Access door RD 18

Airtight access door for quick access and safe duct inspections

The REVISION RD 18 – galv. is a proven steel access door for rectangular, non-insulated air ducts. This access door was specifically designed for long-term use in professional air duct installation. Thanks to the duct wall clamping mechanism—in which 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. In doing so, the airtightness of the duct system must not be permanently compromised. The RD 18 – galv. access cover solves this problem with its robust construction made of galvanized steel. It also features corrosion-resistant and ergonomic POM twist handles with a maximum clamping force of 1,000 to 1,500 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, non-insulated air ducts
• Cutout dimensions (opening): 180 x 80 mm (RD 32)
• Radius: 40 mm
• Installation height: approx. 37 mm
• Duct wall thickness: maximum 5 mm
• Airtightness class: ATC2 per DIN EN 16798-3 & D per 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 color: white
• Rotary handle material: polyoxymethylene copolymer
• Rotary handle: M8

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
• Reduces 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
• Supports regular inspection and hygiene checks
• Easy integration into rectangular, uninsulated air ducts
• Standardized 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 18: approx. 37 mm
• Ideal for new construction, expansion, and retrofitting of existing air ducts

Why is this access door right for you?

If you’re looking for a robust, airtight, and easy-to-install access door for rectangular, non-insulated air ducts, the REVISION RD 18 – galv. offers the perfect solution. This high-quality access door combines a sturdy steel construction with a reliable PE seal. This provides optimal conditions for maintenance, inspection, and long-term value retention of ventilation systems. For specialized contractors in air duct construction, this galvanized steel access panel is a cost-effective and practical choice.

Application Scenarios

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

Note on the scope of delivery

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

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

PE seal for reliable sealing in air duct systems

The integrated PE seal consists of closed-cell, cross-linked polyethylene foam and ensures a reliable seal between the access door and the duct wall. The seal is available in white and features a self-adhesive backing, which facilitates simple and clean installation. Furthermore, the material is REACH-compliant and free of 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 liquid resistance, the PE seal offers limited protection against splashing water. For applications with increased requirements for liquid tightness, the specific operating conditions should be reviewed, and alternative seal options should be considered if necessary.

All information is provided without warranty. Technical data, illustrations, and prices are subject to change and are non-binding. Errors excepted.