The ASSA ABLOY DC110-9005's operational integrity stems from its hydraulic rack-and-pinion mechanism, a proven design for controlled door closing. Within the closer's steel body, a piston connected to a rack gear engages with a pinion gear, which in turn is linked to the door's arm assembly. As the door opens, hydraulic fluid is compressed, storing energy. Upon release, this stored energy, regulated by precision-machined adjustable valves, drives the piston to return the door to its closed position. The adjustable valves strategically bypass hydraulic fluid, enabling independent fine-tuning of both the closing speed (from maximum opening angle to the latching point) and the final latching speed (the last few degrees of closing). This hydraulic damping ensures a smooth, consistent closure, preventing slamming and minimizing wear on the door and frame hardware.
EN 1154 compliance is a cornerstone of the DC110-9005's engineering. This European standard meticulously defines performance requirements for controlled door closing devices, encompassing durability, efficiency, and safety. The CE mark signifies that the product meets these stringent directives, particularly in contexts requiring fire resistance. The adjustable power size, EN 2/3/4, directly correlates to EN 1154 classifications for various door masses and widths, ensuring optimal closing force is applied for effective and safe operation. While specific cycle test ratings are not detailed, the EN 1154 certification implicitly verifies the product's long-term durability and operational reliability under repeated use. Its fire-rated status further underscores its engineering for safety-critical installations, ensuring the door closes securely to contain fire and smoke as designed.
The precision of door control offered by the DC110-9005 is paramount. The dual variable speed controls allow for tailored application. A slower closing speed can accommodate high-traffic areas or individuals with mobility challenges, while a distinct, faster latching speed ensures the door firmly engages with the strike, crucial for security and fire containment. The absence of features like back check, hold-open, or delayed action simplifies the mechanism, focusing on direct, reliable closing. The robust steel body and durable Black RAL9005 finish contribute to its industrial-grade service life and resistance to environmental factors, maintaining consistent performance over time.
