Ryobi 4550 Heavy Duty Door Closer

Ryobi D-4550 Series - High End Industrial Door Closer.

Ryobi 4550 series is a versatile commercial door closer and the top closer in the Ryobi range.

Ryobi 4550 Heavy Duty Door Closer

Features include:

• Fire rated
• Power adjustable from 2 - 7 strengths. This allows adjustments with the one closer to take door weights betwen 80kg up to 230kg.
• Pre set at a factory 4 setting
• Suitable for standard and parallel arm fixings with both arms supplied in the box
• Fully adjustable closing and latching speed controls
• Fully adjustable backcheck feature
• Non handed
• 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
• Available in finishes of silver

APPLICATION:

CLOSING POWER ADJUSTMENT

Spring Power adjustable according to door weight and width, 2 through 7. Refer to installation instructions. Factory preset size 3 standard installation.

LATCHING POWER ADJUSTMENT

By changing the position of the frame arm on the foot bracket closing force at the latch can be increased or decreased.This can be achieved with the foot bracket in position.

LOW OPENING RESISTANCE/HIGHER EFFICIENCY

A precise production for every components based on Ryobi's original qualitiy control system realized higher efficiency of almost 80% at the average of all ranges and decreased opening resistance to the lowest for eldery and handicapped persons.

NON-HANDED

D-4550 Series Door Closers can be used on both RH and LH doors for both push side and pull side mountings.

FULL HYDRAULIC CONTROL

Controls the door through the entire opening and closing cycles by providing adjustable backcheck upon opening and adjustable general and latch speed through the closing cycle. 

ADJUSTABLE BACKCHECK

A backcheck feature set and adjusted by an independent valve. When introduced the backcheck stalls the opening of the door around 70 degrees. When doors are violently opened by pedestrians or wind, the backcheck feature reduces the likelihood of damage should contact be made with an adjacent wall or obstacle. For busy doors in public building, schools and colleges this facility protects people and property.

ALL SEASON FLUID

All season fluid eliminates the need for seasonal adjustment.

OPTIONAL HOLD-OPEN/ AVAILABLE SEPERATELY

The non handed, optional hold open arm allows the door to be held open at any angles between 70 and 180 degrees. The cam and bearing type hold open mechanism ensures adequate hold open force by adjustable hold open force.