Corbin Russwin's history combines high-quality product and innovative design. That tradition continues with the Grade 1 DC6000 Series door closer, designed and engineered with quality features such as captured valves and a complete range of arms. The DC6000 series is the perfect closer for high-use openings or openings that must meet ADA requirements such as schools, office buildings, healthcare facilities and retail complexes. The design of the DC6000 Series incorporates internal advantages engineered to provide consistent quality operation. Double O-rings, a robust spring tube design and captured valves ensure longevity. These closers exceed 16 million cycles ensuring dependability and long life. The parallel arm mounting allows the inside application of closer on out-swinging doors. Closer is mounted on the push side, with the arm parallel to the face of the door. The closer arm does not project from the opening.