This document provides information on high temperature access doors for air duct systems. It includes specifications for oval access doors in various standard sizes ranging from diameters of 68-1800mm, with material options of galvanized steel, stainless steel, or aluminum. Technical details are given on dimensions, pressure ratings, and temperature resistance up to 400C. Tips are provided on curvature to match ducts and minimum access door widths. Accessories for the access doors like arresting cables and edge protection are also listed.

1. 6.2 ACCESS DOORS circular/oval
6.2
ACCESS DOORS
Oval access doors for rectangular and oval air duct systems
6.2.4 ACCESS DOOR RRD - HT
- For operating temperatures above +70°C
- With ceramic fibre sealing and ferrous locking levers
- Access doors installed as per requirements are air tight against a
maximum air-pressure of 5.000 Pa
- Heat resistant till + 400°C (Melting point of the zinc coating)
ACCESS DOOR RRD 18 HT
Art.-Nr. Material* Incision Installation di- Pipe Ø VPE Weight
mm mensions mm min. - Stand. - max. units kg/unit
630/071 H Galv. steel 180 x 80 130 68 - 71 - 75 1 0,320
630/080 H Galv. steel 180 x 80 130 76 - 80 - 85 1 0,320
630/090 H Galv. steel 180 x 80 130 86 - 90 - 95 1 0,320
630/100 H Galv. steel 180 x 80 130 96 - 100 - 105 1 0,320
630/112 H Galv. steel 180 x 80 130 106 - 112 - 120 1 0,320
630/125 H Galv. steel 180 x 80 130 121 - 125 - 130 1 0,320
630/140 H Galv. steel 180 x 80 130 131 - 140 - 150 1 0,320
630/160 H Galv. steel 180 x 80 130 151 - 160 - 170 1 0,320
ACCESS DOOR RRD 21 HT
Art.-Nr. Material* Incision Installation di- Pipe Ø VPE Weight
mm mensions mm min. - Stand. - max. units kg/unit
631/140 H Galv. steel 200 x 100 150 130 - 140/150 - 155 1 0,360
631/160 H Galv. steel 200 x 100 150 156 - 160/180 - 190 1 0,360
631/200 H Galv. steel 200 x 100 150 191 - 200/224 - 240 1 0,360
631/250 H Galv. steel 200 x 100 150 241 - 250/280 - 300 1 0,360
631/315 H Galv. steel 200 x 100 150 301 - 315/355 - 360 1 0,360
ACCESS DOOR RRD 32 HT
Art.-Nr. Material* Incision Installation di- Pipe Ø VPE Weight
mm mensions mm min. - Stand. - max. units kg/unit
632/280 H Galv. steel 300 x 200 250 260 - 280 - 300 1 1,030
632/315 H Galv. steel 300 x 200 250 301 - 315 - 340 1 1,030
632/355 H Galv. steel 300 x 200 250 341 - 355 - 380 1 1,030
632/400 H Galv. steel 300 x 200 250 381 - 400 - 420 1 1,030
632/450 H Galv. steel 300 x 200 250 421 - 450 - 470 1 1,030
632/500 H Galv. steel 300 x 200 250 471 - 500 - 530 1 1,030
* On request available in stainless steel (Art.-Nr. + E) and aluminium (Art.-Nr. + A)
All Rights Reserved

2. 6.2 ACCESS DOORS circular/oval
6.2
ACCESS DOORS
6.2.4 ACCESS DOORS RRD - HT
ACCESS DOOR RRD 43 HT
Art.-Nr. Material* Incision Installation di- Pipe Ø VPE Weight
mm mensions mm min. - Stand. - max. units kg/unit
633/400 H Galv. steel 400 x 300 350 370 - 400 - 420 1 2,030
633/450 H Galv. steel 400 x 300 350 421 - 450 - 470 1 2,030
633/500 H Galv. steel 400 x 300 350 471 - 500 - 530 1 2,030
633/560 H Galv. steel 400 x 300 350 531 - 560 - 600 1 2,030
633/630 H Galv. steel 400 x 300 350 601 - 630 - 670 1 2,030
633/710 H Galv. steel 400 x 300 350 671 - 710 - 750 1 2,030
633/800 H Galv. steel 400 x 300 350 751 - 800 - 850 1 2,030
633/900 H Galv. steel 400 x 300 350 851 - 900 - 950 1 2,030
ACCESS DOOR RRD 54 HT
Art.-Nr. Material* Incision Installation di- Pipe Ø VPE Weight
mm mensions mm min. - Stand. - max. units kg/unit
634/1560 H Galv. steel 500 x 400 450 0520 -0560 - 600 1 4,000
634/1630 H Galv. steel 500 x 400 450 0601 - 630 - 670 1 4,000
634/1710 H Galv. steel 500 x 400 450 0671 - 710 - 750 1 4,000
634/1800 H Galv. steel 500 x 400 450 0751 - 800 - 850 1 4,000
634/1900 H Galv. steel 500 x 400 450 0851 - 900 - 950 1 4,000
634/1000 H Galv. steel 500 x 400 450 0951 - 1000 - 1060 1 4,000
634/1120 H Galv. steel 500 x 400 450 1061 - 1120 - 1180 1 4,000
634/1250 H Galv. steel 500 x 400 450 1181 - 1250 - 1320 1 4,000
634/1400 H Galv. steel 500 x 400 450 1321 - 1400 - 1500 1 4,000
634/1600 H Galv. steel 500 x 400 450 1501 - 1600 - 1800 1 4,000
* On request available in stainless steel (Art.-Nr. + E) and aluminium (Art.-Nr. + A)
Tips:
- As per DIN 24145 the curvature of the RRD-Access doors is equivalent to the Ø of
the folded spiral-seam pipes
- Minimum width for all RRD-Access doors: Access doors incision + 50 mm
- For Pipes with intermediate dimensions one chooses the pipe access door lid
with the closest standard diameter. A limited variance in the diameter can be easily
accommodated by the thin walled pipes.
6.3.1 ACCESSORIES FOR ACCESS DOOR LID
Art.-Nr. Designation Material VPE Weight kg
All Rights Reserved
/m/unit
656 Arresting cable Steel 10 units 0,240
655 Edge protection Cellular rubber - Elastomer m 0,070