ASSA ABLOY DC840 Concealed Door Closer Cam-Motion EN 1-4 for Fire Doors

Product Overview

The Assa-Abloy DC840 is a concealed, cam-motion door closer designed for flush integration within the door leaf, making it practically invisible during normal operation. It is suitable for single-leaf fire and smoke protection doors up to 1100 mm wide, with an adjustable closing force of EN 1-4. The DC840 complies with DDA/CEN PR 15894 standards, allowing its use in barrier-free buildings and accessible environments.

Its key differentiator is the integrated thermodynamic valves that provide stable closing performance regardless of ambient temperature changes, minimizing the risk of non-compliant closing speed during seasonal shifts. This feature is particularly relevant for projects in public and commercial buildings where regulatory compliance and consistent operation across climate variations are essential, making it highly suited for specification-driven procurement and large building projects.

Key Features

• Concealed installation ? mounts inside the door leaf for fully invisible appearance


• Cam-motion technology ? optimized smooth, controlled closing action


• Adjustable closing force EN 1-4 ? compatible with doors up to 1100 mm width


• Fire and smoke door suitability ? supports certified fire/smoke-protection assemblies


• Thermodynamic valves ? ensure consistent closing performance across temperature fluctuations


• Complies with DDA/CEN PR 15894 ? meets barrier-free building requirements

Technical Specifications

• Mounting Type: Concealed in door leaf


• Closing Force: EN 1-4 (adjustable)


• Maximum Door Width: 1100 mm


• Valve Type: Thermodynamic


• Certified Use: Fire and smoke protection doors


• Compliance: DDA/CEN PR 15894


• Technology: Cam-motion

Applications

Fits application on single-leaf fire and smoke protection doors in public, commercial, and barrier-free buildings. Ideal for accessible building projects, modern offices, healthcare, and educational facilities requiring concealed door hardware and compliance with accessibility regulations.

Packaging & Shipping

Standard export packaging. Unit includes concealed closer mechanism; compatible accessories (such as DC892 sliding arm and mounting plate) are supplied separately if specified in order.