Access door RD 42 - AL

Reliable inspection opening for precise maintenance in air duct installation

The robust aluminium access door has been specially developed for rectangular, uninsulated air duct systems. Its sturdy double-panel construction with a PE seal ensures a seamless fit against the duct wall and complies with airtightness class D in accordance with DIN EN 1507. Thanks to ergonomic POM twist handles, the inspection opening can be operated quickly, safely and without tools. This is guaranteed even with frequent maintenance intervals. The low installation height of approx. 35 mm is ideal where there is limited space between the duct and the ceiling.

Regular inspections of rectangular air ducts are essential in building services engineering practice. Cramped conditions, unstable sheet metal walls or inadequate sealing often make work difficult for fitters and service teams. This is precisely where the RD 42 - AL access door comes into its own, ensuring safe, airtight and sustainable access to ventilation systems.

The access door is technically impressive. It is made from sturdy extruded aluminium and designed for operating temperatures of up to +70 °C. In combination with the tried-and-tested PE foam seal, it ensures a clean, airtight fit. This is a key advantage over simple inspection systems, as these often require readjustment.

Technical highlights

• Application: Rectangular air ducts
• Material: Aluminium
• Seal: Polyethylene foam (PE)
• Seal colour: white
• Cut-out: 400 × 200 mm
• Temperature range: -70 °C to +70 °C
• Max. pressure load: 2,500 Pa
• Installation height: approx. 35 mm
• Rotary handle material: polyoxymethylene copolymer
• Clamping force of the rotary handles: 1,000 – 1,500 Nm
• Rotary handle: M8, M10 or M12

Key features

• Airtightness class D
• Robust aluminium construction
• Quick, tool-free operation
• High clamping force of the rotary handles
• Durably reliable PE seal
• Low installation height for confined spaces

Additional features

• Reliable quality with tightness class D in accordance with standards reduces complaints and follow-up costs.
• Durable metal components instead of thin, deformable sheet metal parts result in a lower spare parts rate.
• Widely compatible with standard rectangular air ducts.
• Quick access to the interior of the duct for cleaning, hygiene inspections and fault diagnosis.
• Robust PE seal retains its shape and guarantees consistently clean opening and closing cycles.
• High airtightness prevents leaks even after repeated use.

Installation

• Tool-free installation and operation ensures quick installation and a secure fit.
• Sturdy, pressed covers prevent deformation even with thin duct walls.
• Ergonomic twist handles without protruding screws are ideal for confined installation spaces.

Why is this access panel right for you?

The access door offers greater stability, easier handling and reliable sealing than many standard solutions on the market. The robust aluminium construction and the clamping force of the twist handles ensure permanently sealed inspections. This is ideal for professional plant engineers, service teams and building services engineers.

Typical application scenarios

• Maintenance and cleaning work in HVAC systems
• Hygiene inspections in accordance with VDI 6022
• Inspection access points in kitchen exhaust air systems (with a suitable seal version)
• Inspection openings where there are changes in direction or cross-section
• Service access points for hard-to-reach duct sections