In the Vital Energi PexFlex system, the service pipe is made of polyethylene (PEX) with an EVOH membrane that protects against oxygen diffusion. The system is used for distribution systems in community heating and district heating distribution systems, where there are lower temperature and pressure requirements.
An EVOH membrane located between the outer casing and the PUR insulation foam protects against any diffusion of oxygen and gases.
PexFlex pipes can be operated up to 95°C and have a maximum working pressure of 10 bar depending on size of service pipe.
PexFlex flexible pipe systems are available both as single and twin pipe solutions.
Vital Energi PexFlex pipes are fitted with a diffusion barrier to prevent diffusion of cell gases. Thus the insulating properties do not age over their entire service life.
| Flexible Pipe | Dimension mm | Temp Range Max | Leak Detection System | Operating Pressure | Diffusion Barrier | Series of Insulation Thickness | Lambda Value W/mK |
|---|---|---|---|---|---|---|---|
| PexFlex | 16, 22 & 28 | 0°C to 85°C | No | 10 bar | Yes | 1 | 0.022 |
20, 25, 32, 40, 50, 63, 7, 5, 90 & 110 | 0°C to 85°C | No | 6 bar | Yes | 1 | 0.022 |
