Dormakaba (Stanley) QDC100 Series Extra Heavy Duty, Grade 1 Door Closer

We designed and engineered the QDC100 series with ultimate durability and versatility in mind. With cast iron construction, retrofit-compatible features, and a wide array of options, the Dormakaba Commercial Hardware QDC100 closers offer peak performance in the toughest applications over the long term. Fully adjustable from 1 - 6 allowing for maximum flexibility. All-weather fluid ensures optimal operational performance in multiple climate conditions. Delayed action and backcheck are standard in the same door closer body. Stacked valves prevent oil leaks from screws being backed out too far. UL/cUL listed (3 hour) for self closing.