Norton CLP8501 Surface Door Closer — CloserPlus Arm | Full Cover | Finish 689

The Norton CLP8501 is an architectural-grade surface-mounted door closer from Norton's 8000 Series, featuring a full cover (8501 profile) and factory-installed CloserPlus parallel arm. Designed for commercial and institutional applications, this closer combines a precision cast-aluminum rack-and-pinion mechanism with a robust molded cover for a clean, finished appearance on the interior face of the door. This listing is finished in 689 (Aluminum).

Key Features & Benefits

• Cast Aluminum Rack-and-Pinion Body: Durable aluminum housing carries a lifetime-of-the-building warranty on the housing itself, backed by a 30-year limited warranty on the closer as a whole.
• CloserPlus Parallel Arm: The integrated parallel arm provides a non-hold-open configuration suited for openings swinging 85–110 degrees, keeping the arm tucked close to the frame for a lower-profile appearance compared to a standard regular-arm installation.
• Full Cover (8501 Profile): High-impact, UL-listed molded cover encloses the closer body for a finished architectural look and added protection against dust and tampering. Note: this is the full-cover 8501 model, not the slimmer 8301 profile.
• Wide Spring-Size Range: Adjustable spring sizes 1 through 6 per ANSI/BHMA A156.4 option PT 4H accommodate a broad range of door weights up to 250 lb, with a 1-1/4 in (32 mm) piston and 5/8 in pinion journals for consistent, reliable closing force.
• Independent Hydraulic Valves: Separate latch speed, sweep speed, and backcheck valves provide precise field adjustment. Backcheck engages at approximately 75 degrees to protect the door, frame, and wall from impact damage.
• NorGlide Hydraulic Fluid: Formulated to perform in temperatures as low as –40 °F, making this closer reliable in cold-climate vestibules, exterior corridors, and unconditioned spaces — as long as the unit is installed on the interior side of the building (required to maintain warranty).
• ADA / ICC A117.1 Opening-Force Compliance: Adjustable spring tension supports compliance with ADA and A117.1 interior door opening-force requirements when properly set. Consult the 2026 Norton catalog for application-specific guidance.
• 180-Degree Swing Capability: Standard arm configurations can accommodate up to 180-degree door swing, conditions permitting.

Applications

The CLP8501 is well suited for office buildings, schools, healthcare facilities, government buildings, and retail environments where a surface closer with a finished, covered appearance is specified. Its CloserPlus parallel arm is ideal where clearance above the door is limited or a cleaner soffit-side profile is preferred.

Technical Details

DoorwaysPlus also carries comparable surface closers from preferred lines including Hager, Norton, Corbin Russwin, and PDQ. Contact us for alternative specifications or to request a comparable quote.

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.