Pemko 434APKL36 Automatic Door Bottom 36 Inches

Product Description

The PEMKO 434APKL36 is a full mortise automatic door bottom designed to seal the gap between the door face and the threshold when the door is in the closed position. As the door closes, the mechanism automatically drops a seal against the floor, then retracts when the door opens. The unit ships at 37 inches in length to allow field trimming to fit a 36-inch door. The body is mill finish aluminum, and the seal insert is PemkoPrene, a resilient gasket material suited for weather and air infiltration control. Licensed contractors and commercial door hardware installers are the primary installers of this product.

The 434APKL36 is intended for commercial and residential door applications where a mortised automatic door bottom is specified. It is recessed into the bottom rail of the door face, making it appropriate for new construction and retrofit projects where a flush, concealed appearance is required. Typical applications include exterior entry doors, corridor doors, and other openings where weather sealing, sound attenuation, or smoke control at the door bottom is needed.

Key Features

• Full mortise design mounts flush into the door bottom rail for a concealed profile
• Automatic drop-seal mechanism activates on door closure and retracts on opening
• PemkoPrene seal insert provides durable resistance to weather and air infiltration
• Mill finish aluminum body resists corrosion in commercial door environments
• Ships at 37 inches length to allow field trimming to a 36-inch door width

Compatibility

Designed as an OEM-style replacement or new-installation automatic door bottom for full mortise applications on standard 36-inch commercial and residential doors.

Installation Notes

Installation is performed by a qualified door hardware technician or finish carpenter. The door must be removed from the frame and the bottom rail routed to accept the mortise housing before the unit is set. Follow the door manufacturer's routing specifications for mortise depth and width. Verify door clearance from the finished floor before final installation to ensure proper seal contact without binding.