Door closer correct adjustment method and common problems
Door closer correct adjustment method
1, Almost all door closers have a closing speed and latch speed two levels of adjustable features. Latching speed is adjusted according to the hardness of the latch to both locks the active fan and not produce an unnecessary impact on the door frame. And the whole adjustment of the closing speed is not affected by the closing speed.
2, For the building exterior doors, opening damping is a very important feature. Because the door closer not only to prevent people's large thrust to make the active fan over open, more importantly, to prevent the active fan in the generation of open if encountered strong wind over open will lead to door damage, in general, only high-grade door closers have this function.
3, Hysteresis closing is a special function, the purpose is to make the active fan in the open position to stay for a period of time and then close the door, this function is very important in the occasion of children and the elderly through.
4, The adjustable closing force is a sign of a high-grade door closer's significance, high-grade door closers can accurately adjust the level of closing force. The closing force is usually specific to a particular model of door closer, but sometimes the closing force can change. For example, in the winter when the wind is strong, exterior doors may need to have a greater closing force, while in the summer when the wind is low, the closing force may need to be smaller, making it easier for people to open the movable fan.
5, Movable door fan stop open is also an important function, but fire doors and other special devices can never be set to stop open function.
Door closer use common problems
1, Installation screws loose or lost, resulting in the door closer is not in the correct installation position, connecting arm damage.
2, The door closer to close the buffer effect becomes poor, resulting in the door and the door frame between the impact, the door body deformation.
① From the structural point of view, the door closer is a closed whole, from the appearance of the basic can not see its quality as good or bad.
② the most critical quality issue of the door closer is whether oil leakage because the door closer is dependent on its internal hydraulic system in the throttling of fluid to achieve control of the closing process, oil leakage means the failure of the hydraulic system, so the hydraulic system is the only criterion to determine the service life of the door closer.
③The most important reason for oil leakage is that the pinion support guide wears to increase the gap, the seal ring wears to cause a decline in sealing effect or the throttle spool rotates counterclockwise away from the valve body when the buffer effect is adjusted.
④ The reduction of the buffer effect of the door closer is caused by the entry of air due to oil leakage or the increase of the clearance between the guiding surface of the rack plunger and the valve body (throttling). Therefore, the quality and precision of the material, heat treatment and machining of the pinion, and support guide parts are very important.
⑤ For the poor buffer effect of the door closer, throttling by adjusting the throttle spool alone is not a fundamental solution. If the oil leakage is at the support guide, remove the support guide, check the condition of the seal, such as worn or aging failure, and replace the seal. If the gap between the support guide and pinion shaft is too large, replace the support guide. If the rack plunger guiding plunger surface wear, and the valve body with increased clearance between the throttling effect decreases, can remove the rack plunger, with the surface chrome plating method to repair. In addition, to ensure that the door closer cushioning effect, switching to a softer spring, is also a way to reduce the impact force of the door on the door frame after the cushioning effect becomes worse.
We should consider the weight of the door, the width of the door, the frequency of opening the door and the use of the requirements and use of the environment, and other factors in the selection of door closers.
The weight of the door and the width of the door is the most important factor in selecting the door closer model, common doors are fire doors, wooden doors, aluminum doors, glass doors, steel doors, etc.
Usually, the weight of the door is small, choose the model with less power, and vice versa. And open the door frequency is closely related to the quality of the product factors, for frequent use of the occasion, should require the product sealing performance to be good, long life. Only a reasonable and appropriate choice, in order to give the purchase of a suitable product for their own, to be able to bring the greatest convenience to life.