Corbin Russwin ML20915 Grade 1 No Cylinder Override, Both Grips Lock, Mortise Electrified Lever Lockset, DS-Dirke Lever

Corbin Russwin ML20915-DS Mortise Electrified Lever Lockset, No Cylinder Override, Both Grips Lock, Dirke Lever

ANSI/BHMA Grade 1 Electrified Mortise Security for High-Traffic Commercial Applications

The Corbin Russwin ML20915-DS is a heavy-duty mortise electrified lever lockset from the ML2000 Series, engineered to meet the rigors of high-traffic, abusive environments. Featuring the Dirke lever design with No Cylinder Override and Both Grips Lock functionality, this lockset delivers Fail Safe and Fail Secure operation for demanding access control applications. Constructed of heavy-gauge steel and certified to ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1, it accommodates door thicknesses from 1-3/8" to 4" with a standard backset of 2-3/4" and a 3/4" latchbolt throw. UL listed, UL10c compliant, and ULC listed for use on fire doors rated up to and including 3 hours, this lockset integrates seamlessly with access control platforms and Corbin Russwin key systems including the patented Access 3® and Pyramid systems.

Professional Features & Benefits

• ANSI/BHMA Grade 1 mortise lock per A156.13 Series 1000, Operational and Security Grade 1
• UL Cycle above and beyond: 14.5 Million Cycles (Verification ID: V875753)
• Patented Quick Reversible latchbolt — reverse handing without disassembling the lock case
• Multi-function capability: 12 functions configurable from one ML2054 lockbody
• Heavy-gauge steel lockcase 5-7/8" x 4" x 15/16"; 1" stainless steel deadbolt, 1" throw
• 3/4" (19mm) throw anti-friction two-piece latchbolt requires less force to close
• Wide variety of trim designs including Muséo®, Vineyard™, Behavioral Health (BHSS/BLSS)
• Status indicator options for locked/unlocked visibility (sectional and escutcheon trim)
• Motorized Electric Latch Retraction (MELR) available for ML20900 series
• Thru-bolted trim designs for proper alignment and increased security
• Can be used with new or existing Corbin Russwin key systems; accepts most other manufacturers' cylinders
• UL/cUL listed, UL10C positive pressure; 3-hour fire door up to 4' x 10' single or 8' x 10' pair
• Ten-year mechanical warranty; five-year MELR; two-year electrical

Technical Specifications

• Grade: ANSI/BHMA A156.13 Series 1000, Operational and Security Grade 1
• Handing: Handed; quick reversible — re-handed without disassembling the lock case
• Door Thickness: 1-3/4" (44mm) standard; optional thicknesses available
• Backset: 2-3/4" (70mm)
• Lockcase: Heavy-gauge steel, 5-7/8" (149mm) x 4" (102mm) x 15/16" (24mm)
• Armored Front: Wrought brass, bronze, or stainless steel, 8" x 1-1/4"
• Latchbolt: 2-piece mechanical with anti-friction insert, 5/8" x 1" x 3/4" (19mm) throw
• Auxiliary Latchbolt: 9/16" (14mm) effective throw; deadlocking
• Deadbolt: One-piece stainless steel, 19/32" x 1-1/4" x 1" (25mm) throw
• Strike: Wrought brass, bronze, or stainless steel, ANSI straight lip, 4-7/8" x 1-1/4" x 1-1/8" lip to center
• Cylinder: Brass, 6-pin L4 keyway, 0-bitted standard
• Spacing: C. to c. knob/lever to cylinder: 3-5/8" (92mm); knob/lever to thumbturn: 2-7/16" (62mm)
• Certifications: ANSI/BHMA A156.13 Grade 1; UL/cUL UL10C 3-hour positive pressure; ADA A117.1; California State Fire Marshal; Windstorm/Hurricane certified
• Warranty: Ten-year mechanical; five-year MELR; two-year electrical

Professional Applications

• Commercial Office Buildings
• Healthcare Institutions and Medical Facilities
• Educational Facilities and Campus Buildings
• Government and Municipal Buildings
• Retail Establishments and Shopping Centers
• Industrial and Warehouse Facilities
• Multi-Tenant Residential and Mixed-Use Properties

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locksets are built from heavy-gauge steel and certified to ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1 — far exceeding standard requirements to ensure durability and longevity in the most demanding commercial environments. The ML20915-DS is backed by a ten-year mechanical warranty, a five-year MELR warranty, and a two-year electrical warranty, reflecting the brand's commitment to long-term reliability. With UL listing, UL10c compliance for 3-hour fire-rated doors, ADA compliance, and EcoFlex® technology delivering up to 89% energy savings, this lockset delivers professional-grade performance and sustainability for any high-traffic access control application.