New International Door Closer 311-A S-DP Concealed Overhead NEW IN BOX

Description

New in box - Adjustable Power Concealed Overhead Door Closer 311A S-DP.
105 degree Backstop - no hold open.
International Series 300 Concealed Overhead Door Closer - Model 311- No Hold Open with "A" Type End Loading Top Arm Assembly (1" Depth Top Rail) with mounting brackets. 105 Degree Built-in positive Backstop with No Hold-Open Function - ADA (Handicap) with 8.5lb. opening force. For use on Exterior Doors with center pivoted applications. Center Hung Doors: Double or Single Acting (Door Stop applied to frame renders unit Single Acting) - Adjustable for a range of sizes from 8.5lbs opening force to medium spring tension, fully adjustable after installation. Two speed control Valves: Closing and Latching speeds controlled by separate regulating valves, fully adjustable after installation. Fits an aluminum header or transom bar as small as 1 ¾" x 4" - Positive centering for alignment and to hold door closed against any normal wind or draft. Stable hydraulic door check fluid for any climatic operation and constant lubrication