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Von Duprin 373L Lever Exit Device Trim - Key Locks and Unlocks for 88 Series
Heavy-Duty Grade 1 Control Trim for 88 Series Exit Devices
The Von Duprin 373L is a commercial-grade lever exit device trim from the 370 Series Control Trims line, engineered specifically for compatibility with the Von Duprin 88 Series Exit Device. Featuring a Key Locks and Unlocks function, this heavy-duty lever trim delivers reliable access control in demanding commercial environments. Certified to ANSI/BHMA A156.3 2014 Grade 1 standards, the 373L is built to meet the rigorous performance requirements of high-traffic facilities while offering the modular flexibility Von Duprin is known for.
Professional Features & Benefits
- Key Locks and Unlocks Function: Provides controlled access by allowing authorized personnel to lock or unlock the exit device trim with a key, ideal for securing commercial openings while maintaining egress compliance.
- ANSI/BHMA A156.3 2014 Grade 1 Certified: Meets the highest commercial hardware performance standard, ensuring long-term reliability in heavy-duty applications.
- Fire-Rated Compliance: Listed to ANSI/UL 10C and CAN/ULC-S104 for fire-rated door applications, supporting code-compliant installations on fire-rated openings.
- Additional Code Certifications: Also certified to ANSI/UL 305 and CAN/ULC-S132, providing broad compliance coverage for diverse commercial and institutional applications.
- 88 Series Compatibility: Designed exclusively for use with the Von Duprin 88 Series Exit Device, ensuring seamless integration and proper function with the parent device.
- Modular & Upgradeable Design: Part of Von Duprin's flexible 370 Series Control Trims platform, allowing facilities to add or upgrade trim options as needs evolve without replacing the entire exit device.
- Heavy-Duty Construction: Rated for heavy-duty commercial use, this lever trim is built to withstand the demands of high-traffic openings in commercial facilities.
- Investment Protection: Von Duprin's modular design philosophy enables cost-effective upgrades as mechanical and electronic technology converge, protecting your hardware investment well into the future.
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
- Handle Type: Lever
- Product Model: 373L
- 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 compliance with ANSI/UL 10C, ANSI/UL 305, CAN/ULC-S104, and CAN/ULC-S132 standards. The 370 Series Control Trims platform is engineered with a modular, upgradeable architecture that protects your facility's hardware investment by enabling cost-effective adaptation as needs change. Trusted by commercial facility managers and security professionals, Von Duprin delivers dependable performance where it matters most.
Manufacturer Resources
Von Duprin 88 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
- Handle Type:
- Lever
- Product Model:
- 373L
- Door Hand Direction:
- Yes
- Product Category:
- Exit Devices and Trim
- Department:
- Door Hardware
Von Duprin VON-373L-626 – Frequently Asked Questions
1) Will the Von Duprin 373L trim work on my Von Duprin 88 Series exit device?
That's exactly what the 373L is built for. It's a 370 Series control trim made for the Von Duprin 88 Series exit device, so it mounts to the 88 rim, mortise or vertical rod device it's specified against. It won't fit other manufacturers' devices, and if your device is a Von Duprin 98/99 or a 33A/35A, the 373L is the wrong trim number.
2) What does the Key Locks and Unlocks function on the 373L actually do at the door?
Key locks and unlocks means the cylinder toggles the lever between locked and free. Turn the key one way and the outside lever is dogged unlocked so anyone can pull the door open; turn it back and the lever goes dead and the door is entry-by-key only. That's the function you want on a storefront or office entrance that opens for the day and locks at close, rather than a night latch trim where the key only retracts the latch each time. Egress from the inside is always by the 88 Series push pad, unaffected by the trim setting.
3) Do I have to specify handing when I order the 373L lever trim?
Yes, and it isn't field reversible on the order form. Handing is a required selection: RHR (right hand reverse) or LHR (left hand reverse). Exit device openings are always reverse bevel, so stand outside the door, and if the hinges are on your right it's RHR. Get it wrong and the lever points uphill.
4) Can I use the 373L on a fire rated door?
Yes. The 373L is listed to ANSI/UL 10C and CAN/ULC-S104 for fire door applications, and also carries ANSI/UL 305 and CAN/ULC-S132 listings for panic hardware. Worth noting for the spec: the key locks and unlocks function means the lever can be left unlocked, so confirm your local authority accepts an unlockable outside lever on that particular fire opening.
5) I want key retracts latch only, not a lever that stays unlocked. What should I use instead of the 373L?
The 373L is the wrong function for that. Key locks and unlocks leaves the lever free once you unlock it, which is not what you want on a rear service door. For a night latch trim where the key retracts the latch and the lever never stays unlocked, look at the Sargent 704ET night latch lever trim (field reversible) or the Sargent 704-ETL for PE Series devices. On the Corbin Russwin side, the VT957ET is a nightlatch escutcheon trim for ED5000 Series devices. All are for their own manufacturer's devices, not the Von Duprin 88.
6) What is the closest equivalent to the Von Duprin 373L if the door has a Sargent surface vertical rod or mortise exit device instead of an 88 Series?
The 373L is a Grade 1 heavy duty lever control trim built specifically for the Von Duprin 88 Series exit device, so it will not mount to a Sargent chassis. On Sargent 8700 and 8900 Series surface vertical rod and mortise devices, the Sargent 744 is the Grade 1 trim in that family, with a key retracts latch night latch function and freewheeling lever. Note the functional difference: the 373L keys to lock and unlock the lever, while the 744 keys to retract the latch and leaves the lever inactive between key throws.
7) Is a night latch exit trim a substitute for the Von Duprin 373L?
No, and this is the most common mis-order in exit trim. The 373L is a key locks and unlocks trim: turn the key one way and the lever stays live for anyone approaching from outside, turn it back and the lever is dead until keyed again. A night latch trim such as the Sargent 704ET or the Corbin Russwin VT957ET requires a key for every single entry and never leaves the lever operable. Both are keyed lever trims and look alike on the door, but only the 373L can be left unlocked for a business day.
8) What lever exit trim should be used if the outside lever should always be locked rather than key-selectable?
That is storeroom function, and it is a different part. Storeroom keeps the outside lever rigid at all times and a key momentarily retracts the latch. The Design Hardware KIL storeroom trim is a Grade 1 storeroom function trim for 1000 and 2000 Series devices with a Schlage C keyway and flat lever, the Pamex E9000 is a Grade 1 storeroom L3 lever heavy duty trim covering 1-3/8 inch to 2 inch doors, and the Marks USA M195F is a storeroom function lever and rose trim for M9900 touchbar devices. The Von Duprin 373L instead lets a key set the lever locked or unlocked and leave it there.
9) Which comparable exit device lever trims carry a fire rating like the Von Duprin 373L?
The 373L is listed to ANSI/UL 10C and CAN/ULC-S104 for fire rated door applications, along with ANSI/UL 305 and CAN/ULC-S132. That matters because several lever and escutcheon trims in the same class are not fire rated: the Accentra 121NL nightlatch trim, the 426F Augusta lever escutcheon trim for 6000 and 1800 Series, the AU-441F night latch keyed lever trim, and the 446F classroom trim all carry a fire rating of no. On a labeled opening, that difference decides the order before function does.
10) Is the 373L heavy duty enough for a school or hospital entrance?
It's certified to ANSI/BHMA A156.3 2014 Grade 1 and rated heavy duty commercial, which is the top performance tier for exit hardware and the level normally specified for schools, hospitals and other high traffic institutional openings. It is a commercial trim, not a residential one.
11) Does the Von Duprin 373L come with a cylinder?
The 373L is ordered by finish, lever design and handing. A key locks and unlocks function is driven by a mortise cylinder, so plan on supplying one keyed to your existing system rather than assuming it arrives in the box. Match it to the keyway already in the building so the trim joins your existing master key system.
12) What is the difference between the 373L and a passage function exit trim?
A passage trim has no cylinder and no locking capability at all; the outside lever always retracts the latch. Corbin Russwin builds passage function trim across its Grade 1 exit device lines, including the 3310AET for ED300 Series, the x810ET for ED4000 Series, and the x910ET for the ED5200S, ED5200, ED5400 and ED5800 Series, and the Arrow SRX01 is a passage function Sierra lever trim with rose for ED910, S1150 and S1250 devices. The Von Duprin 373L differs in that a key sets the lever locked or unlocked, so the same door can be free access during hours and secure after.
13) If the opening needs a classroom function instead of key locks and unlocks, what lever exit trim covers that?
Classroom function keys the outside lever to lock or unlock but is specified as its own function code, and several peers carry it directly. The Falcon 510L is a heavy duty classroom function lever trim for 24 and 25 Series devices, and the Accentra 446F is a Grade 1 classroom function trim with the Augusta lever. For a medium duty opening, the Falcon 179L is the classroom lever control trim in the 1790 Series. The 373L stays the choice when the device on the door is an 88 Series.
14) What is the simpler trim to order if the door only needs to be pulled open from outside and never keyed?
Drop the keyed lever entirely. Exit only pull trim gives an outside pull with no cylinder and no locking function: BEST offers the 1701 for wide stile 2000 Series devices and the 2001 narrow stile pull trim with cover plate, and BEST also builds the 2901 narrow stile and 4901 wide stile exit only lever trims if a lever shape is preferred over a pull. The Detex 02BN is a dummy S-lever trim with blank escutcheon for Value Series devices. The Von Duprin 373L is the choice only when a key needs to control whether the lever is live.
15) If a facility wants keypad access on an exit device instead of a keyed lever, what replaces the 373L?
Pushbutton exit trim takes the place of the keyed lever. Dormakaba offers the E-Plex 201U electronic pushbutton exit trim for wide stile applications, the PowerPlex P201U exit trim for rim, mortise and surface vertical rod devices, and the E-Plex 5067 mechanical pushbutton lock mortise, also wide stile. Those trade the key cylinder for a code at the door; the Von Duprin 373L stays mechanical and keeps the opening on the building's existing key system.
16) The exit device on the door takes a thumbpiece rather than a lever - what trim covers that opening?
Thumbpiece trim is a separate part from lever trim and is not interchangeable with it. The Tell EDTHP53 is a thumbpiece trim in keyed entry function for doors 1-3/8 inch to 1-3/4 inch thick, and the Dexter ED1000T-CLRM-TP-NC is a Grade 1 classroom thumbpiece with pull plate and cylinder, supplied less cylinder. The Von Duprin 373L is a lever trim and is ordered with a lever design and a hand.
17) Which keyed lever exit trims are field reversible instead of hand specific like the 373L?
The 373L is ordered to a hand, RHR or LHR, so the hand of the opening has to be confirmed before the order goes in. Two peers avoid that step: the Sargent 704ET is a night latch lever exit trim with field reversible operation, and the Command Access ET26 is a Grade 1 electrified trim with a field reversible design. Both differ in function from the 373L, so reversibility alone is not a reason to swap on an opening that needs key locks and unlocks.
18) For an opening that needs keyed entry rather than key locks and unlocks, what lever trim fits a 1-3/4 inch door?
Keyed entry trim locks and unlocks by key at each use rather than being set to a state. The Tell EDELT53 is an escutcheon lever trim in keyed entry function for 1-3/8 inch to 1-3/4 inch doors, and Design Hardware offers Grade 1 entry function trim as the KIL entry with a Schlage C keyway and flat lever for 1000 and 2000 Series devices and the LE08 flat lever with escutcheon for 1000R and 2000R devices. Delaney's 500L exit trim is an entrance function lever available in CT, MD and SD lever styles.
19) What finishes does the Von Duprin 373L lever trim come in?
Eight finishes: 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 building standard, 626 satin chrome is the usual commercial default and the one most likely to match existing levers and closers already hung.
20) Can I upgrade the trim later without replacing the whole 88 Series exit device?
That's the point of the 370 Series platform. The control trims are modular, so a facility can swap or upgrade the outside trim function on an 88 Series device as needs change, without pulling the device off the door. Useful when a mechanical opening later goes on access control and only the outside trim has to change.
21) Is a blank escutcheon trim the same thing as the 373L lever trim?
No. The Falcon 212L is an escutcheon lever trim in blank escutcheon function for 20 Series devices with shear pin protection, meaning there is no cylinder and no key control of the lever. The Von Duprin 373L carries the key locks and unlocks function, so the lever state is set by key. The two look similar mounted on a door, which is why the function code, not the appearance, should drive the order.
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Absolutely. The Von Duprin VON-373L-626 is backed by a manufacturer’s warranty.
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