Pre-insulated pipe FLEXSTAR UNO 25x70: Pex-a pipe 25x2.3mm, d70mm, 6 bar, 80°C, single, thermal insulation with PUR foam, with corrugated LLDPE outer jacket 1098219

Pre-insulated pipe for efficient heating installations

The FLEXSTAR UNO pre-insulated pipe is a modern solution for heating systems, particularly heat pumps and district heating networks. Made of flexible cross-linked polyethylene (PEX-a) with an EVOH anti-diffusion barrier, it ensures reliability and long-lasting protection against corrosion. Polyurethane (PUR) insulation minimizes heat loss, while the corrugated outer jacket made of LLDPE polyethylene protects against mechanical damage and weathering.

Construction and properties

The FLEXSTAR UNO system is characterized by a composite construction in which the conduit pipe and PUR insulation form an inseparable unit. This ensures longitudinal watertightness in accordance with DIN EN 15632-2, eliminating the risk of moisture penetration and extending the life of the installation. The pipe is resistant to temperatures up to 80°C (continuous operation) and 95°C (temporary operation) and a working pressure of PN6 (6 bar). Thanks to its flexibility, it allows installation in tight spaces without the need for additional elbows.

Advantages for installers and users

• Fast installation: The flexible design and no need for welding significantly speed up the installation process.
• Low heat loss: PUR insulation with a thermal conductivity coefficient of 0.153 W/(m·K) minimizes energy losses, reducing operating costs.
• Durability and reliability: The composite construction and EVOH anti-diffusion barrier provide long-lasting protection against corrosion and damage.
• Versatility: Ideal for use in heat pumps, district heating networks and supplying heat to buildings.
• Easy storage and transport: The pipe is available cut to length, making it easier to transport and adapt to individual project needs.
• Small bending radius: Allows pipes to be laid in tight spaces without the need for elbows.

The FLEXSTAR UNO pipe is an investment in thermal comfort and energy savings, confirmed by Swiss quality and compliance with DIN EN 15632-2 and DIN 4726 standards. It is an ideal solution for both new installations and the modernization of existing heating systems.