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Dorma Double Action Upper Arm for RTS 85 per piece
€98.54
In stock
Usage
The Dorma RTS 85 EN 4 concealed door closer with 90° hold-open is designed for interior doors, providing automatic closing functionality while remaining hidden within the door and frame. Ideal for commercial, office, and public building environments seeking clean aesthetics.
Advantages
- Concealed installation offers a clean architectural appearance without visible hardware.
- Durable mechanical design ensures reliable operation over long periods in medium- to high-traffic areas.
- EN 4 closing force supports doors up to approximately 1100 mm wide, making it versatile for most standard doors.
- 90° hold-open feature allows convenient passage or ventilation when needed.
- Suits both left- and right-handed single-action doors; minor adjustment required during installation depending on hand orientation.
Specifications
- Slim housing designed for concealed overhead installation; silver finish (EV1) blends discreetly with most interior designs.
- Tried-and-tested rack-and-pinion technology delivers stable performance and consistent force across a broad temperature range.[2]
- Carries EN1154 certification (size EN4), suitable for fire and smoke protection doors under specific conditions.[5]
- Covers door widths up to approximately 1100 mm; adjustable closing speed, latching speed, and backcheck enhance safety and usability.[5]
How it works
The Dorma RTS 85 is installed discreetly in the overhead section of the door frame or transom. When the door is opened beyond a preset angle (up to 90°), the mechanism engages its hold-open function. Upon release, an internal spring gradually closes the door at a controlled speed based on user adjustments.[6][5]
