DORMA RTS85 EN4 Transom Concealed Door Closer
Code: DC85H9
The DORMA RTS85 EN4 Transom Concealed Door Closer for single or double action doors available in 90 or 105 degree hold open, non hold open and blind closer options.
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We offer a selection of door closers from leading manufacturers such as Geze, Dorma, Briton and Arrow. Door closers are available to suit all budgets and situations including both manual and automatic doors as well as electromagnetic hold open and swing free applications. The range is complemented with concealed door closers from Geze and Perko for use in situations where a clean, aesthetically pleasing finish to the door is required.
Approved Doc M and BS8300: Relates to accessibility and the code of practice in the design of buildings to meet the needs of disabled people. Swing Free Door closers with adjustable power sizes can help with ease of access throughout a building and will often be specified on new building projects.
Part B: To do with Fire Safety – electromagnetic door closers and holders are Part B compliant. See our blog for more information on this.
We try to ensure that choosing the right door closer for you is as easy as possible and simplify technical terminology so that you know what you’re purchasing. If you are in any doubt and would like assistance with your choice, please contact the sales team on 01305 263300 or email them at [email protected]
Backcheck – Is the cushioning effect you feel when the door is swung open and is prevented from slamming into the wall behind it. It’s a useful feature to ensure that door hardware and the door itself are given a certain level of protection from misuse. Closers with backcheck are also referred to as soft door closers.
Delayed Action/Delayed Close – In simple terms, this means the length of time it takes for the door to close after being opened. It’s often a desirable feature for Care Homes or areas where it may take people a little more time to get through the door unharmed. This function could also be referred to as a door soft closer.
Power Size – This is either fixed at a set number or variable (adjustable). The power size required is determined by the door weight and width. (See Power Size Table below).
Closing Speed – This is the adjustment for the general speed of the door closing. Installers often make the mistake of adjusting this to close the door when first installing a closer, the Power Size should always be adjusted first.
Latching Action – This is adjustable and refers to the final few degrees of closing. This is beneficial to overcome any issues with the latch or seal on a door.
Mechanical Hold Open – A Hold Open Arm can be used on door closers to achieve a rigid hold open function, however these must never be used on Fire Doors.
Hold Open – Electromagnetic Hold Open: Ideal for use on Fire Doors; the Hold Open function means that the door is held open permanently at a fixed angle (unless released by the fire alarm activation). Usually this function is provided in the cam being used, the arm itself or a mechanism inside the slide channel.
Electromagnetic Free Swing – This function means that the door with the electromagnetic closer will act like a door that doesn’t have any closer on it. It means that the door will stay open at whatever angle it is left at but will close in the event of a fire. It’s a particularly good feature to use on Care Home Bedroom Doors when Hold Open function would cause privacy issues and it meets the barrier-free needs of less-abled users.
EN Power Size |
Max. Door Weight (kg) |
Max. Door Width (mm) |
1 |
20 |
750 |
2 |
40 |
850 |
3 |
60 |
950 |
4 |
80 |
1100 |
5 |
100 |
1250 |
6 |
120 |
1400 |
7 |
160 |
1600 |
The above guide is just a guide, based on optimal testing conditions and does not take into consideration any site variables such as the following:
As well as the above, when making a decision on what type of door closer you require, it is a good idea to think about the following:
Arms and Mechanisms:
See Overhead Door Closers for more information.
There are several types of Door Closers available:
More specific information can be found within the subcategories on this website.
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Code: DC85H9
The DORMA RTS85 EN4 Transom Concealed Door Closer for single or double action doors available in 90 or 105 degree hold open, non hold open and blind closer options.
Code: ITS96
The DORMA ITS96 Concealed Door Closer is a concealed slide channel, cam action door closer with power size EN 2-4. It has adjustable latch action and adjustable closing force plus anti-tamper protection.
Code: DCD98SA
DORMA 22002401, 22003001 & 53000501 Arms are standard, hold open or swing free arms to suit the DORMA door closers.
Code: DCG500NV
The GEZE TS500NV EN 1 - 4 Cam Action Floor Spring is a universal floor spring and comes complete with backcheck. It does not hold open and is suitable for fire door applications when used with intumescent. This product is the mechanism only - accessories including cover plate and door straps are sold separately.
Code: ZGZ006666
A GEZE Double Action Top Centre - Type C for double action doors.
Code: DHEM800
The ARROW 800 Series Electromagnetic Door Holder operates at 24V DC. It has a 200NM Holding force and has a silver finish.
Code: DCD73VBC
The DORMA TS73V BC Size 2 - 4 Door Closer is a fully adjustable variable power size, medium to heavy duty, rack and pinion door closer with backcheck.
Code: DHEMFB
The Geofire Floor Bracket allows for floor mounting of the Geofire electromagnetic door retainers.
Code: DCD75V
The DORMA BTS75V Floor Spring Mechanism Only is a size EN1-4 Floorspring with backcheck. It is CE Marked, available in single or double action and is not handed.
Code: DCGAL
GEZE 420mm TS4000E Transfer Cable Loop - Replacement flexible cable loop and box for the Geze TS4000E.
Code: ZGZ125146
The GEZE 125146 Double Action Pivot Set is for use on timber doors and can be used in conjunction with the GEZE Boxer door closers. Select from fire rated or non-fire rated options.
Code: TS5000
The GEZE TS5000 EN 2 - 6 Slide Arm Door Closer is a very heavy duty, surface mounted rack and pinion door closer with guide rail which is approved for use single action and for use on smoke and fire door. The closing force is a variable Power Size EN 2-6 and comes with adjustable closing speed, latching action and back check.
Code: DCD93GNCLS
The DORMA G-N 35800093 Limiting Stay helps minimise damage from doors that are opened normally, against adjacent walls.
Code: DCD93GNHO
This DORMA G-N Mechanical Hold Open Unit 18570000 is for use with the TS91, TS92 and TS93 Overhead Door Closers.
Code: ZGZ007432
A GEZE Double Action Bottom Strap for double action doors.
Code: ZDM8066
The DORMA 8066 Top Centre - Complete Unit for use with DORMA Double Action Floor Springs.
Code: TS3000VE
The GEZE TS3000VE EN 1-4 Electromagnetic Hold Open Slide Arm Door Closer is a surface mounted overhead door closer with a guide rail arm suitable for doors up to 1100mm and fire doors when connected to the fire alarm system.
Code: DCD80EMB
The DORMA BTS80EMB EN4 Electromagnetic Hold Open Floor Spring has electrohydraulic hold-open and integral pressure compensation feature for multipoint hold open between 65° and 175°. With adjustable, hydraulically controlled closing speed, adjustable latching action and backcheck.
Code: DCG550NV
The GEZE TS550NV FP EN 3 - 6 Cam Action Floor Spring is a universal floor spring and comes complete with backcheck. It offers fully adjustable spring strength, latch action and closing speed. It is ideal for very heavy doors that are in areas of high traffic.
Code: DAPDA80
A DORMA Double Action Floor Spring Accessory Pack for use with DORMA floor springs on Double Action Doors.
Code: TS5000E
The GEZE TS5000E EN 2-6 Electromagnetic Hold Open Slide Arm Door Closer is a surface mounted door closer with an electromagnetic hold open guide rail arm suitable for doors up to 1400mm. The hold open can be adjusted between 80° and 130°. The closing force, Power Size EN 2-6, closing speed, the end stop and the back check are adjustable.
Code: TS3000V
The GEZE TS3000V EN 1-4 Slide Arm Door Closer is a medium to heavy duty, surface mounted rack and pinion door closer with guide rail. It has a variable power size EN 1-4 and comes with adjustable closing speed & latching action. It is suitable for fire door applications.
Code: DC8550
The DORMA 8550/1 Universal Side Load Floor Pivot is a floor pivot set (end-load installation) for use with transom door closers and top rails with a minimum 21mm channel depth and 35mm width.