Von Duprin KR4854-S Keyed Remo...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2,087.00
$1,379.04
Von Duprin KR4854-S Keyed Removable Steel Mullion Prepped for 299 Strike and 6111 Electric Strike

Von Duprin KR4854-S Keyed Removable Steel Mullion Prepped for 299 Strike and 6111 Electric Strike

(No reviews yet) Write a Review

Model: VON-KR4854 7 FT 6 IN SP28
$2,087.00
$1,379.04
Selected Finish is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$2,087.00
$1,379.04
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Von Duprin KR4854-S Keyed Removable Steel Mullion Prepped for 299 Strike and 6111 Electric Strike

Single-Operation Keyed Removal for Double Door Openings with Rim Devices

The Von Duprin KR4854-S Keyed Removable Steel Mullion delivers single door performance in double door openings equipped with rim exit devices. Engineered for fast, convenient removal through a single operation of the mortise cylinder, this Grade 1 commercial mullion allows large equipment or furniture to pass freely through the opening once removed. Constructed of steel measuring 2" (51mm) wide and 3" (76mm) deep with a wall thickness of 1/8" (3mm), the KR4854-S is prepped for one 299 Strike and one 6111 Electric Strike, and is available in SP28 and SP313 finishes.

Professional Features & Benefits

  • Steel Construction Dimensions: Mullion body measures 2" (51mm) wide and 3" (76mm) deep with a wall thickness of 1/8" (3mm) for robust, commercial-grade structural integrity.
  • Keyed Removable Operation: Single-operation removal via a 1-1/4" mortise cylinder with a straight cam (Schlage cam reference B502-191) makes removal faster and easier than standard mullions.
  • Self-Locking Re-Installation: The unit self-locks when re-installed without use of the cylinder key, ensuring secure, tool-free reinstallation after passage of large equipment or furniture.
  • Strike Compatibility: Factory prepped for one 299 Strike and one 6111 Electric Strike, providing versatile configuration options for both standard and electrified openings.
  • Easy Removal Mechanism: Mullion is removed by loosening the bottom set screw and removing the top fitting cover; the top mullion fitting attaches to the frame and is concealed by the fitting cover for a clean appearance.
  • Grade 1 Commercial Rating: Rated Grade 1 for demanding commercial applications requiring reliable, long-term performance in high-traffic double door openings.
  • Finish Options: Available in SP28 and SP313 finishes to coordinate with surrounding door hardware and architectural requirements.
  • Cylinder Sold Separately: Requires a 1-1/4" mortise cylinder with a straight cam (Schlage cam reference B502-191); cylinders are not included and must be ordered separately.

Technical Specifications

  • Product Group: Exit Devices and Trim
  • Series: KR4854
  • Grade: Grade 1
  • Product Subgroup: Parts and Accessories
  • Subcategory: Parts and Accessories
  • Product Type: Exit Devices Parts
  • Commercial/Residential: Commercial
  • Parts and Accessories Type: Replacement Parts
  • Product Attribute: Parts and Accessories
  • Fire Rating: No
  • Product Category: Exit Devices and Trim
  • Department: Door Hardware

Professional Applications

  • Commercial Office Buildings with Double Door Openings
  • Educational Facilities Requiring Accessible Egress
  • Healthcare Institutions with High-Traffic Corridors
  • Retail Establishments with Wide Entry Points
  • Industrial and Warehouse Facilities Requiring Equipment Access
  • Government and Municipal Buildings
  • Multi-Tenant Residential and Mixed-Use Properties

Why Choose Von Duprin Quality?

Von Duprin keyed removable steel mullion products are built to Grade 1 commercial standards, featuring robust steel construction at 2" (51mm) wide and 3" (76mm) deep with a 1/8" (3mm) wall thickness for lasting durability in demanding environments. The KR4854-S series simplifies mullion removal to a single cylinder operation while providing automatic self-locking reinstallation, reducing downtime and maintenance effort. Engineered for professional commercial applications where dependable performance and operational efficiency are essential.

Manufacturer Resources

Von Duprin 98/99 Series Catalog

Product Specs

Product Group:
Exit Devices and Trim
Series:
KR4854
Grade:
Grade 1
Product Subgroup:
Parts and Accessories
Subcategory:
Parts and Accessories
Product Type:
Exit Devices Parts
Commercial/Residential:
Commercial
Parts and Accessories Type:
Replacement Parts
Product Attribute:
Parts and Accessories
Fire Rating:
No
Product Category:
Exit Devices and Trim
Department:
Door Hardware

Von Duprin VON-KR4854 7 FT 6 IN SP28 – Frequently Asked Questions

1) Will a Von Duprin KR4854-S mullion work with my rim exit devices on a pair of doors?
That's exactly what it's for. The KR4854-S is a removable steel mullion for double door openings fitted with rim exit devices, giving you single door performance on a pair. The rim device latches into the mullion rather than into the opposite door, so each leaf operates independently. It won't do anything for vertical rod devices, which latch at the head and threshold and don't need a mullion at all.
2) Does the KR4854-S mullion come with the cylinder, or do I need to order one?
You order the cylinder separately. The KR4854-S needs a 1-1/4 inch mortise cylinder with a straight cam, Schlage cam reference B502-191. Get that on the order with the mullion or the keyed removal feature is dead on arrival. Keyway and keying are your call, so it can be brought into the building's existing system.
3) How much clear opening do I lose with a Von Duprin KR4854 mullion in the doorway?
Two inches of width while it's in place. The mullion body is 2 inches (51mm) wide and 3 inches (76mm) deep, steel with a 1/8 inch (3mm) wall. When you need the full opening for equipment or furniture, the whole mullion comes out with one turn of the cylinder, so the loss is temporary rather than permanent.
4) Is the KR4854-S fire rated? I need a mullion for a fire rated pair.
No. The KR4854-S carries no fire rating, so it should not go on a fire rated opening. Fire rated pairs need a fire labeled mullion matched to the device and the door label; substituting a non-rated mullion voids the opening's listing.
5) What do I have to specify when ordering a Von Duprin KR4854-S mullion?
Four things. Handing, either RHR (right hand reverse) or LHR (left hand reverse), and it is required on every order. Finish: SP28 aluminum painted, SP313 dark bronze painted, or SPBLK flat black. Strike prep: 299 strike prep or no prep (blank). And length, which is 7 feet 6 inches on every combination offered.
6) Can I put an electric strike on a KR4854-S mullion for access control?
Yes. The KR4854-S is factory prepped for one 299 strike and one 6111 electric strike, so an access controlled pair with a rim device is a straight build rather than a field modification. You'd still run the wiring up the mullion and coordinate power and the door position switch with your controller.
7) Does handing matter on a removable mullion, and how do I tell RHR from LHR?
Handing is required on the KR4854-S and there are two choices, RHR and LHR. It sets the side the strike prep and the cylinder operation face. Stand outside the opening on the side you push to exit: hinges on the right is right hand reverse, hinges on the left is left hand reverse. Getting it backwards puts the strike prep on the wrong face of the mullion.
8) What is the difference between the Von Duprin KR4854-S mullion and the Falcon 4023 mullion?
Both are steel mullions that let a pair of doors carry rim exit devices as if each leaf were a single door. The Von Duprin KR4854-S is the keyed removable version: a single turn of a 1-1/4 inch mortise cylinder with a straight cam releases it so equipment or furniture can pass through the full opening, and it self-locks when re-installed without using the key. Its body is 2 inches (51mm) wide by 3 inches (76mm) deep with a 1/8 inch (3mm) wall, it is rated Grade 1, and it is prepped for one 299 strike and one 6111 electric strike. The Falcon 4023 is a steel mullion for double door exit device applications without that keyed removal feature. If the opening never needs to be cleared for oversized loads, a fixed mullion covers it; if a facility moves beds, pallets, or staging equipment through the pair, the keyed removable KR4854-S is the one to specify.
9) The KR4854-S needs a mortise cylinder. Will an Arrow 16RCR-27 SFIC rim housing work for it?
No. The Arrow 16RCR-27 is a 6/7-pin SFIC rim housing from the 24/25 Series, a rim cylinder housing built for rim exit device trim. The Von Duprin KR4854-S keyed removable mullion is operated by a 1-1/4 inch mortise cylinder with a straight cam, Schlage cam reference B502-191, and that cylinder is ordered separately. A rim housing and a mortise cylinder are different cylinder formats with different cams, so a locksmith keying an opening should order the mortise cylinder for the mullion and keep the rim housing for the device trim it belongs to.
10) Our double doors have concealed vertical rod exit devices, not rim devices. Is the KR4854-S the right part?
No. The Von Duprin KR4854-S is built to deliver single door performance in double door openings equipped with rim exit devices, which latch into strikes on the mullion, and it is prepped for one 299 strike and one 6111 electric strike. Concealed vertical rod devices latch into the head and threshold instead, so the opening has no mullion and there is nothing for the KR4854-S to do. On a vertical rod pair, the parts that keep the opening working are the rod and latch components for the device itself, such as the Falcon 610061 24 Series Monarch concealed vertical top rod for F-25-C and F-25-CWDC exit devices. Confirm which device family is on the doors before ordering.
11) Should I get the KR4854 mullion with the 299 strike prep or blank?
Take the 299 prep if you're mounting a rim device strike to the mullion, which is the normal setup on a pair with rim exits. Order the blank version when you're prepping in the field, using a different strike, or replacing a mullion whose hole pattern you want to set yourself. Both are offered in all three finishes at 7 feet 6 inches.
12) How does the keyed removable mullion differ from a standard removable mullion?
Speed of removal, mainly. On the KR4854-S you turn the mortise cylinder once and the mullion releases; a standard removable mullion typically means unfastening at the top and bottom. Putting it back is tool free, since the unit self locks on re-installation without using the key. It's the right choice where the opening gets cleared regularly, for deliveries, gurneys, or furniture moves.
13) Is a Von Duprin KR4854 mullion durable enough for a high traffic entrance?
It's Grade 1, the commercial duty level, and it's steel through the section, 2 inches by 3 inches with a 1/8 inch wall. That's the specification you want on a main entrance, a corridor pair, or a loading area where the mullion takes cart and equipment contact.
14) How is the KR4854 mullion actually mounted and taken out at the opening?
The top fitting attaches to the frame and stays there; a fitting cover hides it, so nothing untidy shows above the door. To take the mullion out you loosen the bottom set screw and pull the top fitting cover, then it lifts free. Reinstallation locks itself, no key needed. The mullion is 7 feet 6 inches long, so confirm your frame height suits it before ordering.
15) Can Falcon 525 mullion stabilizers be used instead of a removable mullion?
No, they solve different problems. The Falcon 525 is a set of aluminum mullion stabilizers for exit devices, hardware that steadies a mullion in the opening. The Von Duprin KR4854-S is the mullion itself, a Grade 1 steel post 2 inches (51mm) wide by 3 inches (76mm) deep with a 1/8 inch (3mm) wall that stands between the two leaves and carries the strikes for rim exit devices, prepped for one 299 strike and one 6111 electric strike. A stabilizer accessory does not give a pair of doors a strike point, so it is not an alternative when the opening needs a mullion.
16) Is a mullion like the KR4854-S a substitute for replacing a worn exit device latch?
No. The Von Duprin KR4854-S is a Grade 1 steel mullion, the post between the two leaves of a pair, and it is a replacement part at the opening level rather than inside the device. When the latching mechanism on the device itself is the problem, the fix is a device component, such as the Accentra top latch replacement components for the 7110/7120 and for the 7110F exit devices, or the Falcon T Series 2-3/8 inch square corner deadlatch replacement part. Diagnose whether the failure is the device latch or the mullion the device latches into, because the two take entirely different parts.
How fast can I get the Von Duprin VON-KR4854 7 FT 6 IN SP28 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 Von Duprin VON-KR4854 7 FT 6 IN SP28 come with a warranty?
Absolutely. The Von Duprin VON-KR4854 7 FT 6 IN SP28 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 Von Duprin VON-KR4854 7 FT 6 IN SP28?
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 Von Duprin VON-KR4854 7 FT 6 IN SP28 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.
!