Access Door RRD with Vitreous Fibers Gasket (GF) and Metal Knobs (up to + 200°C)

  1. Duct wall.
  2. Press formed covers (original METU-Design available in galv. and stainless steel V2A + V4A, alu.).
  3. Vitreous Fibers Gasket GF.
  4. Sealing ring (GF).
  5. Mushroom head bolts.
  6. Steel springs.
  7. Locking nuts prevent the knobs from being totally removed.
  8. Metal knobs.
  9. Retaining cable with M6 bolt and nut (D01V-2001) preventing the loss of the door.

Duct Wall Thicknesses
RD access doors with vitreous fibers GF : S1 = max. 5 mm
For thicker duct wall thickness special access door versions
with longer bolts can be ordered.

Top Required Clearance when Installed
RRD 18: H ≈ 36 mm
RRD 21: H ≈ 40 mm
RRD 32: H ≈ 55 mm
RRD 43: H ≈ 60 mm
RRD 54: H ≈ 70 mm

Steel knobs made of
galvanized steel or stainless steel V2A


GF Gasket:
Binders and adhesives tend to crumble when exposed to temperatures above 200°C. Should that be the case the gaskets must be replaced after each opening of the access door.


List of Products & Prices

Opening Dimensions


RRD opening dimensions
according to the duct-Ø


Installation Instructions

Installation Video

Texts for Tenders


STP Dokuments

Made by METU in Germany