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MK1 Door Selector
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Not suitable for fire doors
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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£53.26
Incl. VAT
£44.38
Excl. VAT
Incl. VAT
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Description
Reliable Sequence Control with the MK1 Door Selector
Double leaf doors offer exceptional convenience and a wide entryway for busy commercial spaces, offices, and domestic properties. However, when these pairs of doors feature rebated meeting stiles, closing them properly requires a deliberate mechanical order. If the active leaf swings shut ahead of the inactive leaf, the doors clash, stick open, or fail to latch altogether. The MK1 Door Selector from Doorfit provides a practical, dependable solution that effortlessly governs door traffic and safeguards your property layout.
Engineered for ease of installation and smooth mechanical movement, this coordinator prevents frustrating door jams by mechanically holding back the active door leaf until the inactive leaf swings home completely into the frame. Whether pushed open simultaneously by busy foot traffic or allowed to glide closed at different speeds from overhead overhead closers, this mechanical hardware unit guarantees that both leaves settle neatly into their intended rest position every single time.
Manufactured to long-lasting standards, this system is supplied complete with all vital mounting accessories, including fixing plates, arms, and comprehensive instructions. It represents an essential hardware investment for standard double door openings throughout public buildings, offices, and commercial facilities where dependable sequential closing is required every day.
Application
Rebated Pairs
Door Type
Non-Fire Rated
Catch Style
Tubular Rebate
Adjuster Arm
Standard 102
Understanding Sequence Control on Double Doors
Double doors that incorporate a rebate have an overlapping lip along their vertical meeting edges. This architectural feature creates a neat aesthetic join and prevents sightlines through the middle of the doorway. However, this overlapping lip introduces a physical constraint. The inactive leaf, which houses the sunken portion of the rebate, must close prior to the active leaf, which carries the overlapping edge. If someone pushes both doors open and lets them swing freely, variations in wind pressure, hinge friction, or door closer settings often cause the active leaf to close too quickly. Without a sequence coordinator in place, the overlapping edge collides heavily against the other leaf, leaving both doors partially ajar.
The MK1 Door Selector resolves this dilemma entirely through clever mechanical interaction. When the doors swing open, the selector arm drops into an active monitoring posture. As the active door returns toward the frame, the selector arm arrests its travel just shy of the latching point. The active leaf stays paused safely in position until the inactive leaf travels home. As that second leaf approaches its closed frame position, it triggers the rebate release mechanism, lifting the selector arm clear and allowing the active door to finish closing securely. This systematic action ensures draught control, aesthetic consistency, and proper latch engagement without requiring physical supervision by building occupants.
Because the unit relies entirely on robust kinetic movement, it operates smoothly day after day without needing an electrical hookup, external sensors, or delicate digital controls. It is a straightforward mechanical coordinator built to perform reliably throughout high frequency usage.
Precision Mechanics and Kit Components
Each unit is delivered as a comprehensive coordinating kit containing all components required for standard setup on wooden or metal frames. The package includes
- Standard 102 adjuster arm designed to control door pause angles effectively
- Tubular rebate catch for neat morticing directly inside the frame structure
- Smooth operating lift arm that frees the waiting leaf at the precise moment
- Heavy duty impact plates to protect door timber from wear and surface scuffs
- Complete set of matched fixing screws along with comprehensive installation steps
These integrated components work together smoothly to minimise surface friction, guaranteeing steady door movement across thousands of opening cycles.
Standards and Compliance Guidance
Understanding regulatory requirements is critical when specifying architectural hardware. Please note that the MK1 Door Selector is not fire regulated. It is designed and intended exclusively for general commercial, institutional, and residential interior pairs of non-fire rated doors.
Although this model is harmonised under the same overarching European Standard number as our MK2 unit, that specific standard encompasses both fire door and non-fire door applications across its wider classifications. If a coordinator is not destined for self-closing fire barrier assemblies, CE marking does not apply to the hardware.
For installations guarding designated escape corridors or compartmentalised fire barriers requiring certified CE or UKCA fire ratings, please view the alternative MK2 range available across our catalogue.
Installation and Practical Fitting Steps
Installing hardware correctly is key to ensuring quiet operation and extending the lifespan of your doors. The selector is designed for frame head mounting above standard double doors, paired with the morticed tubular rebate catch. Here is a guide to achieving the best possible results on site
- Preparing the Frame Begin by confirming that your door leaves hang true and level within their frame. Check that the overhead door closers are already tensioned so both doors swing smoothly without dragging along the floor or catching on the frame jambs.
- Fitting the Tubular Catch Mortice the tubular rebate catch neatly into the door frame soffit as indicated in the supplied template instructions. This compact barrel design requires minimal woodwork removal, preserving the neat sightlines of your door surrounding.
- Securing the Selector Body and Arm Fix the selector body securely to the underside of the frame head. Fasten the standard 102 adjuster arm so that it drops smoothly to intercept the active door while staying clear of pedestrian head height.
- Mounting the Protective Impact Plates Screw the impact plates firmly to the top edge surfaces of the door leaves. These protective metal plates absorb the contact from the lift arm and selector tips, guarding timber and veneer surfaces from cosmetic wear over time.
- Testing and Fine Tuning Release both leaves together. Verify that the active door catches comfortably on the adjuster arm and pauses smoothly. As the inactive leaf closes home, it should engage the tubular catch, instantly lifting the arm away so the active leaf finishes closing completely flush.
Following these straightforward instructions ensures long trouble-free performance with minimal ongoing maintenance required.
Frequently Asked Questions
Can this unit be installed on fire doors?
No. This selector is not fire regulated and must not be used on designated fire doors or smoke barrier sets. For certified fire doors, please explore our MK2 collection which carries appropriate certification.
Does this selector work with square edged meeting stiles?
Yes, it will enable a pair of self-closing doors with or without rebated meeting stiles to close in the correct sequence irrespective of which door closes first. While most commonly specified for rebated stiles, it works reliably on plain stiles where one leaf carries latches or astragals requiring ordered closure.
What does the standard 102 adjuster arm do?
The 102 adjuster arm is the physical pivot mechanism that holds the active door slightly open until released. Its geometry is designed specifically to suit standard interior double door configurations.
Are fixing screws included in the package?
Yes, each kit arrives complete with impact plates, tubular rebate catch, lift arm, adjuster arm, all matching fixing screws, and comprehensive setup instructions.
Complete Your Double Door Hardware Setup
Ensure seamless sequential closing on your non-fire rated double doors with reliable architectural hardware from Doorfit. Order your kit online today or speak with our hardware specialists for practical guidance.
Specification
| Finish | Satin Anodised Aluminium |
|---|