DORMA 8900 Series door closerHeavy-Duty Surface Applied Door CloserThe 8900 door closer series designed to provide a highly flexible door control system suitable for institutional or high-traffic commercial applications. Its hydraulic control system features a full range spring power adjustment and backcheck, along with a narrow projection full cover and flatform style arm.Door closer ANSI/BHMA Grade 1 certified.Long term performanceAdjustable spring sizes and powerMeets barrier-free requirementsAdjustable backcheckBacked by 25 year warrantyProduct detailsFeaturesControlled opening with backcheck featureThe 8900 Series hydraulic backcheck feature protects doors and their adjacent structures. Its valve adjustment regulates backcheck intensity. In addition, a backcheck positioning adjustment for parallel arm applications provides a consistent range similar to regular and top jamb applications.Long term performanceThe 8900 Series heavy-duty, 10 million cycle closers represent the latest in door control technology, combining over a quarter century of proven performance with its hydraulic control system and modern architecturally styled aesthetics. It results in the perfect combination of durability, reliability, and appearance.Barrier-freeThe 8900 Series, with the fully adjustable spring, also meets barrier-free accessibility requirements.Product downloadsArchitectural documentsInstruction sheetsTechnical BrochureTechnical drawings CAD PDF