Only three dimensions: RD 18, RD 21, RD 32
Only suitable for ducts with a clean and smooth surface without seams.
Internal tests demonstrate that the access doors remain oil-tight with an overpressure of 10'000 Pa. Since the conditions on the construction site are never ideal, and because the quality of the ducts does vary, no definitive guarantees can be given regarding the tightness, especially in the long term.
Max. operating temperature: ≈ + 80°C.
Duct Wall Thicknesses
RD access doors with NBR gasket: S1 = max. 5 mm
For thicker duct wall thickness special access door versions with longer bolts can be ordered.