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Sargent 351 OTB Powerglide® Door Closer | Pull Side Track Arm with Bumper
The Sargent 351 OTB Door Closer is an architectural-grade solution designed for high-traffic environments where a clean, low-profile aesthetic is required without sacrificing heavy-duty protection. As part of the elite Powerglide® 351 Series, this model features a Pull Side Track Arm equipped with an integrated Track Bumper. The track system eliminates the protruding arms of standard closers, while the bumper provides an auxiliary cushion to assist the hydraulic backcheck, protecting the door and frame from damage during forceful opening cycles.
Engineered with a one-piece die-cast aluminum silicon alloy body (containing 14% silicon), the 351 OTB offers industry-leading strength and wear resistance. This ANSI/BHMA Grade 1 closer is fully non-handed and features adjustable spring power from Size 1 to 6, making it the perfect choice for institutional settings like schools and hospitals that must meet strict ADA accessibility requirements and fire safety codes.
Advanced Performance & Safety Features
- Low-Profile Track with Bumper: The OTB track provides a sleek appearance on the pull side of the door. The integrated bumper assists the backcheck feature by cushioning the door near its maximum opening angle.
- Superior Hydraulic Control: A massive 1-1/2" diameter piston ensures smooth, consistent operation. Independent brass valves allow for precise regulation of closing speed, latching speed, and backcheck intensity.
- All-Weather Reliability: Pre-filled with all-weather hydraulic fluid, the closer maintains stable performance in extreme temperatures (heat or cold) without the need for seasonal adjustments.
- Tamper-Resistant Engineering: Adjustment valves are controlled by an 1/8" Allen wrench and are captivated to prevent unauthorized removal or vandalism.
- Fire & Safety Certified: UL/cUL listed for use on fire doors (up to 3 hours) and compliant with UL10C and UBC positive pressure standards.
- MicroShield® Finish: Available with an optional antimicrobial silver-based coating to suppress the growth of bacteria, mold, and fungus.
Technical Specifications
| Feature | Details |
| Manufacturer | Sargent (ASSA ABLOY) |
| Model Number | 351 OTB (Track with Bumper) |
| Certification | ANSI/BHMA A156.4 Grade 1 |
| Arm Type | Forged Steel Arm with Extruded Aluminum Track |
| Spring Power | Adjustable Size 1 through 6 (Factory set to 3) |
| Bumper Feature | Integrated Track Bumper (Assists Backcheck) |
| Body Material | 14% Silicon Aluminum Alloy |
| Handing | Non-Handed (Field Reversible) |
| Warranty | 25-Year Limited Mechanical Warranty |
Installation & Finish Options
The Sargent 351 OTB is designed for pull-side mounting on the door leaf with the track on the frame face. The package includes self-sticking templates and all necessary fasteners. For installations on wood or mineral core doors, it is recommended to use the included Sargent thru bolts to ensure a rigid, long-lasting attachment.
Available at DoorwaysPlus.com in three high-durability architectural enamel finishes: Aluminum Enamel (EN), Dark Bronze Enamel (EB), and Brass Enamel (EAB).
| General - US Finishes | EN - Aluminum Enamel or EAB - Spray Gold or EB - Bronze Enamel |
| Brand | Sargent |
| Series | Sargent - 351 Series |
| Closer Arm Type | Track Arm |
| Hold Open | Non-Hold Open |
| Closer Body Hole Pattern | 9" x 2 1/2" |
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