Installing an inline back draugt shutter between ventilation ducts prevents backflow of ventilation air. In addition, air from outside will also not be able to enter the duct. The two non-return valve blades will open or close by means of the air pressure in the spiral duct. This check valve is suitable for a 160 mm diameter duct.
Material
The back draugt shutter is manufactured to the highest standards. They are galvanised (Z275) according to the sendzimir process, which makes them durable in use and guarantees a long service life.
Air tightness class
The spiral duct check valve meets the strict requirements for airtightness class D (ATC 2), according to standard EN12237.
| Brand | Econox |
| Category | Spiral pipe check valve without rubber seal |
| GTIN | 8719544105486 |
| Manufacturer's item number | 75100004 |
| Article number | 75100004 |
| Diameter | 160 |
| Connection diameter | 160 mm |
| Insulated | No |
| Internally fitted with rubber | No |
| Length | 81 mm |
| Airtightness class | D (according to EN12237) |
| Material | Steel |
| Surface protection | Yes, Sendzimir galvanized |
| Mode of production | Seam welded |
| Safe implementation | No |
| Type of connection | Side End |
Item number: 65113485
