LCN 4631-3971 Automatic Door O...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2,955.96
$2,152.62
LCN 4631-3971 4630 Series Cylinder Only

LCN 4631-3971 Automatic Door Operator with Digital Control and Cast Iron Construction

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Model: 4631-3971-AL
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$2,955.96
$2,152.62
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LCN 4630 Series Automatic Door Operator with Digital Control and Cast Iron Construction

Professional Automatic Door Opening Solution

The LCN 4630 Series automatic door operator cylinder is designed for manually opening applications that sometimes require automatic opening functionality. This Grade 1 certified operator features a cast iron body with 1-1/2" diameter piston and 3/4" diameter double heat treated pinion journal for commercial durability. UL and cUL listed with ANSI/BHMA 156.19 compliance and ADA accessibility requirements, backed by a 2-year limited warranty.

Professional Features & Benefits

  • Heavy-Duty Construction: Cast iron body with 1-1/2" diameter piston and 3/4" diameter double heat treated pinion journal provides exceptional durability for commercial applications.
  • Digital Control System: On-board digital control box with factory default memory enables fast and accurate operational adjustments for customized performance.
  • No-Destruct Drive System: Advanced drive mechanism resists damage from manual operation and provides reliable long-term performance in high-traffic environments.
  • Grade 1 Certifications: ANSI/BHMA 156.19, UL 10C, UL 325/228 listed with 100 hour salt spray testing for demanding commercial applications.
  • ADA Compliance: Meets American Disabilities Act and ANSI A117.1 requirements for accessibility, ideal for multi-door applications serving elderly and disabled users.
  • Simplified Installation: Plug-and-play connections install without guard rails or safety mats, includes wood and machine screws for surface mounting on top jamb pull side.
  • All-Weather Operation: All weather fluid ensures consistent performance across temperature variations for reliable year-round operation.
  • Manufacturer Warranty: 2-year limited warranty provides added confidence and protection for commercial installations.

Technical Specifications

  • Closer Size: 1
  • Closer Size: 2
  • Closer Size: 3
  • Closer Size: 4
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Finish Type: Powder Coat
  • Hold Open Feature: Yes
  • Mounting Detail: Surface - Top Jamb (Pull Side)
  • Mounting Location: Pull Side
  • Mounting Method: Surface Mount
  • Product Category: Door Controls
  • Product Group: Door Controls
  • Product Subgroup: Parts and Accessories
  • Product Substrate: Iron
  • Product Type: Door Controls
  • Series: 4630 Series
  • Subcategory: Parts and Accessories
  • Warranty: 2 Year

Professional Applications

  • Commercial Building Accessibility Compliance
  • Healthcare Facility Patient Access
  • Educational Institution ADA Requirements
  • Multi-Tenant Residential Properties
  • Retail Establishment Customer Access
  • Government and Municipal Buildings
  • Industrial Facility Personnel Access

Why Choose LCN Quality?

LCN automatic door operators deliver professional-grade reliability with cast iron construction and comprehensive Grade 1 certifications including UL listing and ADA compliance. The 2-year limited warranty and no-destruct drive system ensure dependable performance in demanding commercial applications. Engineered with digital control technology and all-weather fluid for consistent operation where accessibility and reliability are essential.

Product Specs

Series:
4630 Series
Mounting Detail:
Surface - Top Jamb (Pull Side)
Warranty:
2 Year
Closer Size:
1
Mounting Location:
Pull Side
Subcategory:
Parts and Accessories
Product Group:
Door Controls
Product Subgroup:
Parts and Accessories
Product Type:
Power Operators - Electromechanical
Finish Type:
Powder Coat
Commercial/Residential:
Commercial
Closer Size:
2
Closer Size:
3
Closer Size:
4
Hold Open Feature:
Yes
Mounting Method:
Surface Mount
Product Substrate:
Iron
Product Category:
Door Controls
Department:
Door Hardware

LCN 4631-3971-AL – Frequently Asked Questions

1) Is the LCN 4631-3971 a complete automatic door operator or just the cylinder?
The 4631-3971 is the 4630 Series operator cylinder itself, not a packaged full operator assembly. It is the cast iron power unit with the 1-1/2 inch diameter piston and 3/4 inch double heat treated pinion journal, plus the on-board digital control box. If you are replacing a failed 4630 power unit on an existing opening and reusing the arm and covers already on the door, this is the piece you want. If you are building a brand new automatic opening from nothing, plan on the arm package and cover for that opening as well.
2) Where does the LCN 4630 Series operator mount on the door?
Top jamb, pull side, surface mounted. That means the operator body goes on the frame face above the door on the side the door pulls toward, and the arm reaches down to the door. It is not a concealed-in-header unit and it is not a push side or regular arm mount, so if your opening only gives you push side frame face, the 4630 in this configuration is the wrong approach. Wood and machine screws for that surface mount come with it.
3) Can the LCN 4630 operator be adjusted for different door sizes and weights?
Yes, it covers closer sizes 1 through 4, which is the normal spread from a light interior door up to a heavier full-size commercial exterior door. Adjustment is done through the on-board digital control box rather than by swapping the unit, and the box carries a factory default memory so you can return to a known starting point if a field adjustment goes wrong. All weather fluid inside means the closing behaviour holds up through seasonal temperature swings on an exterior opening.
4) Does an LCN 4630 automatic operator need guard rails or safety mats to be installed?
No. The 4630 installs with plug-and-play connections and without guard rails or safety mats, which is the practical difference between a low energy operator and a full power automatic. That keeps the footprint small in a corridor or a vestibule where you have no room for guarding, and it is why these go into healthcare, school, and multi-tenant entrances where the swing has to open slowly enough to be safe on its own.
5) Does the LCN 4630 Series operator meet ADA requirements for accessible entrances?
It meets the Americans with Disabilities Act and ANSI A117.1 accessibility requirements, and it is certified to ANSI/BHMA 156.19, which is the standard that governs power assist and low energy power operated doors. It is also UL 10C and UL 325/228 listed. Those are the four line items a facilities or institutional buyer normally has to produce when an accessible entrance is being signed off.
6) Will an LCN 4630 operator still work as a normal door closer if the power goes out?
Yes. It is built for manually opening applications that sometimes need automatic opening, so the default state is a door that a person pushes or pulls, with powered opening on top of that. The no-destruct drive resists damage from someone manually forcing the door, which is exactly what happens when the actuator is dead and people just shove it open. Hold open is also available on the unit.
7) Is the LCN 4630 operator suitable for a high traffic commercial entrance or is it a residential unit?
Commercial, and specifically graded for it. The body is cast iron rather than aluminum, the pinion journal is double heat treated, and the certifications are Grade 1. For a property manager standardizing a building, that combination is what carries a main entrance or a corridor door that cycles all day. It is not sold as a residential product.
8) How do I choose between a low energy automatic operator and a full power automatic door?
A low energy unit like the 4630 opens slowly enough that it does not require guard rails or safety mats, and it stays usable as a manual door when nobody presses the actuator. A full power automatic opens fast, needs sensors and guarding, and is aimed at openings where nobody is expected to touch the door at all. For an ADA entrance on an existing manual door in an office, clinic, school, or apartment lobby, the low energy route is the normal answer and is far less work in an existing frame. LCN publishes a selection chart and an automatic operator catalog section covering the alternatives across the line.
9) What finish does the LCN 4631-3971 operator come in?
689 aluminum, applied as a powder coat, and that is the only finish this one is built in. The powder coat is validated to 100 hour salt spray, which is what matters if the operator sits on an exterior entrance or under a canopy that gets wind-driven rain. If the rest of your door hardware is a plated architectural finish, be aware you are matching against a painted aluminum-colour unit here.
10) Where do I get the mounting template for an LCN 4630 operator before I drill the frame?
LCN publishes a templates and instructions index covering its closers and automatic operators, and that is where the 4630 top jamb pull side template comes from. Pull it before you drill, because the operator lands on the frame face above the door and the hole pattern has to clear the stop and the existing closer prep if one is there. ZenSupply hosts that index along with the 4630 catalog section.
How fast can I get the LCN 4631-3971-AL delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the LCN 4631-3971-AL come with a warranty?
Absolutely. The LCN 4631-3971-AL is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the LCN 4631-3971-AL?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the LCN 4631-3971-AL from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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