A two-leaf upward folding door that is fully balanced by counterweights, the Renlita Series 3200 bi-folding door can be fitted with almost any kind of cladding, including glass. A personnel access door can also be incorporated as part of the bottom leaf of the door.
Get a QuoteThe Renlita Foldaway Series 3200 doors are designed for reliable and fast operation in large openings across diverse applications. Key features include:
The Renlita Foldaway door is architecturally specified as a vertically opening, suitably trussed two-leaf door, hinged horizontally, and is capable of moving in vertical guide channels fixed to each side of the door opening.
Link Arms and Pulley System
The door is connected to suitable counterweights through a medium of flexible steel cable moving over a pulley system fitted to the guide channels.
Link arms are fitted to the upper leaf of the door on each side with one end pivoted on the door and the other end pivoted on the guide channel, so that the door closes upright and when open, folds horizontally under the lintel.
The door is finely counterbalanced and is in constant suspension, and does not slam upwards when opening or crash downwards when closing.
System and Power
Electrically operated doors shall be as above described, but incorporating a 3-phase x 415V continuously-rated drive unit with thermal overload protection, push-button controls and manual chain operation facilities.
Power is transmitted onto a horizontal drive shaft, which in turn activates the drive-slides located at each of the guide channels.
The drive-slides act on the drive-cams installed at each side of the door and are synchronised so that the door operates horizontally level at all times.
