Technical Selection - Louver Damper ND-J
2.3.2. Louver Damper, gastight design ND-J
Louver damper LD-J and ND-J will be used for controlling air flow and shutting off air ducts.
Data
| Nominal dimensions (W/H) | see table |
| Max. temperature | 90°C |
| Adm. leakage rate damper housing DIN 25 496 | <10 l/(h·m2) at 20°C and Δp = 2 000 Pa |
| Adm. leakage rate damper blades (lamellas) | class 4 acc. to DIN EN 1751 |
| Frame | Stainless steel 2 mm by means of a screwed construction |
| Actuator | Manual, eletrical, or pneumatic |
Nominal dimensions in mm
| B 1 | 400 | 500 | 600 | 700 | 800 | 900 | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 | --- |
| H 1 | 150 | 300 | 450 | 600 | 750 | 900 | 1050 | 1200 | 1350 | 1500 | 1650 | 1800 | 1950 |
1 All combinations of W and H dimensions possible, other dimensions also possible
Features
- The damper is designed to operate without any failure at an operating pressure of 1.1 time the admissible operating pressure
- Warp-resistant hollow body lamellas made of aluminum, 150 mm
- Lamellas equipped with changeable silicon rubber profile
- Counterrotating lamellas by means of external positioned rod. parallel rotating lamellas available on request
- Electrical-, pneumatic-, and manual actuator available
- Maintenance-free operation