Norton 8501H Surface Door Closer — Full Cover | Hold-Open Tri-Pack

The Norton 8501H is an architectural-grade, cast-aluminum rack-and-pinion surface door closer from Norton's 8000 Series, featuring a full-cover design (8501, not the slim 8301 profile). This listing includes the hold-open Tri-Style arm tri-pack, giving installers a single package that accommodates regular, top-jamb, and parallel-arm mounting configurations. Available in 689, 690, and BSP. 689 ships in 1 Business Day; 690 and BSP are factory order, 3-4 weeks. It suits a wide range of commercial and institutional door applications.

Key Features & Benefits

• Rack-and-Pinion Precision: Cast-aluminum body with a 1-1/4 in (32 mm) piston and 5/8 in pinion journals for smooth, reliable closing cycle after cycle.
• Hold-Open Arm Tri-Pack: Includes hardware for three arm configurations — regular, top-jamb, and parallel — in one box, reducing job-site ordering complexity.
• Adjustable Spring Power: Spring sizes 1 through 6 per ANSI/BHMA A156.4 option PT 4H, allowing the installer to dial closing force to match door weight and traffic demands.
• Heavy Door Capability: Door-weight rating of 250 lb, covering most commercial hollow-metal and solid-wood door assemblies.
• Three Independent Hydraulic Valves: Separate latch-speed, sweep-speed, and backcheck valves provide precise, independent control of each closing phase; backcheck engages at approximately 75 degrees of swing.
• Wide Swing: Supports up to 180-degree door swing on standard-arm applications (conditions permitting), maximizing clear opening width.
• Cold-Weather Fluid: NorGlide hydraulic fluid rated to -40 °F maintains consistent performance in cold-storage, northern climate, and exterior vestibule applications.
• UL-Listed Full Cover: High-impact molded cover is UL listed and conceals the closer body for a cleaner architectural appearance while protecting internal components.
• ADA / A117.1 Opening-Force Consideration: Closer is adjustable to help meet interior-door opening-force guidelines under ANSI A117.1 for accessible design (verify local AHJ requirements).
• Low Projection: 2-1/8 in projection keeps the closer body close to the door face, reducing corridor intrusion.
• Long-Term Warranty: 30-year limited warranty on the closer mechanism; lifetime warranty on the aluminum housing. Must be installed on the interior side of the building to maintain warranty coverage.

Applications

Ideal for commercial office buildings, schools, hospitals, government facilities, and institutional corridors where a durable surface closer with hold-open capability and tri-pack mounting flexibility is required. The 689 aluminum finish integrates naturally with anodized aluminum door frames and commercial storefront systems.

Technical Details

Need an alternative from a preferred line? DoorwaysPlus can quote comparable surface closers from Hager, Norton, Corbin Russwin, and PDQ — contact our commercial hardware team for a fast comparison.

Closer Adjustments

Use the hex wrench supplied with the closer. Never force valves out of the closer. Never completely close the backcheck valve. The door must be open to adjust spring power. Do not use a power drill -- that voids the warranty. Do not remove the valves; removal causes a fluid leak.