Ultraflex Group

Ultraflex Group Guide to select the Actuator

Guide to select the Actuator

Ultraflex Control Systems proposes a complete line of electric chain and linear actuators, that allows the choice of the more suitable actuator for every kind of requirement.
The following technical details are a valid support to this choice that must be effected considering the following elements:



Bottom hinged windows (hinges on the bottom side, inside opening): chain actuators installation is recommended because
they do not take up space inside the room and are aesthetically discreet.
Moreover, for these kind of installations, are not usually required special protection class for water or powder. The installation of linear actuators would need very long brackets (not available). For windows wider than 1,5 m we suggest to install actuators with two thrust points.

Top hinged windows (hinges on the top side, outside opening): it is recommended the installation of actuators with a special
protection class and enough powerful to support with sufficient rigidity the maximum load that occurs when the window is completely opened.
We suggest actuators like Quasar, Twin Quasar, Vega, Twin Vega, Supermaster or Stilewith double link chains.
It is possible to install also linear or rack actuators, considering their encumbrance, the rotation of actuator’s body and aesthetic effect. For window wider than 1,5 mm we suggest to install actuators with two thrust points, rack systems connected
by connecting rod, or two actuators with control coupling unit.
Roof windows (skylights,domes, etc.): see the installation instructions for top hinged windows. The hinges can be on one of the two horizontal sides or on the two vertical sides (central rotation axis). In that case it has to be considered as height of the window, the distance between the hinges and the fixing point of the actuator; besides, consider weight as zero if window is not equipped with brakes.
Horizontal pivoting windows: see the installation instructions for top or bottom hinged windows and bottom hinged windows according to actuator fixing position on the pivoting window. In the calculation of the opening and closing effort it is necessary to consider the height of the window as a distance between the fixing position of the actuator and the rotation point of the window, in order to avoid an extreme bending of the chain. Besides, consider weight as zero if window is not equipped with brakes.
Louvres or sun blades windows: it is necessary to specify the control level stroke for their movement and the necessary force to apply on it. After this choose an adequate rack/spindle actuator (Ulysses, Max, Rack). In case the actuator is installed exposed to bad weather conditions we suggest to contat our technical department.
Normal turn window with hinges on the vertical sides and inside or outside opening: it is necessary to install a chain actuator
on the vertical side (with the same kind of brackets for bottom and top application), considering the right installation way of the chain: it doesn’t have to be bent because of the gravity force to choose the adequate stroke and brackets. For choosing the adequate stroke and brackets consider as “height” of the window the distance between the hinges and the fixing point of the actuator.
Parallel Windows (outside parallel opening): it is required the installation of at least two chain actuators with speed synchronization, in order to keep the sash parallel to the frame. For window sides wider than 1,5 m we suggest to install two actuators per side or the installation of the locking drive E-Lock connected to the internal multilocking hardware. We suggest to install Synchro Vega chain actuators because of their small size, eventually integrated inside of the curtain wall profiles, having stroke suitable to the max opening of the parallel hinges.



The necessity of a wide window opening contrasts with the following factors:
a) for a chain actuator, if it is not used the pivoting brackets kit, the stroke must not exceed 1/3 of the window height, otherwise the chain bending would cause a loss of rigidity and for this reason a loss of performance in the long run. In case of vents with four-bar hinges please contact our Technical Dpt.
b) for a linear actuator it is necessary to consider the actuator encumbrance inside the room; aesthetic effect apart, it grows as much as the required stroke increases, and it must be considered also the actuator rotation angle. In order to avoid interferences of the actuator with the elements in the room, it is necessary to evaluate carefully the position of the rotation axis opportunely choosing and positioning the fixing brackets. For this purpose, UCS proposes for all the linear actuators side fixing brackets, sliding within the proper dovetail slide on the actuator.