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Corbin Russwin ML2055 PSP Classroom Mortise Lockset
Lock Operation Detailed
- Latchbolt by grip either side, unless outside grip is locked by key outside.
- Latchbolt by key when outside grip locked.
- Auxiliary latch deadlocks latchbolt.
- Inside grip always free.
- Outside grip remains locked unless unlocked by key.
- Note: Not available with indicator, specify ML2003.
The Corbin Russwin ML2055 PSP is a heavy-duty Grade 1 Classroom mortise lockset on Princeton Lever x P Escutcheon (PSP) trim. It is built on the ML2000 Series platform and is certified to A156.13 Series 1000, Operational and Security Grade 1.
Classroom Function -- What It Means
The Classroom function (ANSI/BHMA F05) lets a key lock the outside grip. Latchbolt by grip either side unless the outside grip is locked by key outside. When the outside is locked, the latchbolt is retracted from outside by key. The outside grip remains locked unless unlocked by key. The inside grip is always free for egress. An auxiliary latch deadlocks the latchbolt when the door is closed. This function is not available with an indicator -- the catalog directs that specification to ML2003.
Institutional Grade Features & Benefits
- Outside stays locked: the outside grip remains locked unless a key unlocks it. It does not stay unlocked after the key is removed.
- Free egress from inside: the inside grip retracts the latchbolt at all times.
- Grade 1 certified: Certified A156.13 Series 1000, Operational and Security Grade 1.
- Field handing: Handed; quick reversible. The lockset can be re-handed without disassembling the lock case; see page 87.
- Fire listing: UL/cUL-UL10C Positive Pressure
- Warranty: Ten-year mechanical warranty.
Typical Applications
The ML2000 Series is a Grade 1 mortise lock designed to meet the rigors of high-traffic commercial, institutional, industrial and government applications.
- Commercial applications
- Institutional applications
- Industrial applications
- Government applications
This classroom listing is specified on classroom and similarly key-locked openings where the outside remains locked unless a key unlocks it in those settings.
Technical Details
| Feature | Details |
|---|---|
| Model Number | ML2055 PSP |
| Function | Classroom (ANSI/BHMA F05) |
| Series | Corbin Russwin ML2000 |
| Certification | Certified A156.13 Series 1000, Operational and Security Grade 1. |
| Accessibility | Meets A117.1 Accessibility Code. |
| Fire Listing | UL/cUL-UL10C Positive Pressure |
| Handing | Handed; quick reversible. The lockset can be re-handed without disassembling the lock case; see page 87. |
| Door Thickness | 1-3/4" (44mm) standard. Optional door thicknesses available; see Quick Codes, page 81. |
| Backset | 2-3/4" (70mm). |
| Lockcase | Heavy-gauge steel, 5-7/8" (149mm) x 4" (102mm) x 15/16" (24mm). |
| Front | Heavy-gauge steel, 8" (203mm) x 1-1/4" (32mm) x -3/32" (2mm). Accommodates flat doors and doors beveled 1/8" (3mm) in 2" (51mm). |
| Armored Front | Wrought brass, bronze or stainless steel attached by machine screws to lockcase front. |
| Latchbolt | 2-piece mechanical with anti-friction insert, 5/8" (16mm) x 1" (25mm) x 3/4" (19mm) throw. |
| Auxiliary Latch | 9/16" (14mm) effective throw and 3/8" (10mm) effective auxiliary latch deadlocking. |
| Strike | Wrought brass, bronze or stainless steel, ANSI straight lip standard, 4-7/8" (124mm) x 1-1/4" (32mm) x 1-1/8" (29mm) lip to center. |
| Cylinder (standard) | Brass, 6-pin, L4 keyway, 0-bitted standard. |
| Hubs | Standard knob/lever hub is steel, 5/16" (8mm) |
| Trim | Princeton Lever x P Escutcheon |
| Warranty | Ten-year mechanical warranty. |
| Finish with BHMA code | 626 - US26D Satin Chrome or 630 - US32D Satin Stainless or 613 - US10B Oil Rubbed Bronze or 613E - US10BE Oil Rubbed Bronze Equal or BSP - Black Suede Powder Coat or 605 - US3 Polish Brass or 606 - US4 Satin Brass or 612 - US10 Satin Bronze or 619 - US15 Satin Nickel or 625 - US26 Polish Chrome or 629 - US32 Polish Stainless or WSP - White Suede Powder Coat or 611 - US9 Bright Bronze or 618 - US14 Bright Nickel or 722 - Black Oxidized Bronze, Oil Rubbed |
| Corbin Russwin Electrified Lock Options | M91 - Latchbolt Monitoring (LBM) or M92 - Request to Exit (REX) or M105 - Security Monitoring (DPS) |
| Corbin Russwin Keyways | L4 Keyway or CL6 - LFIC less Core or LC - Less Cylinder or CL7 - LFIC 7-pin Less Core or CLS6 - SFIC 6-pin Less Core or CLS7 - SFIC 7-pin Less Core |
| Brand | Corbin Russwin |
| ANSI Mortise Lock Function | F05 - Classroom |
| Trim Design | PSP |
| Series | Corbin Russwin - ML2000 Series |
| Door Handing | Field Reversible |
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