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4000T Series Closers

This surface-mounted heavy-duty closer is designed to reliably control fire and smoke barrier doors.  


Looking for more information? Connect with an Allegion team member for help.


The 4000T Series wall pocket heavy-duty closer is designed for use with an SEM 7850 wall magnet, to control the fire and smoke barrier doors with a maximum swing of 90°. The closer is UL and cUL listed with a standard arm for self-closing doors and boasts a 30-year warranty.

Cast Iron

  Heavy Duty

Surface Mounted

Body Construction

  • Cast iron cylinder with full-complement bearing
  • 1-1/2” diameter piston
  • Double heat-treated steel pinion journal

Quality and Durability

  • All-weather fluid
  • Forged steel arm
  • 30-year warranty


  • Universal non-handed
  • Wood and machine screw pack
  • Sizes 3 or 4
  • Sized cylinders for interior fire/smoke doors to 4’0”
  • Meets ADA requirements
  • UL and cUL listed for self-closing doors
  • Powder coat finish offered in standard colors and/or a large selection of optional custom colors
  • Standard plastic cover; optional handed metal cover available
  • Optional plated finish on metal cover, arm and fasteners
  • Optional SRI primer for installations in corrosive conditions available with powder coat only

The 4000T Series mounts wall pocket mount on hinge pull side with a standard track arm. Visit the 4000T Series catalog pages for mounting details and accessories.

Need Replacement Parts?

Get the resources you need to get in touch with an Allegion team member for LCN replacement parts.


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Did You Know?

Since 1877, LCN has been a leader in delivering safety and security through superior door control and best-in-class customer service. From installation through daily operation, customers can count on LCN.

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As part of Allegion’s family of pioneering brands, LCN benefits from the strength, efficiencies, resources, and integration from a global power. In turn, we pass those advantages on to you.

Allegion helps keep people safe and secure where they live, work and visit. With more than 30 brands sold worldwide, we specialize in security around the doorway and beyond. It’s the power of one.