The door shutters of the fire doors will only be used, depending on the demand. For example, if you need to open the door after the active stop performance. Another is if you want to have damping cushioning performance-rapid opening to the positive position after the damping buffer, and the damping buffer strength and category can be based on the application request self-conditioning; This performance is used to avoid the door or lock to hit the wall, or emergency escape to avoid people in the rapid opening of the door weightlessness and forward skew to the ground.
Fire door Device is really a university asked, tailor-made is the most abbreviated specification. In some central to delay the slow closing, the door from the opening of the maximum status of the beginning of the uniform slow closure, can be based on the request to stop stepless conditioning. Suitable for use in the income and expenditure of the frequent and numerous occasions, specifically the hospital, there are old people, Door and channel application of income and expenditure for children and persons with disabilities. The closing strength can be used to be able to apply in the door weight and door width of the category of large differences on the door device, and due to the reasons for the closure of the situation of greater resistance. Casually stepless conditioning can achieve a satisfactory closing strength, specifically used in the seaside will, boat and boat and Frequent changes in the occasion.