D-3550 Series Closer

Introduction 

Features 

Controls the door through the entire opening and closing cycles by providing adjustable backcheck upon opening and adjusting general and latch speeds through the closing cycle. 

Adjustable Spring Power – The D-3550 Series Door Closers are adjustable from size 2 through 6 with 15% adjustment over size 6. The D-3551 Series Door Closers are adjustable from size 1 through 4. The D-3551 Series Door Closers are designed to meet entrance accessibility requirements of 5 LBF opening force or less. 

Non-Critical Regulation – The separate adjustments for backcheck, general and latch speeds are equipped with non-critical “V-Slot” regulating valves which allow for fine tuning the closing and latching speeds as well as the backcheck intensity. 

All Season Fluid – All season fluid eliminates the need for seasonal adjustment. Special High Silicon Aluminum Alloy Housing All D-3550 / D-3551 Series Door Closers are constructed of Stanley R14 HIGH SILICON ALUMINUM ALLOY to exceed the ANSI/BHMAA156.4 Grade 1 requirements. 

Forged Arms – Heavy duty forged arms are interchangeable between the D-3550 and D-4550 Series Door Closers. 

High Impact Cover – All D-3550 / D-3551 Series Door Closers are shipped with a high impact self-extinguishing decorative cover. 

Special Rust Inhibitor (SRI) – Optional – For installations where a higher level of corrosive resistance is required. 

Maintenance Free – Door Closers mounted in accordance with the provided installation instructions are maintenance free from periodic inspection and adjustment. 

Delayed Action – Optional – The D-3550DA/ D-3551DA Series Door Closers are equipped with a separate hydraulic valve adjustment to delay the closing speed from 180 to 70 degrees of door opening range. 

Non-Handed – Can be used on both RH and LH doors for both push side and pull side mounting.