Lcn 4050A-3071DEL 689 Delayed Action Cylinder

Product Description

The LCN 4050A-3071DEL 689 is a delayed action cylinder designed as a replacement component for the LCN 4050 Series door closer line. This cylinder provides a controlled hold-open function during the sweep phase of door travel before engaging the closing mechanism, allowing personnel and equipment to pass through without the door closing prematurely. Finished in aluminum paint (689), it suits installations where aesthetics and corrosion resistance are both considerations. Licensed commercial door hardware technicians and facilities maintenance professionals are the typical installers for this type of component.

This delayed action cylinder fits within the 4050 Series closer assembly and is suited for commercial door applications where a timed hold-open during the initial swing arc is required. Typical installations include high-traffic entry doors in commercial, institutional, and healthcare facilities where hands-free or assisted passage is needed. It serves as a direct service replacement for worn or damaged cylinders within existing 4050 Series closer bodies already mounted on the door or frame.

Key Features

• Delayed action function holds the door open during the sweep zone before initiating controlled closing
• Aluminum painted finish (689) coordinates with standard commercial hardware finishes
• Designed as a service replacement cylinder for the 4050 Series closer body
• Supports serviceability of existing closer hardware without full unit replacement

Compatibility

Designed as an OEM-style replacement cylinder for LCN 4050 Series door closer assemblies.

Installation Notes

Installation and adjustment of door closer cylinders should be performed by a qualified door hardware technician or licensed commercial contractor. Before beginning service, ensure the door is secured in an open position and all tension is relieved from the closer arm assembly before removing the cylinder. Refer to the closer manufacturer's service documentation for proper cylinder removal and reinstallation procedures. Verify that the replacement cylinder matches the existing closer body configuration before final installation.