LCN 4040SE-0801 Surface-Mounted Hydraulic Door Closer with Integrated Electronic Hold-Open for Fire Safety

The LCN 4040SE-0801 employs a high-grade hydraulic system encased within a robust cast iron body, engineered for precise and consistent door control. The internal hydraulic fluid, combined with independently adjustable valves for both closing and latching speeds, allows for meticulous calibration of the door's entire operational cycle. The separate closing speed valve precisely controls the sweep motion from maximum opening (up to 110 degrees) to approximately the last 15 degrees of closing, while the latching speed valve fine-tunes the final closing force, ensuring full latch engagement without unnecessary impact. The integrated hydraulic back-check, a crucial safety feature, provides a cushioning effect against abusive or rapid door opening beyond 70 degrees, protecting the door, frame, and associated hardware from potential damage. The utilization of a forged steel track arm (SE Track) further enhances mechanical integrity, distributing closing forces efficiently and contributing to the closer's overall durability and smooth operation, critical for doors up to ~1219mm width. A distinguishing engineering aspect of the 4040SE-0801 is its integrated electronic hold-open function, specifically designed for use on fire/smoke barrier doors. This mechanism is directly interlinked with a building's fire alarm system or dedicated smoke detectors. Under normal conditions, it maintains the door in an open position for convenience and traffic flow. Crucially, upon the activation of a fire alarm or loss of system power, the electronic circuit instantly disengages, allowing the calibrated hydraulic closer to immediately and reliably close the fire door. This critical safety feature ensures compartmentalization in the event of a fire, preventing the unchecked spread of smoke and flames. Its compliance with UL10C (Positive Pressure Fire Tests of Door Assemblies) and NFPA 101 (Life Safety Code) is a testament to its stringent design and testing for fire resistance and life safety performance. Furthermore, the unit's certification to ANSI/BHMA A156.15 signifies its adherence to rigorous performance standards for door closer reliability, operational endurance, and safety in daily use, while its ADA compliance ensures accessible operation for all users. The robust cast iron body with a durable powder coat finish and the forged steel arm contribute to exceptional corrosion resistance and an extended service life under demanding interior conditions.