ASSA ABLOY DC300 Door Closer Body EN 3-6 Silver for Doors up to 120kg 1400mm

Product Overview

Assa Abloy DC300 is a surface-mounted door closer body designed for professional installation on single or double leaf doors in commercial and institutional environments. Certified to EN 1154, it supports fire-rated and smoke-control door assemblies and suits high-traffic installations requiring adjustable closing force for doors up to 1400 mm wide and 120 kg in weight. Both hinge-side leaf and opposite-side frame mounting are supported, and the closer can be configured for left- or right-handed doors.

The DC300 stands out due to its built-in thermodynamic valves that regulate both closing and latch speed, eliminating the need for seasonal adjustment of the closer's hydraulic behavior. This feature simplifies maintenance planning for facility managers and reduces risk of non-compliance in fluctuating temperature environments. It is particularly recommended for bulk procurement in office buildings, schools, and public sector projects where consistent performance and minimal adjustment calls are important.

Key Features

• Adjustable closing force EN 3-6 ? supports doors weighing up to 120 kg and max. 1400 mm wide


• Thermodynamic valves ? automatic regulation of closing/latching speeds without seasonal recalibration


• EN 1154 certified ? suitable for use on fire-rated and smoke-control doors in compliance-driven projects


• Back-check function ? adjustable wind-resistant opening brake engages from 75° for protection in high-traffic areas


• Mounting flexibility ? can be installed on door leaf (hinge side) or frame (opposite hinge) with 0-14 mm height arm adjustment


• Bidirectional suitability ? works for both left- and right-handed doors without additional parts


• Speed regulation zones ? two independent valves for closing (180°?0°) and latching (15°?0°) phases

Technical Specifications

• Certification: EN 1154


• Closing Force: EN 3-6 (adjustable via valve)


• Maximum Door Width: 1400 mm


• Maximum Door Weight: 120 kg


• Mounting: Hinge side (door leaf) or opposite hinge (frame)


• Maximum Opening Angle: 180° (EN 5 = 125° max)


• Back-check Activation: from 75° (adjustable)


• Height Adjustment of Arm Axis: 0?14 mm


• Thermodynamic Valve: Yes


• Compatible Door Types: Left and Right

Applications

Designed for use on single- or double-leaf interior and exterior doors in commercial buildings, schools, hospitals, and the public sector. Fully compatible with fire-rated and smoke-control doors due to EN 1154 certification. Suitable for barrier-free access and projects requiring minimal seasonal adjustment, including high-usage corridors and institutional facilities.

Packaging & Shipping

Standard export packaging. Unit includes door closer body with mounting fasteners and installation instructions. Arm and assembly accessories purchased separately.