LCN 4510-7351 Smoothee Surface-Mounted Hydraulic Door Closer for Commercial Applications

The LCN 4510-7351 embodies robust engineering principles, meticulously designed for sustained performance in high-traffic commercial settings. At its core, the hydraulic mechanism utilizes a specialized fluid within a cast iron body, precisely regulated by adjustable valves. These valves allow for independent fine-tuning of the closing speed (from full open to approximately 15 degrees) and the latching speed (the final 15 degrees of closing). This precision in fluid dynamics ensures a controlled, consistent closing action, critical for user safety and door longevity. Durability is paramount, evidenced by the cast iron body's inherent strength and the extra-duty forged steel arms, which together contribute to an astounding 10,000,000 cycle test rating. This far exceeds typical commercial requirements, underscoring its long-term reliability. The integrated hydraulic back-check system provides critical protection by generating increasing resistance when the door is aggressively opened beyond a pre-set point, preventing damage to the door, frame, and surrounding structures. Compliance with ANSI/BHMA A156.4 Grade 1 signifies that the LCN 4510-7351 has undergone rigorous, third-party testing for strength, reliability, and functionality under extreme operational conditions, making it suitable for the most demanding applications. Furthermore, its UL Listing confirms compliance with recognized safety standards. While engineered for superior control and durability, it is crucial to acknowledge that this specific model is not fire-rated, nor does it incorporate delayed action or hold-open features, focusing purely on precise, non-interrupted closing control. The adjustable power sizing (1-6) or pre-sized options ensure optimal force output for a wide range of interior door dimensions, promoting accessibility where applicable in accordance with BAA & ADA guidelines.