Corbin Russwin ML20915 Grade 1...
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$1,884.38
$1,104.45
Corbin Russwin ML20915 No Cylinder Override, Both Grips Lock, Mortise Electrified Lever Lockset, DS-Dirke Lever

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

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Model: ML20915-DSA-626-RH-SAF
From the ML2000 Series Collection
$1,884.38
$1,104.45
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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.

Product Specs

Subcategory:
Mortise Locks
Product Group:
Mechanical Locks
Series:
ML2000 Series
Standard Latch:
3/4" Latchbolt
Standard Strike:
ANSI-Straight Lip,1-1/8" (29mm) Lip to Center
Product Subgroup:
Mortise Lockset
Product Type:
Mortise Locks
Commercial/Residential:
Commercial
Lock Type:
Mortise
Lock Function:
Fail Safe/Fail Secure
Product Model:
ML20906
Collection:
ML2000 Series
Product Function:
Fail Safe/Fail Secure
Door Hand Direction:
Field Reversible
Door Thickness Range:
1-3/4"
Product Substrate:
Steel
Product Category:
Mechanical Locks
Backset (Distance):
2-3/4"
Department:
Door Hardware

Corbin Russwin ML20915-DSA-626-RH-SAF – Frequently Asked Questions

1) What is the difference between the fail safe and fail secure versions of the Corbin Russwin ML20915?
Both are offered on the ML20915, and you pick one at order time. Fail safe unlocks the lever when power drops, which is what you want on an egress or stair-side opening that has to release in a power failure. Fail secure stays locked without power, which is the usual choice for a secured room where losing power must not open the door. Same lock body and Dirke lever either way, so the only real decision is what your access control sequence and local code call for.
2) Will the ML20915 mortise lockset fit a 1-3/4 inch commercial door with a 2-3/4 inch backset prep?
Yes. The ML20915 is built for a 2-3/4 inch backset and 1-3/4 inch door thickness as standard, with optional thicknesses available up to 4 inches. The lockcase itself measures 5-7/8 x 4 x 15/16 inches and the armored front is 8 x 1-1/4 inches, so it drops into a standard ANSI mortise pocket.
3) Does the ML20915 electrified mortise lock have a key cylinder override?
No. The ML20915 is the no cylinder override, both grips lock function: when the lock is electrically secured, both levers are locked and there is no mechanical key bypass on the lock. If you need key override on the outside lever, specify a different ML20900 function instead of this one. Worth settling before you order, because you cannot add the override later.
4) Do I have to order the ML20915 handed, or can it be reversed in the field?
Order it left-handed or right-handed, but handing is not a trap here. The latchbolt is patented Quick Reversible, so it can be re-handed in the field without taking the lock case apart.
5) Can this mortise lock go on a 3-hour fire rated door?
Yes. The ML2000 Series electrified mortise lock is UL and cUL listed, UL10C positive pressure, and ULC listed for fire doors rated up to and including 3 hours, on single doors up to 4 x 10 feet or pairs up to 8 x 10 feet. It is also ADA A117.1 compliant and California State Fire Marshal listed.
6) Will the ML20915 latch into my existing ANSI strike?
It should. The lock ships with a 3/4 inch throw two-piece anti-friction latchbolt and an ANSI straight lip strike, 4-7/8 x 1-1/4 inches with 1-1/8 inch lip to center. If your frame already has a standard 4-7/8 inch ANSI strike prep with that same lip-to-center, the existing strike works. The auxiliary latchbolt has a 9/16 inch effective throw and deadlocks the latch.
7) What do I need to specify when ordering a Corbin Russwin ML20915-DS?
Five things: function (fail safe or fail secure), handing (left or right), finish (625 bright chrome or 626 satin chrome), trim style (A rose, M escutcheon, or N escutcheon), and whether you want request-to-exit monitoring. The lever is the cast Dirke (DS) design on all of them. RX monitoring is the one people forget, and it is what tells your access control panel someone used the inside lever to leave.
8) What is the closest electrified mortise lock to the Corbin Russwin ML20915-DS from another brand?
The Schlage L9092EU with 03A trim is the nearest peer: it is a heavy duty mortise lock with an electrically controlled outside lever, keyed outside, request-to-exit monitoring, and 12/24VDC operation on 1-3/4 inch doors. The ML20915-DS is also a 1-3/4 inch door, 2-3/4 inch backset electrified mortise lockset with Fail Safe and Fail Secure versions and an option for request to exit monitoring, but it is a both-grips-lock function with no cylinder override, so both levers are controlled electrically rather than one lever plus a key cylinder outside.
9) I need a key override on an electrified mortise lock - what should I use instead of the ML20915-DS?
The ML20915-DS is a No Cylinder Override, Both Grips Lock function, so there is no mechanical key bypass of the electrical state. If the opening needs a key override, the Schlage L9092EU with 03A trim is keyed on the outside, or on the keypad side the BEST 45HZ EZ Series electronic keypad mortise lock includes a key override function. Both remain mortise-prep locks like the ML20915-DS.
10) Can I use a standalone keypad or credential mortise lock instead of the wired ML20915-DS?
Yes, if the opening does not need to be tied into a wired access control panel. The ML20915-DS is an electrified lockset with Fail Safe and Fail Secure versions intended for panel-driven access control. Standalone alternatives in mortise prep include the Alarm Lock DL3500CR Trilogy Grade 1 classroom-function lock with 300 user codes, the Schlage CO-100 standalone electronic mortise lock with keypad reader, and the TownSteel FME-2000 Grade 1 classroom mortise lockset with RFID. Those are credential-at-the-door devices rather than remotely controlled fail safe/fail secure locks.
11) Which mortise products look like a substitute for the ML20915-DS but are not?
Several mortise-family items will not do the job. The Sargent 130KB and 130W are mortise thumbturns, trim pieces only. The Sargent 4874 is a double cylinder mortise deadbolt with a 2-3/4 inch backset and no lever latch function. The Schlage L0170 is half dummy trim, and the Emtek 3019 Brisbane, 3102 Memphis, 3104 Hamilton and 3106 Manhattan mortise entrance sets are dummy function. The Kaba Ilco 185 Series is a deadbolt. The ML20915-DS is a complete electrified latching lever lockset with Fail Safe and Fail Secure operation.
12) Can I use a Baldwin mortise lock body in the same prep as the ML20915-DS?
No. The Baldwin 6301 entry/apartment and 6310 entry/storeroom mortise lock bodies use a 2-1/2 inch backset, while the ML20915-DS is a 2-3/4 inch backset lockset, so the cross bore and case pocket locations differ. The Baldwin bodies are also mechanical, with no fail safe or fail secure electrical operation.
13) Is the ML20915 Grade 1, and how many cycles is it rated for?
Certified to ANSI/BHMA A156.13 Series 1000, Operational and Security Grade 1, with a heavy-gauge steel lockcase. Corbin Russwin publishes UL cycle testing of 14.5 million cycles (verification ID V875753), which is well past the Grade 1 minimum, so it holds up on high-traffic corridor and entry openings.
14) Can I use my existing Corbin Russwin keyway with this lockset, or other brands of cylinder?
The ML2000 Series works with new or existing Corbin Russwin key systems, including the patented Access 3 and Pyramid systems, and it accepts most other manufacturers' cylinders. Standard cylinder supply is brass, 6-pin L4 keyway, 0-bitted, with 3-5/8 inch center-to-center from lever to cylinder. Note that the ML20915 function itself has no cylinder override, so cylinder choice matters only where the trim you select uses one.
15) Should I use an electrified mortise lock like this or a standalone keypad mortise lock?
It comes down to whether you have wiring and a panel. The ML20915 is a wired electrified lock: it needs power run to the opening and it reports to an access control system, which is why it offers fail safe/fail secure and request-to-exit monitoring. If there is no wire to the door, a standalone battery lock is the practical route, for example the Alarm Lock DL3500CR Trilogy Grade 1 with classroom function and 300 user codes, or the Schlage CO-100 keypad mortise lock. If you want credentials and a network without hard wiring, the Alarm Lock DL1300NW Trilogy Networx wireless lock covers that.
16) What should I use instead of the ML20915-DS on a behavioral health or ligature-resistant opening?
For anti-ligature openings, the TownSteel MRX-L-01 is a Grade 1 heavy duty anti-ligature lever mortise lockset in stainless steel and the MRX-A-01 is the same passage function with ligature-resistant arch trim, both for 1-3/4 inch doors; the Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset that is ligature resistant and ADA compliant. Those are passage devices. The ML20915-DS is the electrified route, with Fail Safe and Fail Secure operation and Behavioral Health BHSS/BLSS trim among its ML2000 trim designs.
17) What is a simpler mechanical mortise lock if the opening does not need electrification?
If there is no power at the door, a mechanical Grade 1 mortise lock covers it. The Accentra 8805FL is a Grade 1 storeroom mortise lock, the Cal-Royal NM8080 is a Grade 1 storeroom lockset with an interchangeable core option, and the Cal-Royal NM8050 is a Grade 1 office/entrance lockset with auxiliary deadlatch, all for 1-3/4 inch doors in the Cal-Royal cases. The ML20915-DS is a 1-3/4 inch door electrified lockset with Fail Safe and Fail Secure versions and an optional request-to-exit switch, which those mechanical locks do not provide.
18) What is the difference between the ML20915-DS and the Command Access ML190 electrified mortise lock?
The Command Access ML190 Series is a heavy-duty motorized mortise lock with field selectable EL/EU operation on 24VDC in a storeroom function, so one lock can be set to either electrically locked or electrically unlocked in the field. The Corbin Russwin ML20915-DS is ordered as a specific Fail Safe or Fail Secure variant instead, and it is a both-grips-lock function with no cylinder override.
19) Will a wireless mortise lock work in place of the ML20915-DS on a 3-hour fire door?
The Schlage Electronics LEMD-GRW is a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader, mobile-enabled deadbolt with LED, and a 3 hour fire rating, so it suits a fire door without running power to the frame. The ML20915-DS is UL10C listed for fire doors rated up to and including 3 hours as well, but it is a wired electrified lock driven by the access control system, with Fail Safe and Fail Secure operation and an optional request-to-exit switch.
20) For a classroom security opening, is the ML20915-DS the right lock or is there a better fit?
A classroom-security opening that must lock from inside without opening the door is usually handled by a dedicated classroom lock: the Marks USA LA318GJ is a Grade 1 classroom security indicator mortise lockset with ANSI strike and steel escutcheon for 1-3/4 inch doors, the Cal-Royal NM8070 is a Grade 1 classroom mortise lockset with auxiliary deadlatch, and the TownSteel FME-4000 is an electronic intruder classroom mortise lockset with RFID. The ML20915-DS is instead the access-control lock, electrified Fail Safe or Fail Secure with both grips locking and optional request-to-exit monitoring.
21) Do the Alarm Lock Trilogy mortise locks fit the same doors as the ML20915-DS?
Not the same range. The Alarm Lock DL2700CR, DL3500CR and DL4500 Series mortise locks are rated for 1-5/8 inch to 1-7/8 inch doors. The Corbin Russwin ML20915-DS is a 1-3/4 inch door lockset as standard, with optional thicknesses available, and the ML2000 case will take doors outside the narrow Trilogy window. Check the leaf thickness before committing either way.
22) Is there a Grade 1 alternative to the ML20915-DS if I want card or mobile credentials at the door?
Yes. The Dormakaba E-Plex E5086 is a Grade 1 entry/egress electronic pushbutton and card lock in a back-to-back mortise configuration, and the Schlage LEMD-GRW is a Grade 1 wireless mortise lock with a 125kHz proximity reader and mobile-enabled operation. Both read credentials at the door. The ML20915-DS is ANSI/BHMA A156.13 Grade 1 as well but takes its lock and unlock command from the access control system in Fail Safe or Fail Secure form.
23) Is the Dormakaba Saffire LX-I-M002 equivalent to the ML20915-DS?
They are not graded the same. The Dormakaba LX-I-M002 Saffire is an electronic RFID mortise lockset with BLE mobile access at BHMA Grade 2. The Corbin Russwin ML20915-DS is certified to ANSI/BHMA A156.13 Series 1000, Operational and Security Grade 1. If the spec calls for Grade 1 on a high-traffic opening, the Saffire will not satisfy it.
24) What is the difference between the rose and escutcheon trim options on the ML20915?
Rose trim (A) is the compact round plate behind the lever and is the leaner look on a narrower stile. The two escutcheon options (M and N) are full plates covering the lock area, which gives more coverage over an older or patched door face and is what you need if you want the locked/unlocked status indicator, since that option is offered on sectional and escutcheon trim. All trim designs are thru-bolted for alignment and added security.
25) What finishes does the ML20915-DS come in, and will it match the other doors in my building?
Two finishes: 625 bright chrome (polished) and 626 satin chrome. 626 is the common commercial brushed look and is what most existing office, school, and healthcare openings already wear, so that is usually the match. If your other doors are polished chrome, go 625. There is no brass or bronze option on the DS Dirke lever configuration.
26) Does the ML20915 include a deadbolt?
The ML2000 lock case carries a one-piece stainless steel deadbolt measuring 19/32 x 1-1/4 inches with a 1 inch throw, and lever-to-thumbturn center spacing is 2-7/16 inches where a thumbturn is used. The ML20915 function itself is both-grips-lock electrified control, so plan the deadbolt operation around the function and trim you specify rather than assuming a keyed deadbolt.
27) If I standardize on the ML2000 mortise body, can I change functions later without buying new locks?
Largely, yes. The ML2000 platform supports 12 functions configurable from a single ML2054 lockbody, which is the reason facilities standardize on it: one body on the shelf covers office, storeroom, classroom and similar changes without restocking. Motorized electric latch retraction (MELR) is also available on the ML20900 electrified series if you later need latch retraction tied to access control.
28) Are the Hager 3800 Series mortise locks an alternative to the ML20915-DS?
Only for openings that need no access control. The Hager 3810S and 3810E are Grade 1 passage mortise locks with a 2-3/4 inch backset for 1-3/4 inch to 2-1/2 inch doors, in rose and escutcheon trim respectively, and the 3850E is an office function non-keyed lever with escutcheon. They share the ML20915-DS 2-3/4 inch backset, but the ML20915-DS is an electrified Fail Safe/Fail Secure lockset and the passage versions are always free to operate.
How fast can I get the Corbin Russwin ML20915-DSA-626-RH-SAF delivered?
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Can I return it if it doesn’t work for me?
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Does the Corbin Russwin ML20915-DSA-626-RH-SAF come with a warranty?
Absolutely. The Corbin Russwin ML20915-DSA-626-RH-SAF is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Corbin Russwin ML20915-DSA-626-RH-SAF?
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