Von Duprin 15428 Mullion Stabilizer Set Aluminum

Product Description

The VON DUPRIN 15428 is a mullion stabilizer set designed to reinforce and steady the mullion in paired-door exit device installations. It provides structural support that reduces flex and movement at the door centerline, helping maintain consistent door alignment and reliable latching performance. Finished in 689 aluminum, the set suits aluminum-frame storefront and commercial hollow metal door assemblies. Licensed locksmiths, door hardware specialists, and commercial glazing contractors typically specify and install this component as part of a complete exit device assembly.

The 15428 is used in commercial and institutional buildings where paired doors require a stable mullion anchor point. Typical applications include office buildings, schools, hospitals, and other public facilities where Von Duprin exit devices are installed on double-door openings. The aluminum finish integrates cleanly with anodized aluminum door frames and storefront systems. The set is sold as a single assembly unit.

Key Features

• 689 aluminum finish integrates with anodized aluminum door frames and storefront hardware
• Reinforces mullion against lateral flex in paired-door exit device applications
• Compact profile: 4.5 inches long, 2 inches wide, 2 inches high
• Lightweight construction at 0.6 pounds for easy handling during installation
• Sold as a complete set in single-unit quantity

Compatibility

Designed as an OEM-style replacement and accessory stabilizer set for Von Duprin mullion assemblies used with commercial paired-door exit device installations.

Installation Notes

Installation should be performed by a licensed door hardware technician or qualified locksmith familiar with commercial exit device hardware. Before servicing, ensure the door is held open and any electric strike or access control power to the opening is de-energized. Follow the door manufacturer's hardware preparation template and the applicable provisions of NFPA 80 for fire-rated openings. Do not modify the stabilizer set or substitute fasteners, as doing so may affect door hardware certification compliance.