LCN 4040SE-0805 Surface-Mounted Hydraulic Door Closer with Electronic Hold-Open

### Hydraulic Mechanics & Control Precision The LCN 4040SE-0805 employs a sophisticated hydraulic system within its cast iron body, delivering precise and consistent door control. Independent, adjustable valves for both closing speed and latching speed allow for granular customization of the door's arc of travel and its final securement. The hydraulic fluid within the system provides a smooth, regulated resistance, preventing abrupt door movements and ensuring quiet operation. Furthermore, the integrated backcheck function engages at approximately 70 degrees of opening, cushioning the door's swing to protect both the door and surrounding frames from damage caused by excessive force or wind. This system ensures not only controlled closure but also longevity of the door assembly. ### Compliance & Fire Safety Integration Adherence to ANSI/BHMA A156.15 standards signifies the 4040SE-0805's rigorous testing for operational reliability, durability, and safety performance in commercial environments. Crucially, its UL Listing and compliance with NFPA 101 (Life Safety Code) underscore its suitability for fire and smoke barrier doors. The electronic hold-open mechanism, which allows doors to remain open for convenience, is engineered to automatically release the door upon activation of the building's fire alarm system, initiating controlled closure to maintain the integrity of fire compartments. This critical safety integration ensures that in the event of an emergency, fire and smoke containment protocols are immediately enforced without human intervention, making it a cornerstone component of modern fire safety strategies. ### Robust Construction & Performance Constructed with a robust cast iron body and a durable forged steel track arm, the 4040SE-0805 is built for enduring performance in high-traffic settings. The adjustable power size from 1 to 4 allows for field optimization, adapting to various door dimensions and environmental factors. While a specific cycle test rating is not provided, the ANSI/BHMA A156.15 certification implies robust durability testing. The unit's non-handed design simplifies specification and installation, enhancing its versatility across a wide range of interior metal and wood door applications.