This standard applies to air locks for conveyors in mine excavation. They regulate the air within the region of conveyors. They are part of the air locks and are assembled in the air lock frame.
DIN 21636:2003 history
2016DIN 21636:2016-09 Air regulation systems for mining - Belt-conveyors-way air locks - Dimensions, identifications, requirements and testing
2016DIN 21636:2016 Air regulation systems for mining - Belt-conveyors-way air locks - Dimensions, identifications, requirements and testing
2003DIN 21636:2003 Air regulation systems in mining - Belt-conveyors-way air locks - Dimensions, identifications, requirements and testing