Membrane tube diffusers
PRO₂AIR Pre-PUR 621
PRO₂AIR Pre-PUR 621 is the membrane tube on its own, without adapter body and clamps. It is made of polyurethane (PUR) with an inner diameter of 64.5 mm and a wall thickness of 0.6 mm, and it comes in three lengths. The tube is mounted on an adapter body with clamps.
- Polyurethane (PUR)
- −40 to +90 °C
- DWA-M 115
- Wastewater
Technical specifications
The product's key specifications are briefly summarised below.
| Type | Membrane tube without adapter body |
|---|---|
| Material | Polyurethane (PUR) |
| Colour | Transparent |
| Wall thickness | 0.6 mm |
| Temperature | −40 to +90 °C |
| Manufacturer SKU | 6212702 |
Dimensions and ordering
The table shows the three lengths.
| Inner Ø |
Total length |
Weight |
Article no. |
|---|---|---|---|
| 64.5 | 570 | 0.08 | 62105702702 |
| 64.5 | 820 | 0.11 | 62108202702 |
| 64.5 | 1070 | 0.15 | 62110702702 |
The active (vent) length is 500 mm for 570 mm, 750 mm for 820 mm and 1000 mm for 1070 mm. Weight is per piece.
Frequently asked questions
What is the difference between PUR and EPDM?
According to the manufacturer, the PUR membranes have a wider operating range (normal operation 3–8 Nm³/(h·m Aer.)) and withstand −40 to +90 °C (Pre-PUR 602 only up to +60 °C), while the EPDM membranes have normal operation 6–8 Nm³/(h·m Aer.) and withstand 0 to +85 °C.