Overhead rack-and-pinion door closer with closing delay - EN 1154 A - for single-action doors up to 1400 mm wide - suitable for smoke and fire doors (use mounting plate). It features an adjustable closing force in size range 1 - 6, an optical size indicator, and adjustable opening damping. The thermostabilised closing speed allows for all functions to be adjustable from the front, with end position adjustment via linkage. It includes a safety valve in both opening and closing directions, and is compatible with right and left hinged doors without conversion. Additional technical features: supplement without linkage.