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LCN 4631GLBLK Electrohydraulic Surface-Mounted Door Closer with Auto Equalizer Technology
The LCN 4631GLBLK is a Grade 1 electrohydraulic surface-mounted door closer from the Auto Equalizer series, engineered for intelligent, accessible automatic door control in commercial applications. Its robust cast iron body and sophisticated electronic control system ensure precise, ADA-compliant operation over 10 million cycles.
Quick Answer
The LCN 4631GLBLK provides intelligent, accessible, and durable automatic door control for high-traffic commercial environments through its electrohydraulic Auto Equalizer system.
✓Grade 1 Certified Electrohydraulic Auto Equalizer
✓ADA & ANSI A156.19 Compliant for Accessibility
✓Proven 10,000,000+ Cycle Durability
✓Non-Handed, Surface-Mounted (Top Jamb Pull Side) Design
✓Integrated Electrohydraulic Back-Check and Hold-Open Functions
The LCN 4631GLBLK is an exceptionally robust and intelligent electrohydraulic door closer, ideal for high-traffic commercial environments prioritizing accessibility and long-term durability. Its Auto Equalizer technology, coupled with Grade 1 certifications, makes it a superior choice for controlled, automatic door operation.
✓ Who Should Buy
- •Facility managers seeking ADA-compliant automatic door control solutions.
- •Architects specifying high-cycle, durable door closers for commercial and institutional projects.
- •Building owners needing reliable, low-maintenance door hardware for heavy-traffic areas.
- •Installers requiring non-handed, surface-mounted closers for wood or metal doors within specified widths.
✕ Who Should Avoid
- •Applications requiring fire-rated door closers.
- •Installations where manual, fine-tuned hydraulic valve adjustments are preferred over automated electronic control.
- •Projects with extremely narrow door widths outside the 914-1219mm range.
Product Overview
The LCN 4631GLBLK is a premium electrohydraulic door closer meticulously engineered for demanding commercial environments requiring automatic door operation and enhanced accessibility. As part of the LCN 4630/4631 Auto Equalizer series, this surface-mounted unit (specifically Top Jamb Pull Side) leverages advanced electrohydraulic technology to manage both closing and latching speeds with exceptional precision. Constructed from a durable cast iron body with a black painted finish, it is designed for wood and metal doors ranging from 914mm to 1219mm in width. Rated as Non-sized 1-4, it dynamically adjusts opening force and closing force to meet ADA requirements, ensuring effortless passage. Key features include an integrated back-check for preventing door and frame damage, and a hold-open function for convenience. While not fire-rated, its Grade 1 ANSI A156.19 and A117.1 certifications, coupled with UL Listing, underscore its robust performance and safety for general commercial applications.
| Brand | lcn |
| Model Name | N/A |
| Category | Door Closer |
| Closer Type | Electrohydraulic |
| Series | 4630 / 4631 Auto Equalizer |
| Model Year | 2018-2026 |
| Country Of Origin | N/A |
| Intended Use | Automatic Door Control / Accessible Entry |
| Suitable For | Commercial Doors |
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Engineering Analysis
The LCN 4631GLBLK represents a significant advancement in commercial door control through its electrohydraulic system. Unlike conventional spring-and-oil hydraulic closers that rely on fixed valve adjustments and a mechanical spring, the electrohydraulic mechanism provides dynamic, adaptive control. This system continuously monitors door position and applies precise hydraulic pressure to manage opening and closing forces. The 'Auto Equalizer' technology ensures that the door's opening force remains consistently low (90 Powered maximum opening angle) to comply with ADA and ANSI A117.1 accessibility standards, irrespective of door weight or external factors. For closing, the electrohydraulic circuit modulates fluid flow to deliver independent, finely tuned control over both the closing speed and the final latching speed, eliminating the need for manual valve adjustments common in less sophisticated units. An integrated back-check function electronically resists abusive door openings beyond a set point, protecting the door and frame from impact. The robust cast iron body provides a stable, highly durable hydraulic reservoir, capable of withstanding the rigors of high-traffic commercial use, evidenced by its exceptional 10,000,000+ cycle test rating. Although the LCN 4631GLBLK is not fire-rated, its UL Listing confirms compliance with stringent safety standards for general door control applications. The Grade 1 classification under ANSI A156.19 further assures its suitability for heavy-duty institutional and commercial installations requiring superior durability and controlled access.
Technical Support & FAQs
Engineering Analysis
The LCN 4631GLBLK represents a significant advancement in commercial door control through its electrohydraulic system. Unlike conventional spring-and-oil hydraulic closers that rely on fixed valve adjustments and a mechanical spring, the electrohydraulic mechanism provides dynamic, adaptive control. This system continuously monitors door position and applies precise hydraulic pressure to manage opening and closing forces. The 'Auto Equalizer' technology ensures that the door's opening force remains consistently low (90 Powered maximum opening angle) to comply with ADA and ANSI A117.1 accessibility standards, irrespective of door weight or external factors. For closing, the electrohydraulic circuit modulates fluid flow to deliver independent, finely tuned control over both the closing speed and the final latching speed, eliminating the need for manual valve adjustments common in less sophisticated units. An integrated back-check function electronically resists abusive door openings beyond a set point, protecting the door and frame from impact. The robust cast iron body provides a stable, highly durable hydraulic reservoir, capable of withstanding the rigors of high-traffic commercial use, evidenced by its exceptional 10,000,000+ cycle test rating. Although the LCN 4631GLBLK is not fire-rated, its UL Listing confirms compliance with stringent safety standards for general door control applications. The Grade 1 classification under ANSI A156.19 further assures its suitability for heavy-duty institutional and commercial installations requiring superior durability and controlled access.