How to choose the door closer

Door control hardware refers to door closer, floor springs, hinges, latches, locks, door stoppers, etc., which are widely used in wooden doors, glass doors, metal doors and other door hardware accessories. Control door hardware is a kind of daily-use metal products that are extremely important to people's daily life. Floor springs and door closer are the most important part. They are generally used in public places where the people frequently accessed, such as shopping malls, office buildings, residential buildings, exhibition halls, etc. It can ensure that after the door is opened, it will remain normally open or can be closed to the initial position in time.

The reasonable configuration of the door control hardware can effectively realize the using function of the door, the fire evacuation function, the security function etc. How to properly configure the hardware and make the door fully plays the various functions of the door is the importance of the door control hardware. Here we will introduce one of the main hardware in the door control hardware - the door closer. Analyze the selection and key points of the door closer.

There are two main concerns:

1. Understand the role of the door closer to the door control hardware

2. Select the door closer according to the using requirements

 

1. Understand the role of the door closer to the door control hardware

The door closer is a spring-like hydraulic device on the door. When the door is opened, it can be released by compression, and the door is automatically closed. It has the function of a spring door to ensure accurate and timely closing to the initial position after the door is opened. The door closer has an automatic closing function to ensure that the door can be automatically closed after it is opened. The core of the hydraulic door closer design idea is to realize the control of the closing process, so that the various functional indicators of the closing process can be adjusted according to the needs of the person.

 

2. Select the door closer according to the using requirements

The factors that should be considered when choosing a door closer are: the width of the door, the frequency of opening the door, using requirement and usage environment.

The width of the door is the most important factor of selecting the type of door closer. Common doors are including fire doors, wooden doors, aluminum doors, glass doors, and steel doors.

If the weight of the door is small, choose a model with less power. The opening frequency is a factor closely related to the quality of the product. For frequently used occasions, the sealing performance of the product should be good and the service life should be long.

Here are the key points to choose:

2-1. Is it necessary to have the whole open function, to hold the door in the open position;

2-2. Back Check——to slows the door in the opening swing to help keep it from hitting an adjacent wall, so that it can’t be thrown open violently and damage the door, the closer, door handle and the wall. Besides, when emergency escape the defender quickly opens the fire door, also can prevent loses weight and leans forward to the ground. There is also a situation in which people are overwhelmed and exert a large reaction force to prevent a huge reaction force from injuring people.

2-3. Delay Action of door closer- To adjust the delay of door closing from maximum opening, useful on door ways that require the door to stay open for a set amount of time. This allows pedestrians to pass through the open door without having to worry about the door closing on them right away. It is more suitable for occasions where there are many people, especially hospitals, welfare homes, etc., where there are old people, children and disabled people.

2-4. Swing Speed - To adjustment controls how fast the door closer from fully open to within about fifteen degrees of closed. It can be used on different doors with a wide range of door weights and door widths, as well as places with high door closing resistance due to environmental reasons. Steeples adjustment can achieve satisfactory closing force, especially in coastal cities, vehicles and ships, etc., which are affected by wind and close the door resistance (force of the door).

2-5. Damping reset function Temporary closing performance (vertical door closer) - When opening any angle, closing the speed control valve should temporarily suspend the damping reset function.

2-6. Safe and fast super-damping closing performance (vertical door closer) - sudden application of external force during the closing of any angle should be able to close safely and quickly.

2-7. Use environment: Fire protection requirements and anti-freeze requirements for locations under minus 45° in winter.

     Fire doors must be fitted with door closer. Door closers for fire doors are required to comply with ANSI or EN fire standards. D&D door closers are tested by BS EN 1154:1997.

For low temperature environments, the door closer needs to be added with antifreeze oil.

 

2-8.  Choose according to location. For example, for applications where there is a high demand for appearance, a hidden door closer is required.

 

The above is the selection point of the door closer. Hardware products are small in size, but because hardware products are closely related to fire prevention, escape, security, management, and energy conservation of buildings, once the design or installation of a moving object is unreasonable, it will bring inconvenience to the actual usage for the future.

Building door control hardware product is an integral part of any building. Because of the special properties and frequent usage of hardware products, the reasonable selection of hardware configuration solutions and hardware products can not only extend the service life of the products, but also fully utilizes their functions, facilitate people's use, and effectively ensure the overall safety of the building. Fire protection requirements, improve the architectural decoration effect, and make property management more effective. High standard door controlled hardware products are both quality and versatile. D&D hardware passes strict safety tests  (including BS EN, CE, UL, ANSI and BHMA) adapts to different fields such as public buildings and industrial sites, and will further customize a more complete integrated door control hardware solution to users.

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Email: David@dndhardware.com, sales@dndhardware.com

 

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