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ASSA ABLOY DC860-40 Concealed Hydraulic Door Closer: Precision Engineering for Integrated Fire Safety
The ASSA ABLOY DC860-40 represents a pinnacle in concealed door control, engineered to deliver robust, reliable performance for single action doors up to 1250mm wide. Certified to EN 1154 CE and BS EN 1154 standards, this hydraulic unit offers fully adjustable power size EN 1-5, variable closing and latching speeds, and essential back-check functionality, making it an indispensable solution for critical fire and smoke door applications where seamless integration and uncompromising safety are paramount.
Quick Answer
The ASSA ABLOY DC860-40 provides discreet, certified hydraulic door control with adjustable EN 1-5 power and crucial fire safety compliance for doors up to 1250mm, ensuring reliable and aesthetic architectural integration.
✓Certified to EN 1154 CE and BS EN 1154 for Fire and Smoke Doors
✓Concealed Hydraulic Design for Architecturally Integrated Door Control
✓Adjustable Power Size EN 1-5 Accommodates Door Widths up to 1250mm
✓Independent Variable Control for Closing Speed, Latching Speed, and Back-Check
✓Non-Handed Mechanism Facilitates Universal Application
✓Robust Aluminium/Steel Construction for Durability
The ASSA ABLOY DC860-40 stands as an exemplary concealed hydraulic door closer, expertly balancing aesthetic discretion with critical safety and operational demands. Its EN 1154 CE certification, adjustable EN 1-5 power, and precise hydraulic controls make it a superior choice for environments requiring robust, fire-compliant door management and a clean, unobtrusive architectural finish.
✓ Who Should Buy
- •Architects and interior designers seeking seamless, invisible door control for premium commercial or institutional projects.
- •Facilities managers and building owners requiring EN 1154 compliant, fire-rated door closers for safety and security.
- •Projects where controlled closing, back-check protection, and adjustable power are critical for diverse door types up to 1250mm.
- •Specifiers prioritizing durability and reliability from a globally recognized brand like ASSA ABLOY.
✕ Who Should Avoid
- •Budget-constrained projects where the premium for concealed aesthetics and advanced features is not justified.
- •Installations where a hold-open function or delayed action is a mandatory requirement (as these are not included in this model).
- •Applications on very light interior doors where the EN 1-5 power range might be excessive without significant adjustment, or where a simpler, less powerful closer would suffice.
Product Overview
The ASSA ABLOY DC860-40 is a meticulously engineered concealed hydraulic door closer designed for high-performance applications where discreet yet powerful door control is required. Suitable for single action doors up to 1250mm in width, this non-handed unit integrates seamlessly into the door or frame, offering a clean aesthetic without compromising functionality. It delivers an adjustable power size ranging from EN 1 to EN 5, providing versatile control for varying door weights and traffic requirements. Critical to its design are the independently adjustable valves for closing speed and latching speed, allowing for precise customization of the door's closing cycle, ensuring secure and controlled operation. An integrated back-check feature protects both the door and surrounding structure from damage caused by forceful opening beyond a 70-85 degree angle. Constructed from durable metal, primarily Aluminium and Steel, and finished in silver, the DC860-40 is not only built for longevity but also boasts full fire rating and compliance with EN 1154 CE and BS EN 1154 standards, making it an essential component for fire and smoke door assemblies. With compact dimensions of L: 290mm, W: 40mm, H: 54mm, it is designed for efficient, invisible installation, and comes with all required hardware.
| Brand | assa-abloy |
| Model Name | N/A |
| Category | Door Closer |
| Closer Type | hydraulic-concealed |
| Series | DC860 |
| Model Year | N/A |
| Country Of Origin | N/A |
| Intended Use | Concealed controlled closing |
| Suitable For | Fire and smoke doors |
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Engineering Analysis
The ASSA ABLOY DC860-40 exemplifies advanced hydraulic engineering applied to discreet door control. At its core, the unit employs a highly stable hydraulic fluid and a precision valving system within its robust aluminium and steel body. This system intelligently manages the kinetic energy of the closing door.
Hydraulic Mechanics and Precision Control: The DC860-40's hydraulic mechanism provides unparalleled control over the door's entire closing arc. The variable closing speed valve precisely regulates the flow of hydraulic fluid, allowing the door to close smoothly and consistently from its maximum opening angle of 120 degrees until approximately 15 degrees from the frame. Following this, the independent latching speed valve takes over, ensuring the door accelerates sufficiently to overcome air pressure and latch securely, preventing incomplete closures which can compromise security and fire integrity. The integrated back-check feature is critical; upon rapid or forceful opening beyond a preset point, the hydraulic resistance increases significantly, cushioning the door's swing and protecting the door, frame, and hinges from impact damage. This multi-stage hydraulic management ensures a controlled, predictable, and safe closing cycle under diverse conditions.
EN 1154 Compliance and Fire Safety: Certification to EN 1154 CE and adherence to BS EN 1154 standards are not merely labels; they are testaments to the DC860-40's rigorous design and performance validation. EN 1154 specifically mandates stringent testing for durability, efficiency, and safety for hydraulically damped door closers. The power size classification of EN 1-5 indicates that this closer has been tested and certified for a range of door widths and weights, with EN 5 being suitable for doors up to 1250mm wide. Crucially, its fire-rated status, in conjunction with EN 1154 compliance, means the DC860-40 maintains its essential closing function even during a fire event, ensuring that fire and smoke doors remain closed and latched, thereby containing fire spread and protecting escape routes. The concealed linkage arm and internal mechanism are engineered to withstand elevated temperatures, preserving the integrity of the door assembly. While a specific cycle test rating is not explicitly provided, the EN 1154 certification intrinsically implies extensive endurance testing, affirming its long-term reliability in high-traffic environments.
Operational Durability and Adjustability: The robust construction using aluminium and steel, coupled with adjustable valves, underscores its operational durability and adaptability. The ability to fine-tune closing and latching speeds post-installation provides facilities managers with granular control, optimizing door performance for specific traffic patterns, environmental factors (e.g., drafts), and accessibility requirements. This inherent adjustability, combined with the non-handed design, simplifies specification and installation across a broad spectrum of architectural applications.
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Engineering Analysis
The ASSA ABLOY DC860-40 exemplifies advanced hydraulic engineering applied to discreet door control. At its core, the unit employs a highly stable hydraulic fluid and a precision valving system within its robust aluminium and steel body. This system intelligently manages the kinetic energy of the closing door.
Hydraulic Mechanics and Precision Control: The DC860-40's hydraulic mechanism provides unparalleled control over the door's entire closing arc. The variable closing speed valve precisely regulates the flow of hydraulic fluid, allowing the door to close smoothly and consistently from its maximum opening angle of 120 degrees until approximately 15 degrees from the frame. Following this, the independent latching speed valve takes over, ensuring the door accelerates sufficiently to overcome air pressure and latch securely, preventing incomplete closures which can compromise security and fire integrity. The integrated back-check feature is critical; upon rapid or forceful opening beyond a preset point, the hydraulic resistance increases significantly, cushioning the door's swing and protecting the door, frame, and hinges from impact damage. This multi-stage hydraulic management ensures a controlled, predictable, and safe closing cycle under diverse conditions.
EN 1154 Compliance and Fire Safety: Certification to EN 1154 CE and adherence to BS EN 1154 standards are not merely labels; they are testaments to the DC860-40's rigorous design and performance validation. EN 1154 specifically mandates stringent testing for durability, efficiency, and safety for hydraulically damped door closers. The power size classification of EN 1-5 indicates that this closer has been tested and certified for a range of door widths and weights, with EN 5 being suitable for doors up to 1250mm wide. Crucially, its fire-rated status, in conjunction with EN 1154 compliance, means the DC860-40 maintains its essential closing function even during a fire event, ensuring that fire and smoke doors remain closed and latched, thereby containing fire spread and protecting escape routes. The concealed linkage arm and internal mechanism are engineered to withstand elevated temperatures, preserving the integrity of the door assembly. While a specific cycle test rating is not explicitly provided, the EN 1154 certification intrinsically implies extensive endurance testing, affirming its long-term reliability in high-traffic environments.
Operational Durability and Adjustability: The robust construction using aluminium and steel, coupled with adjustable valves, underscores its operational durability and adaptability. The ability to fine-tune closing and latching speeds post-installation provides facilities managers with granular control, optimizing door performance for specific traffic patterns, environmental factors (e.g., drafts), and accessibility requirements. This inherent adjustability, combined with the non-handed design, simplifies specification and installation across a broad spectrum of architectural applications.