DORMA EM500A - 24V DC Electromagnetic Door Retainer White
Code: DHEM500A
The DORMA EM500A - 24V DC Electromagnetic Door Retainer is an electromagnetic hold open door retainer that is suitable for use with overhead door closers and floor springs.
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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: DHEM500A
The DORMA EM500A - 24V DC Electromagnetic Door Retainer is an electromagnetic hold open door retainer that is suitable for use with overhead door closers and floor springs.
Code: TS91B
The DORMA TS91B EN3 Cam Action Door Closer is an easy to install slide channel door closer with a fixed power size EN3. Silver finish with a Contur design, it is both stylish and functional.
Code: DCD80F-L
The DORMA BTS80F EN4 Non Hold Open Floor Spring is a universal floorspring and comes complete with backcheck. Available as single action or double action, it offers fully adjustable closing speed. It is CE Marked and Certifire Approved CF 127.
Code: TS3000ECBC
The GEZE TS3000ECBC EN 2-3 Slide Arm Door Closer is a surface mounted rack & pinion, high efficiency overhead door closer with guide rail. It is approved for use with single-action and for use on smoke and fire doors. The closing force to EN1154 size EN 2-3 variable, closing speed, latching action & back check are adjustable.
Code: DCG500N
The GEZE TS500N EN 3 Cam Action Floor Spring is a universal floor spring and comes complete with backcheck. It is non-hold open and available as single action or double action (accessories sold separately). It offers adjustable closing speed and is suitable for 30 minute fire door applications when used with intumescent. This product is the mechanism only.
Code: DCD99SF
The DORMA TS99FL Electromagnetic Swing Free Door Closer is a guide rail electromagnetic hold-open device with a free-swing function, available in frame or standard fix mounting options.
Code: TS93EB
The DORMA TS93EMF Electromagnetic Hold Open Guide Rail Door Closer is a surface mounted cam action door closer with electromagnetic guide rail arm and hold open operation.
Code: BX24ES
The GEZE Boxer EN 2-4 Concealed Electromagnetic Hold Open Door Closer is an integrated concealed door closer complete with electromagnetic hold open facility. It is CE Marked and Certifire Approved CF 242 when used with the applicable intumescent materials (included). It comes with variable Power Size EN 2-4 and adjustable closing speed, latching action and backcheck.
Code: DCG4000W
The GEZE TS4000 Wetroom is a heavy duty overhead door closer; approved for use with left and right single-action doors with leaf widths up to 1400mm. It comes with backcheck and delayed action and is ideal for use in harsh environments with its anti-corrosive finish.
Code: TS92EB
The DORMA TS92EMF Electromagnetic Hold Open Guide Rail Door Closer is a surface mounted cam action door closer with electromagnetic guide rail arm and hold open operation.
Code: ITS96EMF30-L
The DORMA ITS96 EMF Electromagnetic Hold Open Door Closer is a concealed slide channel, cam action door closer with power size EN 2-4. This model is suitable for use on fire rated doors and has electomagnetic hold open function. It is available for FD30 and FD60 doors and is handed left or right.
Code: DCD87
The DORMA RTS87 transom door closer is available as the mechanism only or can be purchased as a complete unit, which comes complete with the floor pivot, arm, strap, cover plate, and intumescent kit for 1-hour fire doors.
Code: RTS80EMB4
The DORMA RTS 80 EMB Electromagnetic Transom Closer is available as a size EN4 or EN5 unit and ideal for use in high traffic areas like corridors in schools and hospitals.
Code: DCD80FLB-L
The DORMA BTS80FLB EN4 Electromagnetic Swing Free Floor Spring is a floor spring with electro-hydraulic free-swing function and backcheck. It is CE marked and a power size EN4.