Access door RD 75

Airtight access door for quick access and safe duct inspections

The REVISION RD 75 – galv. is a tried-and-tested steel access door for rectangular, uninsulated air ducts. This access door has been specially developed for long-term use in professional air duct installation. Thanks to the duct wall clamping mechanism, whereby the duct wall is clamped between the inner and outer covers, as well as the integrated PE seal, the access door meets the airtightness requirements of ATC2 in accordance with DIN EN 16798-3. This also ensures reliable access for inspection, maintenance and cleaning work.

In day-to-day operations, operators, service companies and duct installers are frequently faced with the challenge of having to inspect ventilation systems on a regular basis. However, the airtightness of the air duct system must not be permanently compromised. The RD 75 – galv. inspection cover solves this problem thanks to its robust construction from galvanized steel. It also features corrosion-resistant and ergonomic POM twist handles with a maximum clamping force of 2,000 to 3,000 Nm and a durable PE seal. This ensures that the inspection opening remains reliably usable even after many maintenance cycles.

Technical highlights

• Access door made of galvanized steel
• For rectangular, uninsulated air ducts
• Cut-out dimensions (opening): 700 x 500 mm (RD 75)
• Radius: 250 mm
• Installation height: approx. 73 mm
• Duct wall thickness: maximum 5 mm
• Airtightness class: ATC2 in accordance with DIN EN 16798-3 & D in accordance with DIN EN 13779 TÜV Nord
• Approved overpressure and underpressure: up to ≈ 5,000 Pa
• Temperature range: -70°C to +70 °C
• Seal: polyethylene foam
• Seal colour: white
• Rotary handle material: polyoxymethylene copolymer
• Rotary handle: M12

Key features

• Quick access to duct sections for inspection and cleaning
• Reliable sealing thanks to closed-cell, cross-linked polyethylene foam
• Corrosion-resistant and ergonomic rotary handles ensure reliable opening even after prolonged use
• Robust design for daily use on construction sites and in plant operations
• Reduction in leaks and energy losses
• Clean, professional access solution for building services projects

Additional features at a glance

• Cost-effective and durable solution for ventilation projects
• Quick access to relevant maintenance areas
• Facilitates regular inspection and hygiene checks
• Easy integration into rectangular, uninsulated air ducts
• Standardised dimensions for common applications

Installation

• Easy installation in rectangular, uninsulated air ducts
• The duct wall is securely clamped between the inner and outer covers
• No protruding screws in the grip area
• Installation height RD 75 approx. 73 mm
• Ideal for new builds, extensions and retrofitting existing air ducts

Why is this access door suitable for you?

If you are looking for a robust, airtight and easy-to-install access door for rectangular, non-insulated air ducts, the REVISION RD 75 – galv. offers the right solution. This high-quality access door combines a sturdy steel construction with a reliable PE access seal. This provides the ideal conditions for maintenance, inspection and the long-term preservation of value in ventilation systems. For specialist air duct installation companies, this galvanized steel access panel is a cost-effective and practical choice.

Application scenarios

• Ventilation and air conditioning systems in commercial premises
• Office and administrative buildings
• Industrial and production halls
• Public facilities
• Schools, hospitals and municipal buildings
• Maintenance access points in rectangular air duct systems

Note on the scope of delivery

• Inner cover
• Outer cover
• PE seal
• Lock bolts
• Conical springs
• Stop washer
• Ergonomic POM rotary handles

Optionally available: Safety cable including M6 nut for additional safety.

PE seal for reliable sealing in air duct systems

The integrated PE seal consists of a closed-cell, cross-linked polyethylene foam and ensures reliable sealing between the access door and the duct wall. The seal is available in white and features a self-adhesive backing, facilitating simple and clean installation. Furthermore, the material is REACH-compliant and free from substances of very high concern in accordance with current REACH requirements.

The PE seal is designed for a temperature range of -70 °C to +70 °C and can withstand temperatures of up to +80 °C for short periods. This makes it suitable for numerous applications in ventilation and air-conditioning technology.

In terms of resistance to liquids, the PE seal offers limited protection against splashing water. For applications with higher requirements for liquid tightness, the specific operating conditions should be checked and, where necessary, alternative seal variants considered.

All information is provided without guarantee. Technical data, illustrations and prices are subject to change and are not binding. Errors excepted.