DIN 21637:2016-09

Mine workers in mines have to be supplied with fresh air. The air flows are guided and controlled by means of air regulation systems. Air doors are openings in these structures that are used for the passage of people (travel way) or for production (haulage tracks). The pressure-relieved air doors according to DIN 21637 offer great advantages in terms of safety, and they are designed in such a way that the effects of rock pressure are compensated for or, by readjusting the fastening lugs, it is ensured that the weather doors remain functional. Pressure relief is achieved by simultaneous opening of the door leaves in opposite directions. The forces resulting from the difference in the air pressures in front of and behind the air door and acting on both door leaves are compensated by a coupling rod. Haulage track doors according to DIN 21637 are primarily used for safe haulage and passenger transport in main lines with locomotive traffic and in lines with overhead monorail traffic. The air doors according to this standard may also be used for travel when taking DIN 21635 into account. The national interests in the preparation of the standard have been represented by the committee NA 060-15-06 AA "Bewetterungsanlagen" ("Mine ventilation systems") at the Section Mining equipment of DIN Standards Committee Mechanical Engineering (NAM). Representatives of the manufacturers and users of mine ventilation systems and of the employers' liability insurance associations were involved in the preparation.