Falcon KR4023 Key Removable St...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,124.00
$1,040.66
Falcon KR4023 - Key Removable Steel Mullion For 25/24/19 Rim Devices

Falcon KR4023 Key Removable Steel Mullion for 25/24/19 Series Rim Exit Devices

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Model: KR4023 7FT2IN US28
$1,124.00
$1,040.66
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,124.00
$1,040.66
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Falcon KR4023 Key Removable Steel Mullion for 25/24/19 Series Rim Exit Devices

Professional Removable Mullion Solution for Double Door Applications

The Falcon KR4023 Key Removable Steel Mullion is engineered for use with 25/24/19 Series rim exit devices on double door openings. This professional-grade mullion system provides increased security and tighter closure while minimizing door warpage and sag. The key removable design allows for easy removal and reinstallation to provide full width access when needed, while regulating normal in-and-out traffic flow.

Professional Features & Benefits

  • Series Compatibility: Designed specifically for 25/24/19 Series rim devices for reliable integration with existing exit hardware.
  • Key Removable Design: Easily removed and reinstalled for full width access while maintaining security when in place.
  • Heavy-Duty Steel Construction: Durable steel construction provides long-term reliability in high-traffic commercial applications.
  • Complete Assembly: Includes mullion, top and bottom mounting brackets, and screw pack for complete installation.
  • Cylinder Compatibility: Requires 1-1/4" mortise cylinder with standard A cam for secure key operation.
  • Field Adjustable: Mullions may be cut on the job for doors under stock lengths for custom applications.
  • Traffic Flow Control: Regulates the flow of in-and-out traffic while providing emergency egress capability.
  • Enhanced Door Performance: Minimizes door warpage and sag while providing increased security and tighter closure.

Technical Specifications

  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Parts and Accessories Type: Installation Accessories
  • Product Attribute: Parts and Accessories
  • Product Category: Exit Devices and Trim
  • Product Group: Exit Devices and Trim
  • Product Subgroup: Parts and Accessories
  • Product Type: Exit Devices Parts
  • Series: 19/24/25 Series
  • Subcategory: Parts and Accessories

Installation & Operation

This mullion assembly is designed for use with compatible 25/24/19 Series rim exit devices. Refer to the parent device installation instructions and manufacturer documentation for proper integration. Ensure compatibility with existing hardware before installation.

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose Falcon Quality?

Falcon exit device accessories deliver professional-grade reliability with heavy-duty steel construction engineered for demanding commercial applications. The KR4023 mullion system provides the perfect balance of security, accessibility, and traffic control for double door installations. Designed for seamless integration with 25/24/19 Series rim devices where dependable performance and operational flexibility are essential.

Manufacturer Resources

Falcon Exit Devices Catalog

Product Specs

Product Group:
Exit Devices and Trim
Series:
19/24/25 Series
Product Subgroup:
Parts and Accessories
Subcategory:
Parts and Accessories
Product Type:
Exit Devices Parts
Commercial/Residential:
Commercial
Parts and Accessories Type:
Installation Accessories
Product Attribute:
Parts and Accessories
Product Category:
Exit Devices and Trim
Department:
Door Hardware

Falcon KR4023 7FT2IN US28 – Frequently Asked Questions

1) How do I secure a pair of doors with rim exit devices when I can't have a fixed mullion in the way?
A removable mullion is the answer, and the Falcon KR4023 is the key removable version for 25/24/19 Series rim devices. The steel mullion stands between the two leaves and gives each rim device something to latch into, so both doors get a rim device instead of vertical rods. When you need the full opening clear for moving equipment or furniture, unlock it with a key, lift the mullion out, and set it back afterward. Emergency egress is unaffected while it is in place, since each leaf still pushes free on its own device.
2) What cylinder do I need to order with the Falcon KR4023 mullion?
A 1-1/4 inch mortise cylinder with a standard A cam. That is not included, so it goes on the order separately, and the keying needs to be specified to match whatever the rest of the opening runs. Without the cylinder the mullion cannot be locked in position or removed by key.
3) What lengths does the Falcon KR4023 mullion come in, and what do I do about a door height in between?
Five stock lengths: 7 ft 2 in, 7 ft 3 in, 8 ft 2 in, 8 ft 3 in, and 10 ft 2 in. For an opening shorter than the stock length you buy, the mullion can be cut in the field, so the 10 ft 2 in size covers tall openings that fall between the listed sizes. Order the next length up from your frame height and trim it down.
4) Is there a fire rated version of the Falcon KR4023 removable mullion?
Yes, the KR4023 is ordered either fire rated or non fire rated, and both come in all five lengths (7 ft 2 in, 7 ft 3 in, 8 ft 2 in, 8 ft 3 in, and 10 ft 2 in). On a fire rated pair of doors the fire rated mullion is the one to specify, and the rim devices on the leaves have to be fire rated exit devices as well. Pick the wrong one and the opening fails inspection even though it fits.
5) Will the KR4023 mullion work with my Falcon exit devices, or only certain series?
It is built for Falcon 25, 24, and 19 Series rim exit devices. Rim is the key word: the device has to latch out the front edge into the mullion. Falcon surface vertical rod or mortise devices from those same series latch at the head and sill or into the frame edge, so they have nothing to engage a mullion with and the KR4023 does not apply to them.
6) Will an Arrow 16RCR-27 SFIC rim housing work as the cylinder for a Falcon KR4023 removable mullion?
No. The Falcon KR4023 key removable steel mullion for 25/24/19 Series rim exit devices takes a 1-1/4 inch mortise cylinder with a standard A cam to release the mullion for removal. The Arrow 16RCR-27 is a 6/7-pin SFIC rim housing, which is a rim-prep small format interchangeable core housing rather than a mortise cylinder, so it does not thread into the mullion keeper. Order the KR4023 with a 1-1/4 inch mortise cylinder keyed to the opening; keep the 16RCR-27 for a rim device that is prepped for an SFIC rim housing.
7) The doors have Von Duprin 33A devices on them - can a Falcon KR4023 mullion be used with those?
The Falcon KR4023 key removable steel mullion is built for 25/24/19 Series rim exit devices, and Falcon publishes the mullion against that series. Von Duprin 33A devices belong to the 33/35 Series family, which is the series the Von Duprin 040070/040071 cylinder dogging with indicator conversion kit is listed for on 36 inch and 48 inch 33A devices. Match the mullion to the device series already hung on the pair of doors: a 25/24/19 Series rim device pairs with the KR4023, while a 33A opening should be mulled with hardware listed for the 33/35 Series.
8) Should I use a removable mullion or vertical rod devices on my double doors?
Two different trade-offs. With a mullion, both leaves take rim devices, the mullion carries the latching point, and the doors close tighter with less warpage and sag over time because nothing is pulling at the top and bottom of the leaf. Vertical rods leave the opening completely clear all the time but put hardware on the face or inside the door, and rods at the threshold pick up abuse in traffic. Go mullion where the opening is only occasionally needed at full width and you want the simpler rim device on each leaf; go vertical rod where carts or freight move through constantly and nobody will bother pulling a mullion.
9) Can I add electric latch retraction to a pair of doors using the KR4023 mullion?
The mullion itself is mechanical, with no electrical option. Latch retraction is a change you make at the exit device, not at the mullion, so a mullion opening can still be electrified by choosing the right devices. On the Von Duprin side, the 040061 QEL modular conversion kit adds quiet electric latch retraction to 33A, 35A, 98, and 99 Series devices in 3 foot and 4 foot sizes, and the 04116 QELX kit does the same job on AX devices. Those are Von Duprin parts and will not go on Falcon 25, 24, or 19 Series hardware.
10) Do I need one mullion per pair of doors, or one per leaf?
One per pair. The mullion sits at the center of the opening between the two leaves, top bracket into the frame head and bottom bracket at the floor, and both rim devices latch into it. What you do need per leaf is a rim exit device, and one mortise cylinder for the mullion itself.
11) We want to keep a double door pair open wide for deliveries but the exit devices are electrified - is a KR4023 mullion or a latch retraction conversion kit the right buy?
They solve different problems. The Falcon KR4023 key removable steel mullion mounts between the two leaves and is unlocked by key and lifted out to give full width access through the opening, then reinstalled to hold the pair tight and control in-and-out traffic. A latch retraction kit such as the Von Duprin 040061 QEL modular conversion kit, listed for 33A/35A/98/99 Series 3-foot and 4-foot devices, changes how the device latch retracts electrically; it does not clear the center of the opening. If the requirement is a clear full-width path for equipment or deliveries, the removable mullion is the part that does it.
12) What finish does the Falcon KR4023 mullion come in?
US28 aluminum anodized, across every length and both the fire rated and non fire rated versions. That is a light silver-grey that reads close to aluminum storefront framing and to the US28 finish commonly used on Falcon rim devices, so it disappears between a pair of aluminum doors. If the rest of your openings are in a dark bronze or a brass finish, the mullion will not match them.
13) Is the Falcon KR4023 mullion rated for high traffic commercial openings?
It is a commercial part, steel through the mullion body, meant for openings that cycle hard: office buildings, schools, hospitals, retail, warehouses, and government facilities. A property manager standardizing a building can run the same KR4023 on every pair of doors that carries Falcon 25, 24, or 19 Series rim devices, matching length to each frame height.
14) Is a Von Duprin QELX conversion kit an alternative to a removable mullion on a double door?
No, those are separate scopes of work. The Von Duprin 04116 and 041166 QELX kits are conversion kits for AX exit devices, one modular and one a baseplate kit, and they alter the device itself rather than the opening between the leaves. The Falcon KR4023 is a steel mullion assembly that ships with the mullion, top and bottom mounting brackets and a screw pack, and mounts in the center of a pair of doors to add security and tighter closure while reducing warpage and sag. A pair that needs a center post needs the mullion; a device that needs electric latch retraction needs the conversion kit.
15) One of our exit devices needs a top latch replacement - does the Falcon KR4023 cover that repair?
It does not. The Falcon KR4023 is a key removable steel mullion assembly, the vertical post that stands between a pair of doors, and it is an installation accessory rather than an internal device repair part. A top latch repair on an exit device is handled by a latch component such as the Accentra 60-7010-0049-999 top latch replacement component for 7110/7120 devices or the 60-7010-0050-999 for the 7110F, both listed as non fire rated. Order the mullion for the opening and the matching latch component for the device that needs the repair.
How fast can I get the Falcon KR4023 7FT2IN US28 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 Falcon KR4023 7FT2IN US28 come with a warranty?
Absolutely. The Falcon KR4023 7FT2IN US28 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 Falcon KR4023 7FT2IN US28?
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
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