Sargent 8291 Heavy Duty Single Cylinder Mortise Lock with All Purpose Holdback Function

Sargent 8291 Heavy Duty Single Cylinder Mortise Lock with All Purpose Holdback Function and Grade 1 Rating

Industry Benchmark Mortise Lock with Maximum Security and Performance

The Sargent 8291 heavy duty single cylinder mortise lock represents the industry benchmark for commercial mortise locks, delivering maximum security, performance, and durability with high-quality components. This Grade 1 operational rated lock features 2 3/4" backset depth and 1 3/4" door thickness compatibility with field reversible handing. The multi-functional lock body integrates with all SARGENT key systems including Degree, Signature, KESO, and XC, and is UL 10C fire-rated up to 3 hours with comprehensive ANSI/BHMA A156.13 Series 1000 certification.

Professional Features & Benefits

• Exceptional Durability Testing: UL Cycle Above and Beyond test completed at 16 million cycles (Verification ID: V584148) for unmatched reliability in high-traffic commercial applications.
• Grade 1 Operational Rating: Robust lever-style design with patented construction provides maximum strength and security performance for demanding commercial environments.
• Precise Door Compatibility: 2 3/4" backset depth and 1 3/4" door thickness specifications ensure proper fit and function in standard commercial door preparations.
• EcoFlex Energy Technology: Electromechanical version operates from 12 to 24VDC with EcoFlex technology reducing power consumption up to 96% for significant energy savings.
• Universal Key System Integration: Compatible with all SARGENT key systems (Degree, Signature, KESO, and XC) for flexible master keying and security management.
• Multi-Functional Design: Available in 56 different functions including electromechanical, security and monitoring options with on-site function switching capability.
• Fire Safety Compliance: UL 10C fire-rated up to 3 hours with positive pressure certification and NFPA 80 compliance for critical fire door applications.
• Extended Warranty Protection: 10-year limited warranty with 2-year coverage on electrical components for long-term reliability assurance.

Technical Specifications

• Refer to manufacturer documentation for complete technical specifications.

Installation & Operation

1. Verify electrical requirements match available power supply. Confirm voltage (12 to 24VDC for electromechanical version) and current capacity before proceeding.
2. Disconnect power supply before beginning installation. Follow all applicable electrical codes and safety procedures.
3. Mount the unit in the specified location ensuring adequate clearance for wiring access, ventilation, and future service requirements.
4. Route and connect wiring according to manufacturer wiring diagrams. Use appropriate wire gauge and connectors for the application.
5. Configure operational settings including any configurable options per application requirements.
6. Restore power and test all functions including normal operation, alarm/alert functions, and integration with connected systems.
7. Complete final inspection and document settings. Refer to manufacturer documentation for complete wiring diagrams, programming instructions, and troubleshooting.

Professional Applications

• Commercial Office Buildings
• Educational Facilities
• Healthcare Institutions
• Retail Establishments
• Industrial and Warehouse Facilities
• Multi-Tenant Residential Properties
• Government and Municipal Buildings

Why Choose Sargent Quality?

Sargent mortise locks deliver professional-grade reliability with patented design and construction rated for 16 million cycles in independent UL testing. The 10-year limited warranty with 2-year electrical component coverage provides exceptional protection for demanding commercial applications. Engineered as the industry benchmark for mortise locks, this system combines maximum security with energy-efficient EcoFlex technology for dependable performance where reliability is essential.