Linkage door closer with rack and pinion, DIN left and DIN right usable, closing force via adjusting screw on the side and 2 closing speeds 180°-15° and 15°-0° adjustable via valves from the front, latching action is continuously adjusted via the linkage BCÖD+DCSV version with self-regulating backcheck and additional Closing delay in the range from 105° to 70° Installation types: Door leaf installation - hinge side transom installation - opposite hinge side without rods