The application scope of the door closer is divided into which occasions need to use the door closer.

What are the application scopes of door closers? When do you need to use a door closer? In fact, door closers are mainly used in commercial and public buildings, but also in families. They have many uses, the most important of which is to make doors close automatically to limit the spread of fire and ventilation in buildings. Let me give you a detailed introduction.

1, where do you need to install door closers?

There are fire prevention, anti-theft and national mandatory requirements, as well as access control automation and intelligent security system. Or the door needs wind, heat and sound insulation.

Usually closed place

Such as: fire exit doors, building intercom security doors, hotel/guesthouse doors, bathroom doors, shopping malls, hospitals, banks, vehicles and boats, office buildings and houses.

2. Problems to be considered when selecting a door closer: door weight, door width, door opening frequency, use requirements and environment, etc.

The weight and width of the door are prerequisites for selecting the door closer model. Generally, if the weight of the door is small, choose the model with low strength, so that it is easy to open the door and the installation on the door is harmonious and beautiful. Secondly, small products are usually more economical.

The frequency of door opening is closely related to the quality requirements of products:

A, it is required that the door closers should be well sealed without oil leakage. The key is the technology and material of dynamic seal.

B, the service life of the door closer is longer. Only in this way can we ensure the long-term normal use after installation, reduce the workload and cost of maintenance, and at the same time feel the convenience and enjoyment brought by the door closer product.

3, use requirements include:

1), whether it is necessary to have automatic door stop function after opening the door.

2) Buffer function-negative buffer is generated after the door is quickly opened to a certain position, and the damping buffer strength and range can be adjusted according to the use requirements; This function is used to prevent the door or lock from colliding with the wall when opening the door quickly, or to prevent people from leaning forward and falling to the ground when opening the door quickly.

3) Delayed door closing function-the door closes slowly at a constant speed from the maximum position of opening the door, and can be adjusted steplessly as required. Suitable for ordinary and crowded places,

Especially in hospitals, there are doors and passages for the elderly, children and people with diseases. 4) Function of adjusting closing force: It can be used for different doors with a wide range of door weight and width, and places with large closing resistance due to environmental reasons. Arbitrary stepless adjustment can obtain satisfactory closing force, which is especially practical in coastal cities and places where the wind resistance of vehicles and boats often changes.

5) Operating environment: fire prevention requirements (fire prevention requirements) and anti-freezing requirements (places at minus 35 degrees in winter). )

1) The oil leakage rate is lower than 0. 1%.

2) The flame arrester can work continuously at an ambient temperature below 60 degrees.

3) Anti-freezing door closers can work normally above minus 42 degrees.

4) During the two-year warranty period, if there is any quality problem, it can be replaced free of charge at the local dealer or office.

Why does the security door close quickly and loudly?

The security door will close soon. First, check whether the door closer leaks oil. If there is oil leakage, the door closer has been damaged.

Should be replaced; Secondly, the speed valve of the door closer is not properly adjusted, which is very simple. Just turn it inward slightly with a screwdriver until it locks properly and there is no sound.

1-it's a door lock valve.

2- Close the valve.