Usage
The Dorma double action upper arm is designed for use with concealed RTS 85 door closers, enabling controlled two-way swinging operation in aluminum, wood, or glass doors where an unobtrusive closing mechanism is required.
Advantages
- Ensures smooth and reliable double action (bi-directional) door movement.
- Suitable for integration in various door types including aluminum and glass constructions.
- Keeps the closer mechanism fully concealed for a clean architectural appearance.
- Compatible with fire and smoke protection doors when used with appropriate closers.
- Simplifies retrofitting or new installation without visible alterations to the doorway structure.
Specifications
- Constructed from robust steel or aluminum components for high durability and consistent performance over time.
- Satisfies EN1154 standard requirements when installed with matching Dorma RTS series closers, supporting certified fire and smoke resistance features depending on the complete assembly.
- Accommodates single-leaf doors up to approximately 1100 mm in width; supports large opening angles—typically up to about 130°, depending on installation context.
- The design allows adjustable closing speed settings through regulating valves present on compatible Dorma closers; non-handed configuration enables use on left- or right-swinging doors.
How it works
This upper arm connects to a Dorma RTS concealed closer installed within the door frame. As the door opens in either direction, the arm transmits force between door leaf and closer body, controlling closing speed while remaining hidden from view for seamless aesthetics.
