Q:What is the main function of the door closers of fire doors?

To ensure that the door in a normally closed state, to avoid instantaneous fire through.

Q:Just bought back, do not know why the rotation of the axis does not move ... no way to install

You first use a screwdriver to adjust the valve on the door above the valve to see if you can turn

Q:Would like to ask what kind of door closers, suitable for hotel works with what?

Closer Burial device in the ground, collectively known as the spring.

Q:Closed door installation method and size

600 series of door closers, with its small size, reasonable structure design, good performance and become a cost-effective door closers, with significant economic. 600 series of door closers are widely used in fire doors, security doors and a variety of decorative doors, as the domestic door closers one of the largest varieties of sales.

Q:How closed the door closer

The speed is too fast is too loose screws, need to adjust the clockwise, you can slowly debug.

Q:What do you need to install a door closer?

Closed door installation method 1, usually with the door closer to provide instructions for the installation of the model, so first read the instructions, according to the direction of the door, the size of the closing force and the door closer, the connection between the seat and the door hinge to determine the installation location. 2, according to the requirements of the size of the closing force, by reversing the connecting seat 180 ° or change the connection between the connecting rod and the connection between the seat position, can change the closing force. Adjust the distance between the connecting rod and the hinge centerline of the door, the smaller the closing force of the door closer, the greater the strength. 3, according to the installation model on the location of the instructions to determine the location of the installation screw, and then drilling, tapping. 4, with a screw to install the door closer. 5, the installation of fixed connector. 6. Install the drive plate with screws. 7, adjust the adjustment lever to the door frame into 90 °, and then connect the connecting rod and drive board connected together. 8, do not forget to install a plastic cover, it can be used to catch the closed door leakage of hydraulic oil. 9, after installation, check the fixed screw is fastened, no loose or not strong phenomenon. Open the door to the maximum door position, check whether the hinge arm of the door closer is rubbed or rubbed against the door or door frame.

Q:What is the difference between concealed door closers and closures?

The main body and the slider of the dark doorcloth are installed in the door or door frame, the door of the material (wooden doors or profiles) and the thickness of the requirements

Q:How to choose the door closers

Select the door closers should consider the factors are: the weight of the door, the width of the door, the door frequency and the use of requirements and the use of the environment. The weight of the door and the width of the door is the most important factor in choosing the door closer model, common doors are fire doors, wooden doors, aluminum doors, glass doors, steel doors and so on. Usually the weight of the door is small, select the smaller model, and vice versa.

Q:Who knows what oil in the closer, trouble tell me about

One, generally 40 # low pour hydraulic oil. Second, the use of door closers requirements and choice Door closer products must meet the national standard GB9305-88, for the use of fire doors closed doors should also meet the GA93-1995 "door lock with fire doors test" requirements. Select the door closers should consider the factors are: the weight of the door, the width of the door, the door frequency and the use of requirements and the use of the environment. The weight of the door and the width of the door is the most important factor in choosing the door closer model, common doors are fire doors, wooden doors, aluminum doors, glass doors, steel doors and so on. Usually the weight of the door is small, select the smaller model, and vice versa. The door frequency is closely related with the product quality factors, the use of frequent occasions, the product should be required to seal the performance is better, long life.

Q:Is it hydraulic? Inside a lot of oil ah?

The door closer is a similar spring-like hydraulic pressure, when the door is opened after the release by compression, the door automatically shut, like the role of the spring door, you can ensure that the door is opened, accurate and timely closure to the initial position