RYOBI 4550 D-4550 BLACK BC/DA UNIV_ARM EN_2-7+ Tensioner

Description RYOBI 4550 D-4550 BLACK BC/DA UNIV_ARM EN_2-7+ Tensioner

● RYOBI® door closer, 4550 series, model D-4550 UNIV (Japan), surface-mounted type - designed to control large exterior and interior doors;
● Has internal spring tension adjustment (closer class), which allows you to use a single closer model for different door classes. Also makes it easier to adjust the closing force of the closer without changing its position on the door;
● Possible installation from the door closing side on the door leaf using a parallel pull bracket (1-6+ class);
● Fully controls the entire door closing cycle with separately adjustable speeds of the initial and final closing (slamming);
● Has an adjustable BackCheck function (wind brake), which delays the opening of the door after an angle of 70-80°, which avoids damage to the door, fittings, walls;
● Has an adjustable DelayAction function (closing brake), which operates at large door opening angles, slowing the door, allowing people with limited mobility to pass through or to carry loads;
● The housing is made using high-pressure aluminum casting technology;
● Decorative plastic cover included;
● The internal mechanism is of the rack and pinion type (Rack&Pinion), mounted on high-quality ball bearings;
● Finishing color - black paint;
● The closer is adjustable in the range of 2-7+ classes according to EN1154. The default factory setting is class 3 with standard traction;
● When installed with parallel traction, it is adjustable in the range of 1-6 classes;
● The ability to use in fire doors with a fire resistance limit of 60 minutes;
● Adjustment of the initial and final closing speeds;
● Service life of 2,000,000 cycles.