August 02, 2026
TECH SUPPLY SHED
August 03, 2026
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TECH SUPPLY SHED
Briton BNT-1120B-SE. The 1120 Series Door Closer Built for Commercial Reliability
Introduction
When it comes to commercial door hardware, reliability isn't optional — it's essential. Whether you're outfitting a storeroom, office corridor, or bathroom block, the door closer you choose needs to perform consistently across thousands of cycles without fail. The Briton BNT-1120B-SE, part of the trusted 1120 Series, is engineered to do exactly that.
In this guide, we break down everything you need to know about the Briton 1120 Series door closer — from its technical specifications and installation options to why it's one of the most specified commercial door closers available in New Zealand.
What Is the Briton BNT-1120B-SE?
The Briton BNT-1120B-SE is a surface mounted, hydraulic door closer designed for commercial interior and exterior wooden and metal doors. It's part of Briton's well-established 1120 Series — a slimline, non-handed closer that suits a wide range of applications including offices, storerooms, and toilet doors.
Priced at $249.00 NZD, it's available in two finishes: Sprayed Silver and Matt Black, making it easy to match your existing door hardware aesthetic.
* Price as of 3rd August 2026
Key Features of the Briton 1120 Series
Universal Non-Handed Design
One of the standout features of the 1120 Series is its fully reversible, non-handed design. This means a single unit can be installed on left- or right-handed doors without modification — simplifying procurement and reducing the risk of ordering errors on large commercial projects.
Adjustable Strength: 2–4 Regular / 1–3 Track Arm
The BNT-1120B-SE offers adjustable closing strength from 2 to 4 (regular arm) or 1 to 3 (track arm), making it suitable for a broad range of door weights and sizes. This flexibility means one product can serve multiple door types across a building.
Hydraulic Closing Control
Door closing is hydraulically controlled with independent adjustment valves for:
- Closing speed — control how quickly the door swings shut
- Latching speed — fine-tune the final pull-to-latch action
- Backcheck — prevent the door from slamming open and damaging walls or hardware
Precision Rack and Pinion Mechanism
The closer body is constructed from pressure die-cast aluminium with a steel rack and pinion mechanism — a combination that delivers smooth, consistent operation and long-term durability.
Tested to 500,000 Cycles
Briton backs the 1120 Series with rigorous testing to 500,000 cycles, meeting the demands of high-traffic commercial environments. This is complemented by a 10-year warranty, giving specifiers and building managers confidence in long-term performance.
Three Installation Options
The Briton BNT-1120B-SE supports three mounting configurations, giving installers maximum flexibility:
1. Regular Arm (Pull Side)
The standard installation — the closer is mounted on the pull side of the door. Ideal for most interior commercial doors.
2. Top Jamb (Push Side)
The closer is mounted to the top of the door frame, with the arm attached to the door face. Useful where door-face mounting isn't practical.
3. Parallel Arm (Push Side)
The arm runs parallel to the door face when open. A popular choice for fire doors and where a cleaner aesthetic is preferred on the push side.
Hold open and track arm versions are also available — contact us for details.
Full Product Specifications
| Specification | Detail |
|---|---|
| Model Number | BNT-1120B-SE |
| Series | Briton 1120 Series |
| Handing | Non-handed (fully reversible) |
| Strength (Regular Arm) | 2 to 4 |
| Strength (Track Arm) | 1 to 3 |
| Arm Type | Regular and Track |
| Regulating Controls | Closing speed, latching speed, backcheck |
| Body Material | Pressure die-cast aluminium |
| Mechanism | Steel rack and pinion |
| Mounting Options | Regular, top jamb, parallel arm |
| Tested Cycles | 500,000 |
| Warranty | 10 years |
| Finishes Available | Sprayed Silver, Matt Black |
| Price (NZD) | $249.00 |
| SKU (Silver) | BNT-1120B-SE |
| SKU (Matt Black) | BNT-1120B-MBV |
Available Finishes
Sprayed Silver
A classic, neutral finish that blends seamlessly with aluminium door frames and standard commercial hardware. SKU: BNT-1120B-SE.
Matt Black
A contemporary matte finish that suits modern commercial interiors and pairs well with black door furniture and hinges. SKU: BNT-1120B-MBV.
Who Is the Briton 1120 Series Suited For?
The BNT-1120B-SE is ideal for:
- Commercial property managers fitting out office suites, storerooms, and amenity blocks
- Builders and contractors needing a reliable, code-compliant closer for interior and exterior doors
- Architects and specifiers requiring a product with documented cycle testing and a 10-year warranty
- Facilities managers looking to standardise door hardware across a building
Its non-handed design and three installation options make it a go-to choice for projects where multiple door configurations are involved.
Why Choose Briton?
Briton is one of the most recognised names in commercial door hardware globally, with a product range trusted by architects, contractors, and facilities managers for decades. The 1120 Series reflects Briton's commitment to combining practical engineering with long-term reliability — backed by independent cycle testing and a comprehensive warranty.
For more information on Briton's full range of door closers and their compliance with international standards, visit the
Shop Door Closers at Tech Supply Shed
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Final Verdict
The Briton BNT-1120B-SE is a well-engineered, commercially proven door closer that ticks all the boxes: non-handed versatility, hydraulic precision, three installation modes, and a 10-year warranty. At $249.00 NZD, it represents strong value for commercial applications where reliability and longevity matter.
Whether you're a contractor, specifier, or facilities manager, the 1120 Series is a product you can confidently specify and install.
