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LCN 4642-3971 4640 Series Cylinder Closer Only – Heavy-Duty Commercial Door Closer Body
The LCN 4642-3971 4640 Series Cylinder Closer Only is a high-performance, heavy-duty door closer body designed for demanding commercial and institutional applications. Built for reliability and long service life, this closer cylinder delivers smooth, controlled door operation in high-traffic environments such as schools, hospitals, office buildings, and government facilities.
Part of the trusted LCN 4640 Series, this closer body is engineered to work with compatible arms and tracks (sold separately), making it an ideal replacement or component for custom door closer configurations. Its robust construction helps ensure consistent closing force, improved door control, and reduced wear over time.
Perfect for maintenance professionals and installers, the LCN 4642-3971 cylinder only closer allows for flexible field pairing while maintaining LCN’s reputation for quality and performance.
Key Features:
-
Genuine LCN 4640 Series door closer cylinder
-
Cylinder/body only (arms and accessories not included)
-
Designed for heavy-duty commercial use
-
Ideal for replacement or system customization
-
Trusted LCN durability and performance
Applications: Commercial doors, institutional facilities, high-traffic openings
Manufacturer Resources
LCN Full Line Catalog
Product Specs
- Series:
- 4640 Series
- Warranty:
- 2 Year
- Subcategory:
- Parts and Accessories
- Product Group:
- Door Controls
- Product Subgroup:
- Parts and Accessories
- Product Type:
- Closer
- Commercial/Residential:
- Commercial
- Product Category:
- Door Controls
- Department:
- Door Hardware
LCN 4642-3971-AL – Frequently Asked Questions
1) What is the LCN 4642/3971/4640 series cylinder closer designed for?
This cylinder closer is designed for heavy-duty commercial door applications. It provides controlled closing force for doors up to specific weight limits. The closer only unit requires separate arm and bracket components for complete installation.
2) What door weights and widths are compatible with this closer?
Verify door specifications against manufacturer requirements. Most LCN closers in this series handle doors up to 150-200 pounds. Door width capacity varies by model. Check the manufacturer template for exact compatibility with your door dimensions.
3) Does this closer work for both right and left hand doors?
Most LCN cylinder closers are universal for handing when properly configured with arms. The closer body typically mounts the same way. The arm selection and mounting determines final hand compatibility. Verify handing requirements during installation planning.
4) What finish options are available for this closer series?
LCN typically offers standard finishes like aluminum, bronze, and painted options. Specific finish availability varies by model number. Check product specifications for exact finish codes. Match closer finish to other door hardware for consistent appearance.
5) What closing force and speed adjustments does this closer provide?
The closer includes adjustable closing speed and latching speed controls. Most models provide separate adjustment valves for sweep speed and latch speed. Some include backcheck adjustment. Use manufacturer recommended settings as starting point for field adjustments.
6) Does this closer meet ADA and building code requirements?
LCN closers typically meet ADA requirements when properly adjusted. Opening force should not exceed 5 pounds. Closing time must allow adequate passage time. Verify local building code requirements and adjust closer accordingly during installation.
7) What additional components are needed with this closer only unit?
You need compatible arms and brackets for complete installation. Arm selection depends on door type and mounting requirements. Standard, hold-open, and parallel arms are common options. Check LCN arm compatibility charts for proper component selection.
8) How is this closer typically mounted on the door frame?
The closer mounts to the door frame header using the manufacturer template. Standard top jamb mounting is most common. Ensure adequate clearance above door for closer body and arm operation. Use proper fasteners for frame material and load requirements.
9) How do you maintain and service this door closer?
Regular maintenance includes checking adjustment settings and inspecting for fluid leaks. Clean closer body and arm connections periodically. Adjustment valves may need seasonal tuning for temperature changes. Replace worn arms or seals when performance degrades.
10) What other LCN closer models are similar to this series?
Related LCN models include other 4000 series closers with similar capacity ratings. The specific model differences typically involve mounting options or adjustment features. Consult LCN product guides to identify suitable substitutes or upgrades for your application.
11) Can this closer handle exterior door applications?
Many LCN closers handle exterior applications when properly specified. Consider temperature range, weather exposure, and finish durability. Exterior installations may require different adjustment settings for seasonal temperature variations. Verify environmental ratings for your climate conditions.
How fast can I get the LCN 4642-3971-AL delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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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 4642-3971-AL come with a warranty?
Absolutely. The LCN 4642-3971-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 4642-3971-AL?
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Why buy the LCN 4642-3971-AL from ZenSupply?
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