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Von Duprin 379L Key Locks and Unlocks Control Trim for 55 Series Rim Exit Devices
370 Series Heavy-Duty Commercial Exit Device Trim with Mortise Cylinder Function
The Von Duprin 379L is a Grade 1 heavy-duty exit device control trim from the 370 Series, engineered specifically for use with Von Duprin 55 Series rim exit devices. Featuring a key locks and unlocks function with a mortise cylinder, this trim delivers reliable access control in demanding commercial environments. Certified to ANSI/BHMA A156.3 2014 Grade 1 standards, the 379L is built to meet the rigorous performance requirements of high-traffic facilities while offering the modular flexibility that Von Duprin is known for.
Professional Features & Benefits
- Key Locks and Unlocks Function: Mortise cylinder operation provides secure, keyed control over exit device locking and unlocking, ideal for controlled-access commercial openings.
- ANSI/BHMA A156.3 2014 Grade 1 Certified: Meets the highest commercial grade standard for exit device trim, ensuring long-term durability and code compliance in heavy-duty applications.
- Fire-Rated Compliance: Certified to ANSI/UL 10C and CAN/ULC-S104 (fire-rated configurations), supporting installation on fire-rated door assemblies where required.
- Additional Code Certifications: Also listed to ANSI/UL 305 and CAN/ULC-S132, providing broad compliance coverage across North American building and life safety codes.
- Modular 370 Series Design: Part of Von Duprin's 370 Series Control Trims, engineered for compatibility with the 55 Series exit device platform and designed to accept new options as they are developed.
- Investment Protection: Von Duprin's flexible, modular architecture allows facilities to upgrade and add functionality to existing devices cost-effectively as mechanical and electronic technology needs evolve.
- Heavy-Duty Commercial Grade: Rated for heavy-duty use in commercial applications, delivering consistent performance in high-traffic openings such as offices, schools, and institutional facilities.
- Wide Lever and Finish Availability: Compatible with a wide variety of levers and finishes available within the 55 Series platform, enabling aesthetic coordination across a facility.
Technical Specifications
- Subcategory: Exit Device Trim
- Series: 370 Series
- Grade: Grade 1
- Duty Level: Heavy Duty
- Function Description: Key Locks and Unlocks
- Product Group: Exit Devices and Trim
- Product Subgroup: Exit Device Trim
- Product Type: Exit Device Trim
- Commercial/Residential: Commercial
- Cylinder and Keyways: Mortise Cylinder
- Product Model: 379L
- Door Hand Direction: Yes
- Product Category: Exit Devices and Trim
- Department: Door Hardware
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 Von Duprin Quality?
Von Duprin 370 Series exit device trim products are certified to ANSI/BHMA A156.3 2014 Grade 1 standards and carry fire-rated listings including ANSI/UL 10C and CAN/ULC-S104, reflecting a commitment to code-compliant, heavy-duty performance. The modular design philosophy ensures that facilities can adapt and expand their door hardware capabilities over time without replacing entire systems. Engineered for demanding commercial applications, the Von Duprin 379L delivers the dependable, investment-protecting performance that security professionals rely on.
Manufacturer Resources
Von Duprin 55 Series Catalog
Product Specs
- Subcategory:
- Exit Device Trim
- Series:
- 370 Series
- Grade:
- Grade 1
- Duty Level:
- Heavy Duty
- Function Description:
- Key Locks and Unlocks
- Product Group:
- Exit Devices and Trim
- Product Subgroup:
- Exit Device Trim
- Product Type:
- Exit Device Trims
- Commercial/Residential:
- Commercial
- Cylinder and Keyways:
- Mortise Cylinder
- Product Model:
- 379L
- Door Hand Direction:
- Yes
- Product Category:
- Exit Devices and Trim
- Department:
- Door Hardware
Von Duprin VON-379L-626 – Frequently Asked Questions
1) Will the Von Duprin 379L trim work on any exit device, or only certain ones?
The 379L is built for Von Duprin 55 Series rim exit devices, and that is the platform it mounts to. It won't fit a surface vertical rod or mortise device, and it isn't a universal trim. If your device is a 55 Series rim device, this is the matching 370 Series control trim; if it's anything else, you need the trim built for that device family.
2) What does the key locks and unlocks function on the 379L actually do at the door?
Key locks and unlocks means the key toggles the outside lever between locked and unlocked and leaves it there. Turn it one way and the outside lever stays free for anyone to pull the door open; turn it back and the lever is dead until someone keys it again. That's different from a nightlatch or classroom trim, where the key only works the latch while you're holding it. Use it where you want a door unlocked through business hours and secured after, without a person standing at it. Push bar egress from the inside is unaffected either way.
3) Do I have to specify handing when I order the 379L exit trim?
Yes, handing is required and not field reversible on the order. You pick RHR (right hand reverse) or LHR (left hand reverse). Exit devices are always on the push side, so the door is reverse bevel by definition; stand outside the opening, and if the hinges are on your right it's RHR, on your left it's LHR. Getting this wrong means the lever points the wrong way and the trim goes back.
4) Does the Von Duprin 379L come with a cylinder?
The 379L takes a mortise cylinder, and that cylinder is a separate line item you specify to match your keying. Order it in the keyway your facility is already on, with the cam Von Duprin calls for, so it keys into the existing system rather than starting a new one. Locksmiths standardizing a building usually order the trim and the cylinders on the same job so everything lands keyed alike or master keyed the first time.
5) Is the 379L exit trim rated for a fire door?
Fire rated configurations of the 379L are certified to ANSI/UL 10C and CAN/ULC-S104, so it can go on a fire rated door assembly where the opening calls for it. It also carries ANSI/UL 305 and CAN/ULC-S132 listings for panic hardware, and it is certified to ANSI/BHMA A156.3 2014 Grade 1. That combination is what an institutional or MRO spec is usually asking for on a rated egress opening.
6) What's the difference between the 379L key locks and unlocks trim and a nightlatch trim?
They solve different problems. The 379L holds a state: key it unlocked and the outside lever stays free until someone keys it locked again. A nightlatch trim, like the Sargent 704ET or the Corbin Russwin VT957ET, only retracts the latch while the key is turned, so the door is secure the rest of the time and there's no way to leave the lever free. Pick the 379L for a door that needs to be open all day and locked at close. Pick nightlatch for a service or back door that should never sit unlocked.
7) I need the outside lever always locked with key access only. Is the 379L the right trim?
No, that's storeroom function, and the 379L is not it. Key locks and unlocks lets someone leave the lever unlocked, which is exactly what a storeroom opening is meant to prevent. For always-locked with key entry, look at the Design Hardware KIL storeroom trim, the Marks USA M195F storeroom lever/rose trim, or the Pamex E9000 storeroom trim, all storeroom function. Match the trim to your device family before you order.
8) What is the closest equivalent to a Von Duprin 379L if the exit device on the door is not a Von Duprin 55 Series?
The Von Duprin 379L is a heavy duty, Grade 1 exit device trim with a key locks and unlocks function driven by a mortise cylinder, built for the 55 Series rim device platform. Trim is device-specific, so on a different device you match the function on that manufacturer's own trim line. The Falcon 510L is a heavy duty classroom function exit device trim for 24/25 Series devices, and the Sargent 704ET is a Grade 1 heavy duty night latch lever trim for 700 Series devices with field reversible operation. Confirm the device series stamped on the touchbar or rail before ordering trim, because a trim built for one platform will not pick up the latch retraction on another.
9) What should I use instead of a 379L when the outside lever should stay locked at all times and the key only retracts the latch?
The Von Duprin 379L holds a key locks and unlocks function, meaning the key toggles the outside trim between locked and unlocked and it stays where the key leaves it. If the opening should never sit unlocked, a night latch trim is the different function: the Sargent 704ET is a Grade 1 heavy duty night latch lever trim, the Sargent 704-ETL is a Grade 1 heavy duty night latch lever trim with a key retract function, and the Corbin Russwin VT957ET is a nightlatch escutcheon trim for ED5000 Series devices. Storeroom function is the other route, held by the Design Hardware KIL Storeroom trim for 1000 and 2000 Series devices and the Tell EDELT80 escutcheon lever trim.
10) Can I swap a 379L for an electrified exit trim so the door can be unlocked from the access control panel?
No, the Von Duprin 379L is a mechanical trim; the key at the door is what locks and unlocks it. Remote control from a panel calls for an electrified trim instead. Command Access builds the 230L electrified Von Duprin exit trim for V96/36/23 Series devices with 12V/24V operation and fail safe or fail secure options, along with the ET15, ET25, and ET26 electrified trims, the ET26 being Grade 1 with a field reversible design. Falcon offers the 510L-FSA/FSE, a heavy duty electrified trim for 25 Series devices. Dormakaba covers standalone credential control instead of panel wiring, with the E-Plex 201U electronic pushbutton exit trim and the PowerPlex P201U for rim, mortise, and SVR devices.
11) What lever designs and finishes can I get on the Von Duprin 379L trim?
Seven lever designs cover the 379L: 01, 02, 03, 06, 07, 12 and 16. Finishes run to eight: 605 bright brass, 606 satin brass, 612 satin bronze, 613 oil rubbed bronze, 625 bright chrome, 626 satin chrome, 643E aged bronze, and 693/SPBLK black painted. Both are required choices on the order, so a property manager matching existing openings should pull the lever design and finish off the trim already installed before specifying.
12) Can I get the 379L electrified so access control can unlock the door remotely?
The 379L is a mechanical trim, keyed only, so it won't take a card reader or a request-to-exit signal on its own. For an electrified lever trim on a Von Duprin device, Command Access builds the 230L electrified Von Duprin exit trim for the V96/36/23 series, with 12V/24V operation and fail safe or fail secure options, and the ET15, ET25 and ET26 electrified trims cover other device platforms. Match the electrified trim to your specific device series, not just to the brand.
13) Can I add the 379L to a 55 Series exit device that's already installed, or do I have to replace the whole device?
The trim swaps without touching the device. Von Duprin's 370 Series is modular by design and built to the 55 Series platform, so you can change the outside trim function on an existing 55 Series rim device rather than pulling and rebuying the device. That's the usual path when a door's use changes, say an office entrance that now needs to be keyed open in the morning and locked at night. You will still need to specify handing and the lever design, and supply the mortise cylinder.
14) Is the Falcon 179L the same trim as the Von Duprin 379L?
They are not the same trim and the model numbers being one digit apart is coincidence. The Von Duprin 379L is a heavy duty Grade 1 trim with a key locks and unlocks function for the 55 Series platform. The Falcon 179L is a medium duty lever control trim in the classroom function for 1790 Series devices. Two differences decide it: duty level, heavy duty versus medium duty, and function, key locks and unlocks versus classroom. The Falcon 212L is likewise a medium duty 20 Series trim, but it is a blank escutcheon with shear pin protection rather than a keyed control trim.
15) Our door needs the outside lever always live so anyone can pull it open. Is a 379L the right trim?
No. The Von Duprin 379L is a keyed control trim; the key determines whether the outside lever operates. For an opening where the outside lever should always retract the latch, passage function trim is the correct family. The Arrow SRX01 is a passage function trim with a Sierra lever and rose for ED910, S1150, and S1250 devices. Corbin Russwin covers passage across three device lines: the 3310AET for ED300 Series, the x810ET for ED4000 Series, and the x910ET heavy-duty trim for the ED5200S, ED5200, ED5400, and ED5800 Series. Marks USA M195N is a lever and rose trim in the M195N Series. All of these are device-specific, so match the exit device first.
16) I need Grade 1 keyed exit device trim but the door already has a Schlage C keyway I am keying to. What are my options?
The Von Duprin 379L takes a mortise cylinder, so the keyway follows whichever mortise cylinder is fitted. If a factory Schlage C keyway is preferred instead, the Design Hardware KIL Entry trim and the KIL Storeroom trim are both Grade 1 exit trims for 1000 and 2000 Series devices with a Schlage C keyway and a flat lever, the difference being entry versus storeroom function. Design Hardware also offers the LE08 Grade 1 entry function trim for 1000R and 2000R devices with a flat lever and escutcheon, and the 2P-03NL Grade 1 pull trim with a cylinder hole in a night latch configuration for the same devices.
17) The specification calls for a thumbpiece instead of a lever on the keyed exit trim. What replaces a 379L?
The Von Duprin 379L is a lever trim, ordered with a lever design and a handing. When the drawing calls for a thumbpiece pull, the Tell EDTHP53 is a thumbpiece exit device trim in a keyed entry function, and the Dexter ED1000T-CLRM-TP-NC is a Grade 1 classroom function trim combining thumbpiece, pull plate, and cylinder, supplied less cylinder. The Tell EDPT is a plain pull trim with a cylinder hole, also less cylinder, if the requirement is a pull rather than a thumbpiece. The Tell trims list a door thickness range of 1-3/8 inch to 1-3/4 inch.
18) What Grade 1 heavy duty storeroom trim compares to the Von Duprin 379L for a facility standardizing on locked-outside openings?
The Von Duprin 379L is Grade 1 and heavy duty with a key locks and unlocks function, which lets staff leave an opening unlocked for a shift. For openings that must stay locked outside at all times, the Pamex E9000 is a Grade 1 heavy duty storeroom function trim with an L3 lever and a door thickness range of 1-3/8 inch to 2 inch. Marks USA M195F is a storeroom function lever and rose trim with spring loaded roses for M9900 touchbar devices. Sargent 744 is a Grade 1 freewheeling trim in a night latch function where the key retracts the latch, built for 8700 and 8900 Series surface vertical rod and mortise devices, which is the choice when the lever should spin free rather than resist force.
19) I need to specify handing for the 379L. Which comparable trims avoid that step?
The Von Duprin 379L requires a handing selection, ordered as RHR or LHR, so the door swing has to be confirmed before the order goes in. Two comparables are built to avoid that: the Sargent 704ET night latch lever trim is field reversible, and the Command Access ET26 electrified trim has a field reversible design. Field reversible trim can be set to either hand at the door, which is the difference that matters when a crew is carrying stock to several openings and does not want to sort by swing.
20) Is the Von Duprin 379L suitable for a house or apartment unit door?
No. The 379L is commercial hardware, Grade 1 heavy duty exit device trim that mounts to a 55 Series rim panic device. Residential entry doors don't carry panic hardware, so there's nothing for it to attach to. It does have a place in multi-tenant residential buildings, on common egress doors, stairwells and lobby entrances where panic devices are already installed.
21) For an entrance door where the lever should be keyed for entry rather than toggled locked and unlocked, what trim fits instead of a 379L?
The Von Duprin 379L uses a key to lock and unlock the outside trim, which holds its state until keyed again. A keyed entry function trim is the alternative where the key opens the door on each use. The Tell EDELT53 is an escutcheon lever trim in a keyed entry function with a door thickness range of 1-3/8 inch to 1-3/4 inch. Delaney offers the 500L exit device exterior trim in an entrance function across three lever styles, the CT, MD, and SD levers, if the lever profile is being coordinated with other openings. Design Hardware LE08 is a Grade 1 entry function trim for 1000R and 2000R devices.
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Absolutely. The Von Duprin VON-379L-626 is backed by a manufacturer’s warranty.
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