Japan NEWSTAR SF-250/SF-350F aligner

stripped of Party membership and expelled from public office door （ fire-proof door ）It is an overlapping structure, and can only be closed normally in order when opening and closing. In case of fire, pass Door closer or Floor spring It is automatically closed by operating together with heat or smoke sensitive devices. The sequencer can perform this important task to ensure the correct closing sequence.

SF-250/SF-350F
working principle
Please refer to the bottom view: if the second door is closed first, the adjusted control rod will hold the second door. When the front door is in place, its outer edge will touch the control rod, pushing the control rod into the frame. This control ensures that no matter which door is closed first, the closing sequence will be adjusted later according to the principle and mechanism of the product.

Installation instructions
Align the center of the control rod support shaft with the center of the door closing clearance.
The mounting base shall be attached to the lower edge of the upper crossbeam of the door frame. The angle of the mounting base shall be flush with the angle of the crossbeam. The crossbeam itself shall be at least 25mm wide, the inner plate shall be 200mm long, and the thickness shall be at least 4.5mm. It shall be attached to the lower edge of the crossbeam first.