The Ryobi D-4550DA Tri-Pack Delayed Action Door Closer is a premium-grade, heavy-duty commercial door closer designed for facilities that demand maximum durability, smooth operation, and controlled accessibility. Featuring integrated delayed-action technology, this closer allows the door to remain open momentarily before initiating the closing cycle—making it an excellent choice for ADA-compliant environments, healthcare settings, and buildings serving the elderly or disabled.
Engineered from R14 high-silicon aluminum alloy, the D-4550DA offers superior resistance to wear, corrosion, and fluid contamination, ensuring a long maintenance-free service life. The Tri-Pack configuration provides everything needed for Regular Arm, Top-Jamb, and Parallel Arm installations, giving installers flexibility in the field.
Key Features & Benefits
Integrated Delayed Action Valve: Keeps the door open for a pre-set period before closing—ideal for wheelchairs, carts, and high-accessibility zones.
Power Adjustable Size 1–6 (+50%): Suitable for a wide range of door weights and sizes, up to 60" wide and 440 lbs.
Full Hydraulic Control: Independent, fine-tuned adjustments for:
Closing speed
Latching speed
Backcheck resistance
Delayed-action timing
Non-Handed Design: Simplifies stocking and installation for both right- and left-hand doors.
Heavy-Duty Forged Steel Arms: Durable, interchangeable, and compatible with optional arms like EDA, Hold-Open, Stop, and Track-Rail.
All-Weather Hydraulic Fluid: Functions smoothly across wide temperature ranges—no seasonal adjustments required.
Certifications & Compliance
ANSI/BHMA A156.4 Grade 1 Certified – Rated for over 2 million cycles of high-traffic commercial use.
UL/cUL Listed to UL 228 & UL 10C – Fire-rated for use on self-closing fire doors.
Ideal Applications
ADA-compliant commercial doors
Hospitals and assisted living facilities
Schools, universities, and dormitories
Airports, transit stations, and hotels
Government and public buildings
Office buildings and retail entrances
Specifications
Mounting Options: Tri-Pack (Regular, Top-Jamb, Parallel Arm included)
Max Door Width: 60" (interior), 48" (exterior)
Max Door Weight: 330–440 lbs
Finish: Painted Plastic-Black
Warranty: 25-Year Limited Manufacturer’s Warranty
Ryobi D4550 Tri-Pack Delayed Action Heavy Duty Door Closer Specifications
SKU #:DTX-D4550DA-TP-BLK
Vendor :Detex
Weight :
19.84 lb
Feature(s) : Closing Body + Regular Arm (main arm, forearm, and foot(shoe)) + Parallel Bracket
Materials : R14 Hard High-Silicon Aluminum Alloy
Grade : 1 (Heavy Duty)
Standards : ANSI/BHMA A156.4-2019 Standard for Door Conrtrols,
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