Rigid, pre‑formed sections | Flexible tube & sheet | Rigid sections with foil facing |
| Max Temperature | +110°C | +105°C | +250°C |
| Thermal Conductivity | 0.0349 W/m·K | 0.036–0.040 W/m·K | 0.035–0.040 W/m·K |
| Fire Rating | Euroclass E | Euroclass BL‑s1, d0 | Euroclass A1 (non‑combustible) |
| Best For | Industrial piping, tanks, vessels, OEM equipment | HVAC, refrigeration, flexible installations | High‑temperature applications, fire‑rated systems |
| Installation | Rigid sections with longitudinal slit | Self‑seal or standard tube, easy to fit | Rigid sections, requires mechanical fixing |
Applications
- HVAC mechanical services pipelines
- Industrial and process piping
- Equipment, vessels, and surface insulation
- OEM enclosures requiring rigid PUR insulation
Available Products in This Range
- K‑FLEX PU Pipe Sections — 1 m pre‑formed insulation tubes in multiple bore and wall thicknesses.
- K‑FLEX PU Elbows — factory‑formed rigid elbows for directional pipe changes.
- K‑FLEX PU Sheets — rigid PUR boards for fabrications, equipment and flat‑surface insulation.
- K‑FLEX Aluminium Endcapping Rolls — protective mechanical finishing for insulated terminations.
Together, these components create a complete, high‑performance PUR insulation system suitable for industrial, mechanical and HVAC installations.
