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Von Duprin 375L Lever Trim for 55 Series Exit Device with Mortise Cylinder, Grade 1
370 Series Heavy-Duty Commercial Exit Device Trim Solution
The Von Duprin 375L is a professional-grade lever trim designed specifically for use with the 55 Series Exit Device, offering a Key Locks and Unlocks function with mortise cylinder compatibility. As part of the 370 Series Control Trims lineup, this heavy-duty, Grade 1 certified trim is engineered for commercial applications where flexibility, durability, and code compliance are essential. Certified to ANSI/BHMA A156.3 2014 Grade 1 standards, ANSI/UL 10C (fire-rated configurations), ANSI/UL 305, CAN/ULC-S104 (fire-rated configurations), and CAN/ULC-S132, this trim delivers the performance and compliance demanded by professional door hardware installations.
Professional Features & Benefits
- ANSI/BHMA Grade 1 Certified: Meets ANSI/BHMA A156.3 2014 Grade 1 standards, ensuring heavy-duty performance and compliance for demanding commercial environments.
- Fire-Rated Compliance: Certified to ANSI/UL 10C and CAN/ULC-S104 for fire-rated configurations, supporting life-safety code requirements in applicable installations.
- UL 305 & CAN/ULC-S132 Listed: Additional listings under ANSI/UL 305 and CAN/ULC-S132 provide broad compliance coverage for a wide range of commercial applications.
- Key Locks and Unlocks Function: Provides controlled access with a Key Locks and Unlocks function, allowing authorized personnel to manage door access efficiently.
- Mortise Cylinder Compatibility: Designed to accept a mortise cylinder, enabling integration with existing keying systems for streamlined access control management.
- 55 Series Exit Device Compatibility: Engineered exclusively for use with the Von Duprin 55 Series Exit Device, ensuring precise fit, reliable operation, and maintained certifications.
- Modular & Flexible Design: Part of Von Duprin's modular 370 Series platform, this trim supports easy upgrades and the addition of new options as facility needs evolve, protecting your hardware investment.
- Heavy-Duty Construction: Rated Heavy Duty for commercial use, this lever trim is built to withstand the rigors of high-traffic facilities while maintaining smooth, dependable operation.
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
- Handle Type: Lever
- Product Model: 375L
- 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 exit device trim products deliver professional-grade reliability backed by ANSI/BHMA A156.3 2014 Grade 1 certification and multiple UL and ULC listings, including fire-rated compliance under ANSI/UL 10C and CAN/ULC-S104. The 370 Series modular platform is engineered to adapt as facility needs change, offering a cost-effective way to upgrade and expand functionality on existing 55 Series devices. For commercial applications where dependable performance, code compliance, and long-term investment protection are paramount, Von Duprin delivers the trusted quality 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
- Handle Type:
- Lever
- Product Model:
- 375L
- Door Hand Direction:
- Yes
- Product Category:
- Exit Devices and Trim
- Department:
- Door Hardware
Von Duprin VON-375L-613 – Frequently Asked Questions
1) Do I have to specify handing when ordering the Von Duprin 375L trim?
Yes, handing is a required selection on the 375L, and the choices are RHR (right hand reverse) or LHR (left hand reverse). Exit devices are on the push side of an outswinging door, so the door is always a reverse hand. Stand outside the opening: if the door swings toward you and the hinges are on your right, that is RHR. Get this wrong and the lever will be upside down on the door.
2) Does the Von Duprin 375L come with a cylinder, and what kind do I need?
The 375L takes a mortise cylinder, and you order that cylinder separately keyed to your system. Budget for one mortise cylinder per trim, in your keyway, with the cam Von Duprin specifies for 370 Series trim. A rim cylinder will not work here, so if your building is standardized on rim cylinders for the rest of the exit devices, this trim is the one that breaks the pattern.
3) What does the key locks/unlocks function on the Von Duprin 375L actually do at the door?
Turning the key changes the state of the outside lever and leaves it there. Key one way and the lever is free to retract the latch, so anyone can pull the door open. Key the other way and the lever goes rigid, so entry is key-only. That is different from a nightlatch trim, where the key retracts the latch only while you are turning it. Use the 375L where staff unlock a door in the morning and lock it at close without needing a key each time. Egress from the inside is always free through the 55 Series push bar regardless of what the lever is doing.
4) Is the Von Duprin 375L trim approved for a fire rated door opening?
The 375L carries ANSI/UL 10C and CAN/ULC-S104 certification for fire rated configurations, along with ANSI/UL 305 and CAN/ULC-S132 listings. Two things matter on a fire door: the trim has to be a locking function with no mechanical dogging on the device, and the whole assembly has to be the labeled combination. Because the 375L locks the lever rather than leaving it free, it is the right style of trim for a fire rated 55 Series opening. Several trims in this category are not rated at all, so do not swap in a generic escutcheon on a labeled door.
5) The door is on an access control system and needs to unlock electrically. What do I use instead of the 375L?
The Von Duprin 375L is a mechanical trim keyed by a mortise cylinder, so it will not respond to a card reader or a remote release. For an electrically controlled opening, the Command Access ET15, ET25 and ET26 are electrified exit trims with 12V/24V operation and fail safe or fail secure options, with the ET26 built Grade 1 and field reversible. The Command Access 230L is the electrified version of the Von Duprin 230L trim for V96/36/23 series devices. The Falcon 510L-FSA/FSE is an electrified heavy duty lever trim for 25 series devices. Electrified trim has to be matched to the specific exit device family, so confirm the device model before ordering.
6) What is the closest equivalent to a Von Duprin 375L lever trim from another manufacturer?
The Von Duprin 375L is a Grade 1 heavy duty lever trim with a mortise cylinder and a key locks/unlocks function. The nearest peers in function class are the Falcon 510L, a heavy duty classroom function exit device trim with a lever handle, and the Pamex E9000, a Grade 1 storeroom function heavy duty trim with an L3 lever that fits doors 1-3/8 inch to 2 inch thick. Note the function differs: the 375L key locks and unlocks the lever, the Falcon 510L is classroom, and the Pamex E9000 is storeroom, where the outside lever stays locked and the key only retracts the latch. Match the function to how the opening is used before substituting, and confirm the trim is made for the exit device already on the door.
7) I do not need the outside lever to lock and unlock, I just need a keyed pull. What is a simpler exit trim?
When the opening only needs a key to retract the latch and no lever control, a night latch or pull trim covers it with fewer moving parts than the Von Duprin 375L, which is built to key lock and unlock the lever. The Sargent 704ET is a Grade 1 heavy duty night latch lever trim that is field reversible, the Sargent 704-ETL is a Grade 1 heavy duty night latch lever trim with a key retract function, and the Tell EDPT pull trim is a pull with a cylinder hole supplied less cylinder for doors 1-3/8 inch to 1-3/4 inch. The Dexter ED1500 nightlatch trim uses a raised lip pull plate instead of a lever, which suits doors where nothing should project.
8) Can I add the 375L lever trim later to a 55 Series exit device that was installed as exit only?
Yes. The 370 Series is a modular trim platform, so a 55 Series device installed without outside trim can take a 375L later without replacing the device. You will need the trim in the correct hand, the lever design and finish you want, and a mortise cylinder in your keyway. This is the usual path when a tenant space changes use and a push-bar-only exit door now needs controlled entry from outside.
9) Is the Von Duprin 375L Grade 1, and is it heavy enough for a school or hospital entrance?
Certified to ANSI/BHMA A156.3 2014 Grade 1 and rated heavy duty, the 375L is built for commercial traffic, the tier specified for school corridors, hospital entries and other high-cycle openings. Grade 1 is the top of the three ANSI/BHMA grades for exit devices, above Grade 2 and Grade 3. For comparison, the Falcon 179L and 212L exit trims are medium duty units, which is a lighter service class than what the 375L is rated for.
10) What lever designs and finishes can I get on the Von Duprin 375L?
Seven lever designs are available on the 375L: 01, 02, 03, 06, 07, 12 and 16. The lever design is a required choice on the order, so pick the one that matches the levers already on your other openings. 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. For a property manager matching a building standard, 626 satin chrome is the common commercial finish and 613 the usual dark option.
11) What is the difference between the 375L and a storeroom or nightlatch exit trim?
Function is the whole difference. The 375L holds a state: key it unlocked and the lever stays free until someone keys it locked. A storeroom trim never unlocks, the lever is always rigid and the key is required every time, which is what the Design Hardware KIL storeroom trim, the Tell EDELT80 and the Marks USA M195F provide. A nightlatch trim has no working lever for entry at all, the key retracts the latch, which is what the Sargent 704ET and 744 and the Corbin Russwin VT957ET do. Pick the 375L when a door needs to be unlocked for business hours and secured after.
12) We key everything to a Schlage C keyway. Is there an exit trim that comes keyed instead of taking a mortise cylinder?
The Von Duprin 375L accepts a mortise cylinder, so it is ordered less cylinder and keyed into whatever system the facility runs. If you would rather buy the trim with the keyway already set, the Design Hardware KIL entry function and KIL storeroom function exit trims are Grade 1 flat lever trims built for 1000 and 2000 Series exit devices with a Schlage C keyway. The difference in day to day use is the function: entry lets the key unlock the outside lever, storeroom keeps the outside lever locked and uses the key to retract the latch, while the 375L key locks and unlocks.
13) I want the exterior side to use a code instead of a key. What replaces a keyed lever trim like the 375L?
Swapping key control for a code means moving off a cylinder trim entirely. The Von Duprin 375L takes a mortise cylinder and key locks and unlocks the opening. The Dormakaba E-Plex 201U is an electronic pushbutton exit trim in the E-Plex 2000 Series for wide stile doors, and the Dormakaba PowerPlex P201U is an exit trim for rim, mortise and surface vertical rod devices. Pushbutton trim removes the need to issue and rekey keys across a facility, but it has to be matched to the exit device and stile on the opening.
14) Is a lever the only handle option, or can I get a thumbpiece or pull for the same kind of opening?
The Von Duprin 375L is a lever trim. On comparable exit devices the same opening can be handled a few other ways: the Tell EDTHP53 is a thumbpiece trim with a keyed entry function for doors 1-3/8 inch to 1-3/4 inch, the Dexter ED1000T-CLRM-TP-NC is a Grade 1 classroom trim combining a thumbpiece, pull plate and cylinder supplied less cylinder, and the Design Hardware 2P-03NL is a Grade 1 pull trim with a cylinder hole and night latch function for 1000R and 2000R devices. Levers are generally the choice where ADA operation matters, since they open without grasping or twisting.
15) Are there lighter duty alternatives to a Grade 1 heavy duty exit trim for a lower traffic door?
The Von Duprin 375L is Grade 1 and rated heavy duty for commercial use. Where the traffic is lighter, the Falcon 179L is a medium duty classroom function lever control trim in the 1790 Series and the Falcon 212L is a medium duty blank escutcheon trim in the 20 Series. The Delaney 500L entrance function lever trim is available in CT, MD and SD lever styles. Bear in mind that fire rated and life safety openings usually carry a specified grade on the drawing, so check the spec before stepping down from Grade 1.
16) We are standardizing classroom doors across a campus. How does a classroom function trim differ from the 375L?
The Von Duprin 375L is a Grade 1 heavy duty trim whose key locks and unlocks the outside lever, so an authorized keyholder sets the door state and it stays that way. A classroom function trim is the alternative pattern: the Falcon 510L is a heavy duty classroom lever trim for 24/25 Series devices, the Falcon 179L is a medium duty classroom lever control trim in the 1790 Series, and the Accentra 446F is a Grade 1 classroom function trim with an Augusta lever. Pick the pattern that matches your lockdown procedure, then hold it consistent across the campus so one key routine works on every door.
17) What lever trims are made for Corbin Russwin and Sargent exit devices rather than Von Duprin?
Exit device trim is matched to the device family, so a Von Duprin 375L built for the 55 Series does not cross over. On the Corbin Russwin side, the x810ET is a Grade 1 passage function trim for ED4000 Series SecureBolt, rim, surface and concealed vertical rod devices, the x910ET is a Grade 1 passage function heavy duty trim for ED5200S, ED5200, ED5400 and ED5800 Series devices, and the VT957ET is a nightlatch escutcheon trim in stamped or formed stainless steel for ED5000 Series devices. On the Sargent side, the 744 is a Grade 1 freewheeling night latch trim where the key retracts the latch, for surface vertical rod and mortise 8700 and 8900 Series devices. Identify the device on the door first, then order the trim built for it.
18) Do I need to specify handing on comparable exit trims, or are some field reversible?
The Von Duprin 375L is handed and is ordered as right hand reverse or left hand reverse. Some comparable trims avoid that step: the Sargent 704ET is a Grade 1 heavy duty night latch lever trim with field reversible operation, and the Command Access ET26 is an electrified exit trim with Grade 1 construction and a field reversible design. Field reversible trim is useful when a contractor is stocking for a run of openings with mixed handing; a handed trim needs the hand confirmed at the door before it ships.
19) Is the Von Duprin 375L suitable for a residential apartment unit door?
No. The 375L is a commercial rated trim for a 55 Series exit device, and exit devices belong on egress doors: stairwells, corridors, exterior exits and common area doors in a multi-tenant building. An individual apartment entry door takes a mortise lock or a cylindrical lockset, not exit device trim. Where the 375L does fit multi-family is the building's common egress openings.
20) Our doors are 1-3/4 inch. Which comparable exit trims state a door thickness range?
Among comparable exit device trims, the Pamex E9000 Grade 1 storeroom trim covers doors 1-3/8 inch to 2 inch, and the Tell EDELT53 entry function trim, EDELT80 storeroom function trim and EDPT pull trim each cover 1-3/8 inch to 1-3/4 inch. A 1-3/4 inch door, the common commercial thickness, falls inside all four. The functions differ: EDELT53 is keyed entry, EDELT80 is storeroom, and the Pamex E9000 is storeroom with an L3 lever, versus the key locks and unlocks function of the Von Duprin 375L.
21) Which comparable exit trims use a rose instead of an escutcheon plate?
Trim style changes what the door face looks like and what it covers. The Marks USA M195F is a storeroom function lever and rose exit device trim with spring loaded roses for M9900 touchbar devices, and the Marks USA M195N is a lever and rose trim in the M195N Series. Escutcheon style trims include the Accentra 426F Augusta lever escutcheon trim for 6000 and 1800 Series devices, the Dorma YR03R wide stile escutcheon with R lever in night latch function supplied less cylinder, and the Design Hardware LE08 Grade 1 entry function flat lever with escutcheon for 1000R and 2000R devices. An escutcheon covers more of the door face, which matters when replacing trim over existing prep.
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