What is a door closer?
The door closer is a spring-like hydraulic device on the door head. When the door is opened, it can be compressed and released to automatically close the door. It has the function of a spring door and can ensure that the door is closed to the initial position accurately and in time after it is opened. ;
Door closers are mainly used in commercial and public buildings, but they are also used in homes. They have many uses, the most important of which is to allow doors to close themselves, to limit the spread of fire, and to ventilate buildings.
The significance of the door closer is not only to automatically close the door but also to protect the door frame and the door body (smooth closing). More importantly, the door closer has become a non-negligible executive part of the intelligent management of modern buildings.
Where should door closers be installed?
There are fire protection, anti-theft, national mandatory requirements, and automatic and intelligent security systems for access control. Or the place where the door needs to be closed frequently for windproofing heat preservation, and sound insulation.
1. Such as fire access doors, building intercom security doors, hotel/hotel room doors, bathroom doors, shopping malls, hospitals, banks, vehicles and ships, office buildings, home furnishing
2. The issues that need to be considered when choosing a door closer are door weight, door width, door opening frequency, use requirements, and environment, etc.
3. Door weight and door width are the prerequisites for choosing a door closer model. Generally, a model with a small door weight should be selected with a small force. In this way, it feels easy to open the door, and it is also harmonious and beautiful when installed on the door. Secondly, small products are generally more economical.
The frequency of opening the door is closely related to the quality requirements of the product.
A. It is required that the door closer has better sealing performance and no oil leakage. The key is the technology and material of the dynamic seal.
B. The service life of the door closer is required to be long. Only in this way can we ensure long-term and normal use after installation, reduce the workload and cost of maintenance, and at the same time feel the convenience and enjoyment brought by door closer products.
Requirements for the use of door closers
1. See if you need the automatic door opener stop function after opening the door.
2. Cushioning function—resistance buffering will be generated after the door is quickly opened to a certain position, and the resistance buffering force 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 the door is opened quickly, or to escape in an emergency It prevents people from leaning forward and falling to the ground when they lose weight when opening the door quickly.
3. Delayed door closing function - the door starts to close at a constant speed and slowly from the maximum position of the door opening, and can be adjusted steplessly according to requirements. It is suitable for use in ordinary and crowded places, especially in hospitals, where there are doors and passages for the elderly, children, and people with severe diseases to enter and exit.
4. Adjustable door closing force: it can be used in places where door weights and door widths vary widely, and where the door closing resistance is relatively large due to environmental reasons. Random step-less adjustment can obtain satisfactory closing force, especially practical in coastal cities and places where the closing resistance of vehicles and ships changes frequently due to wind protection.
Why does the security door close quickly and loudly
The anti-theft door lock quickly, first checks whether the door closer is leaking oil, if oil leaks, it means that the door closer has been damaged and should be replaced;
The second is that the speed valve of the door closer is not adjusted properly. It is very simple. Use a flat-blade screwdriver to gently turn inward until the buckle is suitable and there is no sound.
1——For the lock valve.
2——Close the gate valve.
Author: Written by Anna Zhang He from S4A INDUSTRIAL CO., LIMITED
Factory Address:Building S4A, South Third Lane, Qiuyuling Street, Zhangkeng Village, Hengli Town, Dongguan City, Guangdong Province Office Address:#601,floor 6 ,building 1,JINFANGHUA industrial zone, Bantian St. Longgang Dist. Shenzhen, PRC.
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