Sargent 28-11U15 LL Passage Function Cylindrical Latchset, Extra Heavy Duty

Function Information:

The Sargent 28-11U15 LL is an industrial-grade Extra Heavy Duty Passage Latchset engineered for high-traffic commercial openings that require effortless operation without compromising on structural integrity. As part of the prestigious Sargent 11-Line Series, this cylindrical latchset is designed for doors where locking is not required but extreme durability is mandatory. The 28-prefix denotes that while this specific function is non-keyed, it belongs to a hardware family prepared for high-security environments, featuring the iconic LL Lever design for a clean, professional aesthetic.

Engineering Beyond the Grade 1 Standard

While many competitors strive to meet the minimum ANSI/BHMA A156.2 Grade 1 requirements, the Sargent 11-Line completely redefines the category. Independent laboratory testing has confirmed that this hardware is in a class of its own:

• 12 Times the Industry Standard: Tested to exceed 10,000,000 (Ten Million) cycles. This is 12 times the 800,000-cycle requirement for Grade 1 certification, ensuring decades of maintenance-free service.
• Extreme Torque Resistance: The 11U15 is built to withstand over 3,000 in/lbs of torque on the lever. This is 3 times the force required for Grade 1 status, making it virtually immune to the physical abuse common in schools and hospitals.
  
• Zero Lever Sag: Utilizing high-carbon steel spring cartridges, the LL lever remains perfectly horizontal for the life of the product, eliminating the "droop" found in lesser latchsets.
• 10-Year Limited Warranty: Sargent provides a decade of protection with no service required to maintain the warranty, offering the lowest total cost of ownership in the industry.

Versatile Passage Function (ANSI F75)

The 15 Passage or Closet Function is the premier choice for interior doors that must remain accessible at all times while providing a solid, fire-rated latching mechanism.

• Always Active Operation: Both the interior and exterior levers always retract the latchbolt. There are no buttons, toggles, or cylinders to impede movement.
• Smooth High-Frequency Access: Ideal for corridors, break rooms, and communal areas where doors are opened hundreds of times per day.
• ADA Compliant Design: The LL Lever is designed for easy operation without requiring tight grasping, pinching, or twisting of the wrist, meeting all Americans with Disabilities Act requirements.
  
• Fire-Rated Safety: UL/cUL Listed for use on 3-hour fire-rated doors, ensuring the integrity of fire barriers in commercial hallways.
  

Technical Specifications & Compatibility

Why Choose the Sargent 28-11U15 LL?

In high-abuse environments like university dorms, busy hospitals, and government offices, hardware failure leads to costly maintenance cycles. The Sargent 11-Line 11U15 removes that burden. By installing a latchset proven to survive 10 million cycles, facility managers can "set it and forget it," knowing the hardware will perform flawlessly year after year.

Ideal Applications:

• Hospital Corridors: Durable enough for constant 24/7 traffic from staff and equipment.
• School Break Rooms: Vandal-resistant construction that stands up to student use.
• Public Building Interior Doors: Providing a fire-rated, ADA-compliant solution for non-secure areas.
  
• Commercial Offices: Enhancing the professional look of the facility with high-performance linear levers.