Ryobi 4550 series is a versatile commercial door closer and the top closer in the Ryobi range.
- Fire rated
- Power adjustable from 2 - 7 strengths. This allows adjustments with the one closer to take door weights between 45kg up to 230kg.
- Pre set at a factory 4 setting (80kg)
- A built in delayed action feature that works from an opening of 180 degrees to 70 degrees, stays open at 70 degrees for a short period to allow access and then proceeds at normal speed to closing.
- Suitable for standard and parallel arm fixing options in the one box
- Non handed
- Supplied with adjustable closing and latching speeds
- Supplied with an adjustable backcheck feature
- Hold open function arm is a seperate part, if required (same as 3550) but be aware that using the hold open function doesn't allow it to be fitted to a fire door
- Contains all season fluid to eliminate the need for seasonal adjustment
- When using the parallel arm model the door weight capacity is reduced by 20% compared to the standard arm application
- Available in finish of silver only