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Von Duprin KR4954-8-6 Keyed Removable Steel Mullion for Rim Exit Devices with Self-Locking Reinstallation
Single-Door Performance in Double-Door Openings
The Von Duprin KR4954-8-6 Keyed Removable Steel Mullion is engineered to deliver single-door performance in double-door openings equipped with rim exit devices. Measuring 2" (51 mm) wide and 3" (76 mm) deep with a 1/8" (3 mm) wall thickness, this Grade 1 Commercial mullion is available in an 8'6" height and is constructed for demanding commercial applications. A single operation of the mortise cylinder releases the mullion, allowing large equipment or furniture to pass through freely, while the mullion self-locks upon reinstallation — no cylinder key required. Requires a 1-1/4" mortise cylinder with a straight cam (Schlage cam reference B502-191), sold separately.
Professional Features & Benefits
- Precise Dimensions: 2" (51 mm) width and 3" (76 mm) depth with a 1/8" (3 mm) wall thickness provide a robust, space-efficient profile suited for commercial double-door openings.
- Available Heights: Offered in 7'6", 8'6", and 10'6" heights to accommodate a wide range of door frame configurations.
- Self-Locking Reinstallation: The mullion automatically self-locks when reinstalled, eliminating the need for a cylinder key during re-engagement and streamlining daily operations.
- Single-Cylinder Release: One operation of the mortise cylinder releases the mullion, enabling unobstructed passage of large equipment or furniture through the opening.
- Grade 1 Commercial Construction: Rated Grade 1 Commercial for heavy-duty performance in high-traffic commercial environments.
- Cylinder Compatibility: Requires a 1-1/4" mortise cylinder with a straight cam (Schlage cam reference B502-191); cylinders are sold separately for flexible specification.
- Strike Prep Options: Available with 299 Strike Prep or No Prep (Blank) to suit various installation requirements; ships with mounting screws and is prepped for strikes (strikes not included unless otherwise indicated).
- Finish Options: Available in SP28 (Aluminum Painted) and SP313 (Dark Bronze Painted) to complement a variety of architectural aesthetics.
Technical Specifications
- Product Group: Exit Devices and Trim
- Series: KR4954
- Grade: Grade 1
- 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
- Fire Rating: No
- Product Category: Exit Devices and Trim
- Department: Door Hardware
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 Von Duprin Quality?
Von Duprin keyed removable steel mullion products are built to Grade 1 Commercial standards, ensuring reliable performance in the most demanding high-traffic environments. The KR4954 series features self-locking reinstallation and single-cylinder release for streamlined daily operation, backed by Von Duprin's reputation for professional-grade door hardware. Engineered for commercial applications where dependable performance and ease of use are essential.
Manufacturer Resources
Von Duprin 98/99 Series Catalog
Product Specs
- Maximum Purchase:
- 5 units
- Product Group:
- Exit Devices and Trim
- Series:
- KR4954
- Grade:
- Grade 1
- 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
- Fire Rating:
- No
- Product Category:
- Exit Devices and Trim
- Department:
- Door Hardware
Von Duprin KR4954 7 FT 6 IN SP313 – Frequently Asked Questions
1) What is the Von Duprin KR4954 keyed removable mullion used for?
The KR4954 is a steel mullion that provides structural support between double doors while allowing authorized removal with a key. It's commonly used in commercial applications where occasional wide opening access is needed while maintaining security.
2) Which Von Duprin exit devices is this mullion compatible with?
This mullion works with Von Duprin exit devices designed for double door applications. Verify compatibility with your specific exit device model and door configuration before ordering.
3) How is the keyed removal feature operated?
The mullion can be unlocked and removed using the provided key mechanism. This allows the mullion to be taken out when full width access is needed, then reinstalled when standard operation is required.
4) What finish options are available for the KR4954?
Contact us to confirm available finishes for this steel mullion. Von Duprin typically offers finishes to match their exit device hardware lines.
5) What are the structural requirements for this mullion?
Steel construction provides robust structural support. Verify door weight capacity and frame requirements with manufacturer specifications. Proper installation requires adequate floor and header attachment points.
6) Does this mullion meet fire and building code requirements?
Von Duprin mullions are designed to work with code-compliant exit systems. Confirm specific fire rating and ADA compliance requirements with local code officials for your installation.
7) What hardware components are included with the KR4954?
The mullion includes the steel post, keyed removal mechanism, and necessary mounting hardware. Check specification sheet for complete component list and any required field-supplied items.
8) What are the basic installation requirements?
Installation requires secure mounting to floor and header. Follow Von Duprin installation templates for proper positioning. Coordinate with door frame preparation and exit device installation.
9) How do I maintain the keyed removal mechanism?
Keep the key mechanism clean and lubricated per Von Duprin maintenance guidelines. Test removal and reinstallation periodically to ensure smooth operation. Inspect mounting points for secure attachment.
10) Are there other Von Duprin mullion options available?
Von Duprin offers various mullion configurations including fixed, removable, and surface-mounted options. Browse our Von Duprin collection for alternative models that may suit your application.
11) What field conditions affect mullion installation?
Consider floor conditions, header structure, and door alignment. Uneven floors may require shimming. Ensure adequate clearance for mullion removal path when key operation is needed.
How fast can I get the Von Duprin KR4954 7 FT 6 IN SP313 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 KR4954 7 FT 6 IN SP313 come with a warranty?
Absolutely. The Von Duprin KR4954 7 FT 6 IN SP313 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 KR4954 7 FT 6 IN SP313?
You can call, text, or email our expert support team for fast answers. We’re here to help with
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selection,
installation tips, and troubleshooting. Contact Us
Why buy the Von Duprin KR4954 7 FT 6 IN SP313 from ZenSupply?
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and
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every order.
Our team is always ready to help you choose the right product for your project.