In the correct view of Chinas development prospects, we will also consider the fire safety issues in these public facilities. Once the fires in the public areas cannot be controlled, the fire will spread quickly. This is unbearable for the people! The…
There must be a lot of dust falling on the side of the door of the fire door closer. If it is a long time, it will form very difficult dust, which will make the door closer switch very insensitive, and even form a severe phenomenon that cannot be swit…
The specifications of the door closers for wood fire doors, steel wood fire doors and steel fire doors can be unified according to the original steel fire door standards. The door models with strip glass and those without strip glass doors are the sam…
The door closer relies on the throttling of the fluid in its internal hydraulic system to control the closing process. The oil leakage means the failure of the hydraulic system, so the hydraulic system is the only criterion that determines the life of…
