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ASS-DC135-SILV
Assa DC135 Silver Door Closer with Guide Rail EN -3
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Rack and Pinion, size 3 closer
In stock
Delivery Information
| Delivery Time Frame | Delivery Information |
| Next Working Day By 1PM | When an order is placed by 3pm for next working day on certain items |
| Standard Delivery | Usually delivered in 2 to 4 working days |
| Delivery Charges | |
| UK Mainland | Prices start at £3.95 for very small items, £6.50 for small, £9.50 for medium and £20 for large/long items |
| Scottish Highlands & Islands, Northern Ireland & Ireland | Prices from £30, please see our delivery page for more info. |
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£122.53
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£102.11
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£45.60
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£38.00
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Description
Assa DC135 Silver Door Closer with Guide Rail EN -3
Choosing the right hardware for your commercial or residential property is a significant decision. The Assa DC135 Silver Door Closer with Guide Rail EN -3 stands out as a sophisticated, reliable solution for those who demand high performance without compromising on aesthetic appeal. This unit is designed to bridge the gap between heavy duty security needs and a sleek, compact profile that fits modern architectural requirements.
Whether you are managing a busy office environment or enhancing the safety of a residential building, this rack and pinion mechanism ensures your entrances function perfectly every single day. By utilising advanced engineering, the system manages the kinetic energy of swinging doors with precision, ensuring they close securely while remaining easy for users to operate.
Understanding the Mechanical Physics of Controlled Closure
At the heart of this hardware lies a sophisticated rack and pinion system. When a person opens a door, the energy is transferred into the internal spring mechanism, which stores that potential energy to be released during the closing phase. This specific model manages the dampening process through hydraulic valves that regulate fluid flow, effectively controlling the speed and force of the movement.
The resistance and tension provided by this unit are calibrated to resist environmental factors like air pressure differentials, which are common in tall buildings or long hallways. Because the unit uses high quality internal seals and precision metal valves, it maintains this tension over years of consistent use. This engineering reduces component wear, preventing the physical flex and structural strain that often lead to premature failure in cheaper, inferior hardware models.
Step by Step Operational Workflow for Users
The user experience is defined by effortless interaction. When you approach a door equipped with this device, you will notice a smooth, consistent resistance that makes the act of opening feel natural and deliberate. Once you pass through the threshold, the device takes over, initiating the closing sequence without requiring manual intervention.
The closing sequence begins with a controlled swing, allowing a person to walk through comfortably. As the door approaches the frame, the latch speed adjustment takes over. This specific adjustment ensures the door engages the strike plate gently, avoiding the loud, disruptive slamming that is often associated with improperly managed door hardware. Finally, the backcheck functionality provides a buffer if a door is pushed open too aggressively, absorbing the force to prevent the door from hitting a wall or causing damage to the frame.
Safety Compliance and Ergonomic Benefits
Safety is the primary driver behind the installation of high quality door hardware. This equipment is fully certified for use on fire and smoke protection doors, providing a crucial barrier that contains potential hazards in an emergency. By ensuring that doors close reliably behind occupants, the system maintains the integrity of fire compartments, which is a mandatory requirement under current safety regulations.
Beyond fire safety, the ergonomic design helps reduce physical fatigue for users of all ages and abilities. A well adjusted closer means that people do not have to struggle against a heavy, uncooperative door. It prevents the need for excessive physical exertion, creating a more accessible environment for employees, clients, and residents alike. In high traffic areas, the reliability of this unit means that maintenance teams are called out far less often, improving the overall operational efficiency of your facility.
Commercial ROI and Long Term Value
Investing in premium hardware represents a long term cost saving strategy for any property manager. While the initial purchase price might be higher than non-branded alternatives, the total cost of ownership is significantly lower due to reduced replacement cycles and minimal maintenance requirements. This model is built to withstand high cycles of operation, meaning it stays functional for years, protecting your investment and your premises.
Furthermore, protecting your doors and door frames from the structural damage caused by slamming represents an indirect but substantial saving. By controlling the door throughout its full arc of motion, the closer prevents cracks in masonry, damage to hinges, and paintwork chips. Over a building lifespan, this equates to thousands of pounds saved in repairs and refurbishments.
Professional Tip: Regularly inspect your door hardware to ensure that the closing and latching speeds remain within recommended parameters. A simple check every six months can significantly extend the lifespan of your installation, ensuring that the internal valves remain clear and the hydraulic fluid operates at optimal viscosity.
Technical Specifications
To ensure this model is compatible with your specific entry points, please review the following technical breakdown. This data highlights the precision engineering required for a proper fit.
| Feature | Specification |
|---|---|
| Closing force | EN size 3 |
| Maximum leaf width | 950 mm |
| Closing speed | Variable between 180 and 15 degrees |
| Latch speed | Variable between 15 and 0 degrees |
| Backcheck functionality | Variable above 75 degrees |
| Maximum opening angle | Approximately 180 degrees |
| Mounting options | Leaf on hinge side or Frame on non-hinge side |
| Corrosion resistance | Grade 4 (240 hours) |
| Product dimensions | 60 x 44 x 233 mm |
Industry Leading Certification and Standards
When selecting security hardware, validation is key. This product is certified in compliance with EN 1154 standards, reflecting its quality and reliability in the field. It holds a CE classification of 4 | 8 | 3 | 1 | 1 | 4, which is an industry recognised benchmark for durability and safety performance. With full CE and UKCA marking, you can be confident that this item meets the strict legal requirements for fire and smoke door safety in commercial buildings.
Additionally, this product features a third party verified Environmental Product Declaration, adhering to ISO 14025 and EN 15804 standards. Choosing this hardware demonstrates a commitment to sustainable construction practices, as it provides transparency regarding the environmental impact of the manufacturing process.
Certification Summary
- Certified in compliance with EN 1154, size 3
- CE classification - 4 | 8 | 3 | 1 | 1 | 4
- CE / UKCA marked
- Suitable for fire and smoke protection doors
- Third-party verified EPD - ISO 14025, EN 15804
- Corrosion resistance - Grade 4 (240 hours)
Not sure if this Door Closer is right for your requirements?
Choosing hardware that fits your specific door weight and width is essential for long term performance. If you are not sure if this door closer is right for your requirements please contact our friendly team today to discuss your requirements. Our experts at Doorfit are ready to provide technical advice and help you select the perfect hardware solution for your project.
Whether you are replacing an outdated unit or outfitting a brand new building, we are here to ensure you get the right product for the job. Our support team can help you verify your door width, assess fire rating needs, and confirm that your mounting requirements align with the technical specifications of the DC135 range.
Specification
| Manufacturer | Assa |
|---|---|
| Finish | Satin Anodised Aluminium |
| Type | Overhead |
| Power sizes | 3 |
| Finish | Silver Anodised Alum |
| CE Certified | Yes |
| Certifire Approved | Yes |
| Application | Universal |
| Arm Assembly | Slide Arm |
| Closing Speed | Variable |
| Latching Action | Yes |
| Stand Open | No |
| Back Check | Yes |
| Delayed Action | No |
