The document applies to air locks in level and inclined mine excavations. In addition to the definition of different terms the safety requirements to the installation and operation of air locks are defined.
DIN 21635:1998 history
2016DIN 21635:2016-09 Air regulation systems in mining - Air locks - Building and operation
2016DIN 21635:2016 Air regulation systems in mining - Air locks - Building and operation
1998DIN 21635:1998 Air regulation systems in mining - Air locks - Building and operation