Protective Airtight Doors are widely used in modern buildings and facilities in order to meet the requirements of safety protection and tightness. According to different use needs, these protective doors can be classified according to the opening mode, threshold design, etc., to ensure effective function in normal times and special circumstances. Understanding the characteristics and application scenarios of different types of Airtight doors is helpful to select the most appropriate Door type to improve the safety and functionality of buildings.

1)Steel Structure Airtight Door adopts flat type. Divided by the number of Doors, there are Single Leaf Airtight doors and Double Leaf Airtight Doors.

(1) Single Leaf Door is generally used for small personnel entrance and exit.

(2) Double Leaf Door is generally used for larger vehicle entrances and exits.

2) Steel protective airtight doors are divided according to whether there is a threshold at the entrance, and there are three kinds of fixed threshold, active threshold and door drop type.

(1) Fixed threshold series Airtight Door has the advantages of reliable protection and low cost, but because there is a fixed threshold with a height of 150mm at the hole, it is generally used for doors that are not often accessed by personnel.

(2) The cost of the movable threshold series Airtight Door is slightly higher, and its threshold is installed in dangerous times, and can meet the corresponding protection and sealing requirements when dangerous; Usually there is no threshold at the door, to facilitate the passage of personnel and vehicles, but also in line with the requirements of fire evacuation, suitable for use in peacetime personnel, vehicles to enter and exit more doors.

(3) The Door of the landing series Airtight Door can be lifted, and when the door is in the lifting state, the lower edge of the door is slightly higher than the ground plane, and the door can be opened. There is no threshold at the door opening, but a trench for placing door fans is provided on the outside of the threshold place. In order to ensure that the door can meet the protection and sealing requirements when the door is closed, the door is first landed in the gutter outside the threshold, and then the door is locked with a lock. This kind of door has no threshold at ordinary times and in emergency times. When the door is opened, the cover plate is laid on the trench level with the ground plane, and the passage of personnel and vehicles is very convenient. The mechanism of this door is more complex, the cost is high, and it is generally used for the vehicle entrance and exit of the basement of a higher grade.

Through the detailed understanding of the different types and characteristics of Protective Airtight Doors, we can choose the most suitable door type according to the specific use environment and needs. Whether it is single or double Door, fixed threshold or drop door, each type of Airtight Door has its own unique advantages and application scenarios.