Door closers - types, device and installation. The principle of operation of the door closer

Door closer - a mechanism that allows you to reduce the heat loss of the room that occurs due to constantly open doors. Its use in many cases prevents unauthorized persons from entering the premises; it is indispensable in remote control systems for doors based on the use of electromagnetic locks.

Proper, trouble-free operation of the door closer is a guarantee of your comfort and safety, and this can only be achieved by proper installation, compliance with all operational requirements. Otherwise, the device may fail. Is it possible to repair door closers?

How is a door closer installed?

To know how to repair a door closer, you must clearly understand the principle of its operation, as well as its device. Most of the proposed models are of the same type, despite some differences in appearance.

In a metal case filled with oil, there is a mechanism that, through a folding lever, transfers the force of closing the door to a spring, which, when compressed, accumulates the energy necessary to close the doors. The compression of the spring occurs as follows.

By means of a gear and rack, a piston is set in motion, which acts on the spring. Through the internal grooves in the piston, the oil flows into the released part of the body. Closing speed is limited by adjusting the speed of oil movement through the channels for reverse flow.

That, in general, is the whole principle of operation, a fairly simple design, which should ensure the reliability of the device and good maintainability.

Factors determining whether door closer repair is possible

Unfortunately, manufacturers seem to be not very interested in the ability to make the repair of door closers affordable. This is prompted by a number of observations, for example, an all-alloy body. If there are problems associated with oil leakage, replacing leaky oil seals, it makes no sense to take any steps other than buying a new closer.

Therefore, adjusting the door closer, as well as the correct installation of it, plays a huge role in durability. During operation, it is not necessary to fix the door in the open position with the help of improvised means, this will negatively affect the device. For such purposes, it is better to buy a door closer with the function of blocking the door when opened at more than 900.

Since the hydraulic fluid used is sensitive to fluctuations in the outside air temperature (the viscosity of the fluid changes), adjust the finishing speed during the change of seasons.

Troubleshooting

The most common failure is the failure of the folding arm, this is the main problem for door closers installed in walk-through rooms. Also, frequent shock loads, such as gusts of wind, unbalanced visitors, contribute to failure; it is not possible to hide this element of the door closer, so it often becomes a victim of vandalism.

Deformation of the lever is possible, its kink, often break out the fastening of the rod to the door or the closer itself. Such malfunctions are easily eliminated by welding, in extreme cases, you can purchase a lever assembly, they are commercially available. You can even use rods from other modifications, provided that the mount is compatible with the device.

The problems that are fixed on their own include a violation of the speed of closing and finishing. These violations are eliminated by adjusting the corresponding screws, but remember that changing the position of the adjusting screws by more than two turns from the initial position is not allowed. And, as mentioned earlier, in the event of a hydraulic fluid leak, repairing the door closer is almost impossible.

The tension force of the spring is adjusted by the corresponding nut.
From the foregoing, we can conclude - follow the rules for operating a door closer, select a model depending on the weight of the door leaf, then the device will serve reliably for a long time.

A very useful and almost invisible element is an automatic door closer. In a private house at the entrance with your own hands, it is installed very rarely, but for industrial and public institutions where a huge number of people pass, a door closer for the passage door is relevant.

It is very simple to understand the reason for the demand, because such a simple device ensures that the door to the room will always be closed, which means that precipitation, dust and noise will not penetrate inside.

Principle of operation

The essence of the mechanism is very simple, when the door leaf opens, there is pressure on the spring, and it is compressed. At this point, the oil flows into the chamber, which is free, and when the door closes, the spring pushes the piston and the oil returns to the first reservoir.

But, this is the simplest mechanism, there are devices that have additional valves, for example, for closing and closing, or, conversely, for delaying closing, and so on. They also differ in the place of installation - they are on top of the door leaf, in the middle or on the floor.

Despite the seeming simplicity of work, front door closers are one of the most complex mechanisms from the lock and hardware segment - it is almost impossible to make it yourself.

Why do you need a conductor

The mechanism that regulates the closing of the front door is necessary not only to keep warm, but also so that in the summer the outside air does not mix with the cooled air conditioner.

The closer for the fire door is relevant, which is installed on evacuation routes. It is recommended to mount the mechanism on the passages where the access control system is installed.

Types and varieties of devices

Depending on where the mechanism is installed, the following types of closers are distinguished:

• floor-mounted, that is, which is attached to the floor (you cannot install it with your own hands, without special equipment);
• an automatic hidden door closer can be placed directly in the front door leaf;
• mounted on the door leaf;
• upper mechanisms, with a crank or gear drive (the most common are to install them yourself according to the scheme).

There are also specialized sliding door closers. As a rule, such mechanisms are used in the manufacture of furniture. They can crash into the door leaf itself or into the furniture body.

According to the type of mechanism device, there is also a classification:

• knee, that is, the lever is made in the form of a knee - it is floor-standing or standard, but the principle of operation is the same;
• slide or sliding, are made without a knee, and the adjustment element is located directly on the door frame and slides in a parallel direction when moving. But, such mechanisms have a slight minus compared to lever technology, it will take more effort to open the door.

Depending on the size and weight of the door, oil door closers are also chosen, the more massive and heavier the leaf, the more force the mechanism must work. Hence there are device classes. For example, class 1 is designed for a door leaf width of 750 mm, and its weight should not exceed 20 kg. For entrance doors with a weight of 100 kg and a width of 1250, class 5 is suitable.

DIY installation

The installation work of the mechanism that will regulate the closing of the door is quite complicated. And on how accurately the preliminary calculations are carried out, the life of the device will also depend.

To begin with, the type and class of the closer is selected, depending on its location, weight and width of the door leaf.

For very heavy metal doors, it is sometimes more rational to install two mechanisms so that the load is evenly distributed.

Also, the choice of device depends on the side in which the door opens. The type of opening of the mechanism is laid initially, before manufacturing, so you need to pay attention to this moment in advance. If the opening occurs "on itself", it is recommended to install a mechanism mounted on top of the door leaf. At the same time, the box itself is mounted on the box, and the lever itself on the canvas. It is recommended to trust only specialists to mount the floor and hidden door closer.

There is no difference in what type of traction the door closer has for installation work, the technology is the same.

The wiring diagram, which, as a rule, is attached, on a scale of 1: 1, is simultaneously applied to the ceiling or the mechanism itself, and marking is made through the paper with a core.

Now holes are drilled along the markup. Do-it-yourself installation of a door closer on a metal door is done using a bong - a special fastener for steel products. Under such devices, the metal will not be deformed.

At the next stage, self-tapping screws are attached to the drilled holes. Using the screws that come with the kit, the body and lever are attached. A decorative box is superimposed on top of the body, on which a screw regulating oil door closers is displayed. After completing the installation work, it is necessary to adjust the closing force of the door. To do this, you just need to open the door, and track the speed at which it closes. If you need to increase or decrease it, then you can adjust it with a screw.

The main thing is not to make much effort when adjusting, so that the housing does not depressurize.

Visually, do-it-yourself installation is shown in the video:

Is a thermostat required?

A damper to protect against changes in atmospheric temperature exists in rare models. But the protection allows you not to adjust the mechanism with each decrease or increase in temperature. This is especially true if a floor closer is used. At the same time, its service life increases, and the viscosity of the oil does not increase, or vice versa, it does not expand.

It is very difficult to advise in this case. For example, a street closer with a thermal shutter, especially a floor-mounted one, is more expensive than a conventional mechanism, but will last much longer. Consider the conditions under which the device will operate. If the mechanism is installed on external doors, then it is necessary to take into account temperature differences, which will be outside and which will be inside the room.

In conclusion, I would like to note that due to the complexity of the mechanism of the device, it is quite difficult to externally determine its quality. Therefore, the choice should not be based on price, but on the seriousness of the manufacturer's trademark. The quality of stamping is not the main reason for buying, it is very important how accurately the parts are machined, what seals and oil were used.

Sections of the article:

Doors meet us in any institution, whether it is an entrance to an entrance, an apartment, a room, administrative buildings or technical premises. Sometimes they give in to us easily and silently, quickly open and close, then we seem to not notice them, without being distracted by the need for additional efforts. But in case of any malfunction, the discomfort of opening the door becomes very noticeable and only adjusting the door closer can help. With your own hands, you can not only adjust, but also install the mounting mechanism, so feel free to take on this procedure.

The door closer is adjusted manually, without the use of additional equipment. You may need, perhaps, a screwdriver. Most often, the screws that secure the device to the plane and frame require a straight-slotted screwdriver.

Features of the design of the device and the progress of the adjustment

Adjustment of the door closer is impossible without a clear understanding of the principle of operation of the mechanism. A closer is a spring combined with rollers and pistons, or with a gear mounted on a rail. When the door opens or closes, the mechanism comes into action, collecting or, conversely, opening the spring. In this case, the vacant cavity is filled with oil. The combination of hydraulics and mechanics gives a reliable and simple device that does not require additional care, except for careful handling.

Preparatory stage

If your door slams shut with a deafening thud from a draft, pinches children's fingers as soon as they weaken the force holding the door, it is difficult to open, as if stuck in one of the stages, it's time to adjust the door closer.

Like any job, adjusting the door closer begins with the preparation of the necessary materials. You will need: a screwdriver, original instructions, photo examples of repairing and adjusting the device, a chair that you can stand on if your height does not allow you to comfortably reach the top mount.

First you need to open the box. This is a rectangular box. Removing the top cover is usually not difficult, it is fixed by the snap-in principle. The principle of the cabinet construction is the same in any kind of door closer, so even if your system looks like an impregnable metal plate, most likely there are invisible seams somewhere, and it's all about skillful design.

How to adjust the door closer, tell the principle of its operation.

Perhaps your device only has two valves. In this case, their adjustment will be enough. Tighter or looser, it's up to you. If the door is difficult to give in, you need to loosen the fixation, because it is inconvenient, the door can be difficult to give in to children, press a pet, create an additional load when bringing in and taking out goods. If the door is loose and closes and opens easily and quickly, there is a risk of getting hit by the door.

Door closer device.

Adjustment of door closers should alternate with testing the result. To do this, the door will need to be opened wide and closed, at the beginning with some effort, and then - releasing. The ideal speed will be a slow, even closing, at the last stage of which the latch quickly slams shut. If we are talking about the entrance door, for security reasons, you can increase the closing speed so that no one can enter the house by following the tenant.

Working with screws

With a rough idea of ​​what result you want to achieve, you are ready to learn how to adjust the door closer. On the instructions supplied by the manufacturer, two screws are usually indicated, which are responsible for the speed of closing the door.

They are numbered 1 and 2, so you can easily identify them on the door closer. They can be rotated clockwise and counterclockwise. It is important to remember that turning more than two turns of any of the screws can lead to breakage. The first such screw (or valve) is responsible for opening the door from 15 to 180 degrees, the second acts as a closer, that is, it regulates the speed of the door in the range from 0 to 15 degrees and ensures reliable closing with a latch or combination lock. The rotation of each of these nuts-screws is reflected in the properties of the door.

In some models of door closer adjustment, there may be more filigree. This happens if the closer setting allows the door to delimit the opening angles more carefully.

Additional functions

The wind brake, referred to as BC (Back check), prevents the door from hitting when turning 180 degrees. He is responsible for adjusting the door closer at the stage from 70 to 180 degrees, slowing down the closing speed.

The DA (Delay action) slow closing function helps to prevent a strong pressure of the door in the area from 180 to 70 degrees, allowing a person to calmly pass through the door after opening it without making additional efforts.

Additional functions.

The Hold Open function allows you to lock the door in the open position. To do this, it will only be necessary to open it wide open. To close the door, you will only need to forcefully pull it towards you.

For the first two functions, there are separate screws that look like the main ones. You can set up the advanced door closer with the same screwdriver that is used for a conventional device.

Most often, the closing retarder is located next to the two main valves, and the aircraft separately, on the same plane.

Before adjusting the door closer, you can watch a video, but even a child can handle this work. Turning clockwise increases the closing speed, counterclockwise decreases it. This rule applies to all screws available on the door closer, both in the "sliding" and in the "lever" system.

The adjusted position of all valves will lead to a perfect operation of the door. The reliability that the door closer will have can be guaranteed by adjustment for several months in advance. The subtlety is that in winter and summer there are different temperature conditions of operation, and the oil inside the mechanism can affect the speed of spring compression in different ways. In view of this, it is better to tighten the screws at least twice a year, after winter and after summer. If the characteristics of closing the door change after the winter, you should not be upset, this is normal, the main thing is to return the actual properties of the door to the proper level in time.

How to adjust the door closer is described in detail in the video presented in our article. It describes the process of work in stages, thanks to which even a person who is far from construction and crafts will be able to correct such details in his home.

Ease of action

There are a number of useful tips on how to save the mechanism and not adjust the door closer in the future. First of all, you do not need to load the mechanism - do not let children ride on the door, do not hang heavy objects on it. Secondly, do not press hard on it when opening it. Thirdly, choose a door closer that matches the parameters of your door.

Our article, as well as photo and video materials, can suggest how to adjust the door closer with your own hands. Strength is not needed here, skill is enough, so both a woman and a teenager can cope with such work. If you don't know how to adjust your or public front door closer, don't be discouraged, just imagine if you would like to close faster from the widest position, or just slam at the palm of your hand. In a couple of seconds, you can understand how to increase the resistance of the door and how to weaken it. Any door closer is easily adjustable and can only be broken if the tension force exceeds its technical capabilities. In this case, you will see an oil leak, and this will mean that the device will have to be changed. After completing the work, do not forget to replace the cover and check the operation of the door again.

What to do if nothing works?

It happens that the door closer is adjusted with good informational preparation, the instructions are at hand, but still the result cannot be achieved.

The range of modern closers is very diverse.

In this case, the point is the wrong choice of this part, especially for heavy metal entrance doors. Most likely, the index of the European standard does not match the weight or width of the door, the corner for fastening is incorrectly attached, or the holes for the self-tapping screws that hold the closer are displaced.

In this case, the question of how to adjust the door closer is not correct, since you need to change the doors of the intercom, or, more likely, remove the door closer and insert a new, more powerful one. You should also pay attention to the lever, it should be perpendicular to the plane of the door. If it is misaligned, one of the closer links may need to be moved. When purchasing door closers, be aware that adjustment is easy, especially if the instructions are not lost.

The closer is a device for returning the door to its original position in the automatic operation mode. This device silently and softly covers the opened sash. If necessary, it holds the door leaf open. Many doors are equipped with a modern practical device. However, like any technique, the door closer needs maintenance, adjustment and troubleshooting.

Types of mechanisms and their device

To better understand the principle of the functioning of the mechanism, you need to analyze its basic varieties, so it will be easier to figure out how to correctly debug the door closer.

For the most part, these two types of this device are practiced:

• cam slide - performs soft sliding, practiced for canvases with low weight;

• gear lever - the most common type of mechanism, the movement of the spring is realized through gears, it can be used even for massive door panels.

According to the method of mounting, fixtures can be divided into three main types:

• Overhead structures (overhead)- these are the most uncomplicated devices to use, their functions can be adjusted using a few screws or valves located on the case panel. They are mounted at the top of the sash, which is extremely convenient for installation. For entrance street doors, specialized oil-filled devices are manufactured, adapted for operation in hot or cold climates.

• Floor. Floor-mounted systems are also relatively easy to set up. They proved to be excellent in banking institutions, offices, shopping and entertainment centers and where high demands are placed on the appearance of doors. These devices are integrated into the floor and are almost invisible to visitors. Sliding type regulator mechanisms are used, designed for doors weighing no more than 100 kilograms.

• Hidden devices it is quite problematic to adjust it yourself, since they are removed inside the door leaf or on the floor, which complicates access to them. Devices are in demand where a thorough cosmetic finish and an ideal main facade are needed.

According to the principle of operation of the device are as follows:

• hydraulic;
• pneumatic;
• electrical.

fixture structure

In the structure of this device the following parts and mechanisms are included:

• die-cast aluminum body;
• spring;
• piston;
• adjusting screws (valve);

• gears;
• needle bearing;
• rubber seals;
• fixture.

The principle of operation of the closer

The basic component of the design is a spring system, which, when the door is opened, is compressed and accumulates the energy required to close the door. The compression process is carried out by transferring the force of the traction device to the spring. Gears and racks move the piston, while the oil flows through the internal channels into the free part of the housing. During the reverse stroke of the door, the spring straightens and provides a soft closing.

In what cases is the procedure necessary?

Correcting the operation of a door closer is a fairly simple matter. The setting can be easily done with your own hands. It is worth understanding in what situations it may be necessary to adjust the parameters of this mechanism. The first thing to remember is that the duration of the uninterrupted functioning of any mechanism is directly based on the quality of its maintenance throughout the entire period of operation. As a result, 1-2 times a year, it is required to inspect the door closer and eliminate minor malfunctions. This is especially important during the transitional change of seasons.

In summer and winter, the climate conditions are enormously different. Most of the closers are filled with oil, and as you know, any liquid changes its state when the ambient temperature changes. In particular, in winter, the oil becomes thicker and the door leaf moves more slowly. In summer, everything turns out the opposite, so you need to prepare the door closer to the required level. Adjustment of the device is also needed if you notice any malfunctions or you simply do not like the settings you have set. If the device starts to slow down or the closing of the door leaf is too hard and fast, jumps, does not attract for a long time, you can try to correct all this. Things get a little more complicated when the device is out of order, since a simple setup will no longer be effective and repair work will need to be done.

Instructions for setting up a door closer with your own hands

To adjust the device, it is not necessary to invite the master. It is enough to have a minimum set of tools and certain skills. The whole procedure will take a minimum amount of time and will make it possible to achieve the desired result by adhering to the steps listed below.

• Before proceeding with the procedure itself, remember that the main thing is not to overdo it with the control valves (screws). It is acceptable to make only 2 turns, then difficulties may arise. The oil in the pressurized reservoir may spill out and the hydraulic system of the closer will eventually lose its functionality.
• To adjust the closing speed of the door leaf, it is necessary to learn only one trend - by turning the valve clockwise, it will gradually decrease. If the action is performed in the opposite direction, the closing speed will increase.

• There is a solution to the problem of only one person being able to get through. Since there is a third valve, the adjustment of which can keep the door in a fixed position for a certain time. Therefore, even a group of people will be able to freely enter the room.
• Such a problem as a lack of effort to completely close the door leaf is eliminated by adjusting the valves responsible for closing speed.

Finding the perfect solution can be a key problem when adjusting a door closer. The main task is to close the door to the end so that there are no gaps. It is necessary to correctly select the ideal time that the door leaf can be in the open state. It is also required to make silent closing possible, hard blows against the door frame are unacceptable. This can cause damage to the canvas. And the worst option could be the loss of efficiency of the mechanisms responsible for proper operation.

How to adjust the closing force so that the door does not slam?

For self-tuning, you will need a flat-end screwdriver or an Allen wrench. The door opens to the end, special valves are fixed, located at the end of the device. Full fixation is carried out with the door leaf closed. By changing the degree of tightening of the valves, you can adjust the door to an extremely comfortable closing. Valve number 1 is responsible for the closing force of the door.

If the fully open door closes too quickly at the beginning, the valve must be tightened, and if it is slow and it is necessary to increase the speed, on the contrary, unscrew it. Valve number 2 is responsible for the speed of complete closing of the door leaf (slam). Separate modifications have a third valve that adjusts all the efforts of the door closer. With proper adjustment, the door leaf moves smoothly, without jerking. The result of proper installation and competent attitude of the door closer will be a long service life.

Important! You can not turn the control valves completely. Otherwise, they will cease to fulfill their functional purpose even after they return to their place.

How to weaken the opening?

Quite often, the closer requires additional configuration. If the mechanism works hard, and in the process of opening the door it is necessary to make efforts - it is necessary to release the valves, the door will begin to function smoothly. Valves can be placed at the end or on the front side, it all depends on the modification of the device. You can find out the location of the valves by looking in the manual, where the manufacturer indicates the location of all the components and elements of the door closing mechanism.

Position open

At times there is a need for an open door for a relatively long period of time. It is worth figuring out how to adjust the device so that the doors do not close, but stay open. In many modifications of door closers, there is an auxiliary hold open option for this. To configure it for this mode, you need to open the door approximately 90 degrees, and then tighten the specialized latch. After such simple actions, it will be possible to leave the door leaf open when opening it to the configured degree. A special latch will be activated in the device and will hold the door in this position for as long as necessary. If you need to close the door, you just need to pull it towards you, and it will be removed from the latch. If the door is not opened to the limit, it will move in the same way as always, without stopping.

A door closer is a mechanism that is designed to securely close entrance doors. It presses the web to the seals along the contour or creates the necessary force, sufficient to trigger the latch of the lock. The door can close abruptly and with a sound, or smoothly and without making sounds, it can also be suspended.

Adjustment of the door closer is a mandatory measure to extend the life and maintain the performance of the mechanism.

Constant loads act on it, frequent closing and opening of the door lead to an imbalance in the elements of the device, therefore, it requires periodic maintenance and repair, both for preventive purposes and if necessary.

To understand the issue of customization, you first need to familiarize yourself with its classification.

They are of 2 types:

• Cam slide. It is used for smooth closing of blocks in lightweight structures.
• Toothed lever. Used for heavy canvas with codes, it is considered the most common.

According to the installation method, closers are divided into the following types:

1. Top or overhead. Installation is carried out on top of the structure.
2. Floor. Often attached to the bottom of the blocks.
3. Hidden or frame. They are located inside the frame or in the floor.

When to Adjust

Experts recommend adjusting the mechanism immediately after installing the door closer, and not only during the operation of the doors. Inspection and correction of minor problems is carried out at least 2 times a year, with frequent fluctuations in the temperature regime indoors and outdoors - more often. This is due to the fact that the lubricating fluid depends on the temperature parameters of the environment and affects the details of the closer.

Seasonal adjustment is a regular maintenance activity.

With large fluctuations in temperature, the front door mechanism wears out quickly and comes into disrepair. Therefore, it is better, when the first signs of damage to the closer occur, to pull it up to the desired position, check the tightness to detect oil leaks and troubleshoot.

In case of complex breakdowns, adjusting the door closer on your own is ineffective. Experts recommend repairing or replacing it.

If there are problems with the set device settings, the parameters are adjusted. This procedure is performed if the mechanism turned out to be tight opening, as well as when the door closes quickly and abruptly or for a long time.

How to

Adjustment of the door closer, the instructions of which provide the requirements for the installation and configuration of the mechanism, consists of the following steps:

• Block closing speed adjustment.
• Setting the parameters for pressing the canvas to the box (finishing).
• Intermediate stroke adjustment.

The procedure requires a minimum of tools - a screwdriver.

How can you do it yourself

In order to understand how to adjust the door closer, you need to understand the design features of the device.

The mechanism consists of the following components and parts:

1. spring;
2. linkage;
3. axial gear clutch;
4. gear or cam mechanism;
5. needle bearing;
6. wind brake adjustment valve or damper;
7. protective cover;
8. lever arm;
9. sealing rubber;
10. adjusting screws;
11. fasteners.

When working, it is necessary to adhere to the strict rules of the installation and adjustment instructions for the device, which boils down to spring tension.

On the body of the closer, when setting up, they find 2 adjusting screws that are responsible for the speed of movement of the web and the speed of closing. The first screw regulates the main travel of the door from a full opening of 180° to 15°, and the second one regulates its final closing. Some models also have a third screw to change the total force.

The procedure is performed as follows:

• Remove the cover from the mechanism.
• Find the control valve. Refer to the diagram in the instructions for the door mechanism.
• Turn screw No. 1 counterclockwise to adjust the smooth closing of the doors, clockwise for a quick one. In this case, it must be borne in mind that more than 2 revolutions from the zero position cannot be done.
• To delay the open door leaf for a certain amount of time, you need to tighten a special lock. Such actions are performed when the block is opened at 95-100 °.
• If the canvas needs to be kept open for a long time, use the "Hold-open" function. To do this, open the door 90-95° and tighten the lever lock.
• Check the correct installation of the mechanism.

Parameters

When adjusting the door closer with your own hands, considerable attention is paid to such parameters as:

1. closing force;
2. closing speed;
3. opening speed;
4. maximum opening angle.

Closing speed is how fast or slow the doors close. The closing force allows you to adjust the device so that at the last 7-15 ° the speed increases and the lock snaps into place.

To protect the door block from damage during sudden openings, adjust the opening speed. For this purpose, closers with a braking function, such as a “wind brake”, are installed on the entrance doors of buildings.

Retract adjustment

The setting of the door closer for the installation of a door closer ensures that the leaf adheres to the frame, allows you to leave a small gap before slamming, i.e. does not completely close the door structure. By adjusting, you can adjust the slow closing of the block, reducing the strength of the cotton.

Using screw number 2, you can adjust the speed at which the structure will slam shut. When 10-15° remains before the door leaf closes, the deceleration will work.

Features of some models

The most common door closers among users are Dorma TS-68, Diplomat, GEZE TS 4000. Each model has its own regulation features for such devices.

"Dorma" TS-68 is a classic top-mounted model. Its peculiarity lies in the fact that the mechanism is equipped with a special lever for changing the door locking force.

The model "Diplomat" is characterized by simple installation and maintenance of the mechanism. Adjustment of the door closer includes the steps of spring tension and opening-closing adjustments. In some modifications of the "Diplomat" there is no rebound setting. The devices operate on the principle of hydromechanics.

"GEZE" TS 4000 is a popular model of the upper door mechanism among users. The closer can adjust the opening damping, set the thermostable closing speed at the front and the final rebound by means of a link arm.