Answers to frequently asked questions
Here you will find some answers to frequently asked questions. But we would be happy to help you personally! Just contact us.
Fire doors inevitably deform under the high temperatures during fire tests. However, these deformations may only reach such an point, so that the fire protection in adjacent fire compartments is still maintained. For example, there must be no gap between door leaf and frame that would allow fire to spread.
Especially very high and wide T30 doors reach their load limit very quickly due to their lighter construction and, during the fire test, inadmissibly large gaps normally form. The same applies to double-leaf systems, as there is no stop between both leafs and the fitting elements have to absorb all forces by themselves.
Consequence: Fire / smoke can propagarte through these openings. The fire or smoke protection property of the door is thus not achieved and the door does not pass the test.
As soon as the temperature rises to approx. 600 °C, the DICTATOR HLS thermal bolting ensures that the door leaf is securely fixed to the frame and cannot deform in such a way that dangerous gaps develop.
In addition, the HLS locking system offers manufacturers a great advantage: The construction of the doors may be made lighter, and don’t have to be designed as stable against warping and deformation and still meet the requirements for their fire resistance class. This saves costs, especially for material, and reduces the weight of the door.
Front doors that bang or don’t close completely – especially in combination with an overhead door closer – can be quite annoying. But they are no problem for DICTATOR door dampers. Whether there is an overhead door closer or not, it always makes sure the door closes quietly and reliably.
But what to do if there is no space for the hook above the door or if the door features a large glass pannel in which you cannot fix the door damper vertically?
In this case, you can use the door damper VS 2000, since the standard model can also be mounted horizontally. The version with 20 N spring used to be the ‘normal’ one, however, due to the new Heat Insulation Ordinance, doors are now better insulated and thus have become heavier and thicker. Also, additional sealings make closing the door more difficult and therefore a VS 2000 with a closing force of 20 N is often not strong enough. A model with a 50 N spring would easily prevent the door from banging and would close it completely, BUT for some users the force required to open the door would be too high.
The DICTATOR answer to this problem: since mid 2017 DICTATOR provides the door damper VS 2000 also with a closing force of 35 N. And, since then, these unresolved cases are a thing of the past.
The door damper VS 2000 is placed directly at the closing edge, as there is not enough space for the hook above the door. This is no problem with a 35 N closing spring.
How can a sliding door be opened without an electric door operator?
Normally, the task of a door closer is to close a door automatically. In the case of this “escape” doors in the Twisted Rooms Hamburg, however, a double sliding door should open automatically but mechanically – without the need of electricity – in order to allow the people to exit the room after they’ve solved the puzzle. Both leaves should open in sync, slowly and quietly. And all this without using an electric door operator.
The sliding door was equipped with the DICTAMAT 50 BK-Z. Normally, it works as a sliding door closer, but for this application in the Escape Room it was converted into a door opener. Both leaves are opened with one DICTAMAT 50 BK-Z. The speed is steplessly adjustable and can therefore be adapted to the exact requirements. Under the link, you’ll find more information about this application for a mechanical door opener for Escape Room doors.
Normal hinged door operators may not be able to cope with hinged doors opening to the outside and therefore in part exposed to high wind loads. The wind prevents the correct opening and closing and in the worst case causes damage to the door and the façade, even people might get injured.
The DICTATOR solution
For such applications DICTATOR offers a special hinged door operator, the DICTAMAT 310-21. Two models are available: with 200 Nm and 700 Nm. The stronger model braves winds of up to 9 Beaufort. The driving unit achieves its power by means of a special gearbox. Safety sensors which supervise the whole door area ensure the safety.
Examples of such doors can be found in these applications:
The R1400 door check is mounted on the closing face of the door. For this type of mounting the lintel should start just above the door leaf, because the hook is normally fixed to the lintel. However, this is not always the case because the door leaf is often flush with the frame.
DICTATOR solved this problem with a small, inconspicuous bracket. It allows to mount the hook on a flush frame. The bracket facilitates the individual positioning of hook and door check, thus considerably expanding the application possibilities of the R1400 door check.
Normally it is not possible to install traditional overhead door closers onto arched doors (or only when “inventing” a special construction). And this would considerably affect the special aesthetics of an arched door. And, when the arch is pronounced, there is virtually no possibility.
With the DIREKT door closer this problem can be easily solved. It doesn’t require any lever arms. One end is fixed to the door frame or the wall and the other one on the door leaf. The closing speed can be adjusted exactly to the requirements on site. And the DIREKT door closer makes sure the door is always reliably closed.
Entrance doors – also side entrances – should normally be securely closed. But what to do if there is no space above the door for mounting a normal overhead door closer?
The door closer DIREKT solves this problem. One of its ends is fixed to the door frame and the other directly on the door leaf. Its closing speed can be ajusted exactly to the requirements on site. It is also possible to adjust the closing speed and even close the door very slowly.
Sliding doors often remain open. However, there are many reasons why they should be closed, for example:
- to prevent unnecessary heating due to temperature loss because the door is opened.
- to optimize the use of air conditioning in cold aisle containments for server installations or data processing centres.
- to ensure privacy and an optimum working and hygienic conditions in examination and emergency rooms of hospitals.
- …and many more (as e.g. to prevent birds from flying into a building, e.g. in a church).
An automated door operator needs electricity. This means that an electrical connection is required on every door and power is consumed. And a door operator on a highly frequented door needs to be serviced often.
The mechanical door closer for sliding doors DICTAMAT 50 easily adapts to the respective door situation – thanks to the many models. The DICTAMAT 50 needs no electricity for closing – no connection to the mains is required. The closing speed is adjustable, thus ensuring optimal safety for people and goods.
Often front doors equipped with an overhead door closer close too fast and with a loud bang – or they don’t close completely. In appartment blocks this often causes discomfort, e.g. when the banging front door interrupts a neighbour’s sleep. A front door that closes too fast also makes it difficult to pass through with e.g. shopping bags or with a stroller. Also people who are not so fast anymore may have trouble passing through the door without being pushed.
The gate closer DIREKT is often used for gates in fences, however, it is also suitable for front doors or entrance doors. It provides a steady, slow closing and makes sure the door closes completely – without loud noises and in spite of its low closing speed. This not only prevents the annoyance due to noise but also injuries due to the banging of the door.
The gate closer DIREKT can also be retrofitted and its external adjusting possibility allows to adjust the closing speed exactly .