The Dormakaba TS73 hydraulic door closer operates on a principle of controlled fluid displacement within a sealed steel body, finished with an anti-corrosion treatment. Its core mechanism integrates a rack-and-pinion system, where the mechanical motion of the door opening compresses hydraulic fluid. During the closing cycle, this fluid is metered through internal orifices, directly controlling the door's velocity. The defining technical aspect is its adjustable EN2-4 power size. This allows for precise calibration of the closing force to match varying door leaf dimensions (up to 1100mm width) and weights, ensuring compliant operation with accessibility and safety requirements for standard and commercial applications. The `closing_speed_control: yes` feature indicates a dedicated, adjustable hydraulic valve to regulate the sweep speed from the fully open position to approximately 10-15 degrees before closure. While `latching_speed_control` is listed as N/A, the overall closing speed adjustment significantly impacts the final latching phase, requiring careful setup to achieve secure closure without undue force. The non-handed design simplifies installation logistics, allowing universal application without specific left or right-hand ordering. Constructed from steel, the unit benefits from an anti-corrosion finish, enhancing its longevity and operational integrity in diverse environmental conditions. It is critical to note the explicit declaration `fire_rated: false` in the specifications. This means the Dormakaba TS73 is not certified for use on fire-rated door assemblies and thus cannot contribute to fire compartmentation strategies. Furthermore, the absence of `back_check` functionality means there is no hydraulic damping to cushion the door's opening swing, which could be a consideration in high-traffic or wind-prone areas. Similarly, `hold_open_function: false` and `delayed_action: false` indicate a straightforward, continuous closing cycle without these common convenience features. The ISO 9001 certification pertains to the quality management system under which the product is manufactured, underscoring production consistency rather than specific product performance against standards like EN 1154 for all categories of door closers.
