Von Duprin 3347A-EO Concealed ...
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$2,602.62
Von Duprin 3347A-EO Concealed Vertical Rod Exit Device, Exit Only Less Bottom Rod, Narrow Stile, Grade 1

Von Duprin 3347A-EO Concealed Vertical Rod Exit Device, Exit Only Less Bottom Rod, Narrow Stile, Grade 1

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Model: 3347A-EO-3FT-26D-LBR
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Von Duprin 3347A-EO Concealed Vertical Rod Exit Device, Exit Only Less Bottom Rod, Narrow Stile, Grade 1

33A Series Concealed Vertical Rod Exit Device for Narrow Stile Single and Double Doors

The Von Duprin 3347A-EO is a commercial-grade concealed vertical rod exit device from the 33A Series, engineered for exit-only applications and supplied less bottom rod. Designed to fit door stiles as narrow as 2-1/8" (44 mm) for metal doors and as narrow as 4" (102 mm) for wood door stiles, this device is UL listed for panic exit hardware and meets ANSI A156.3 – 2001 Grade 1 standards. The 3347A features a grooved case and is non-handed except when the SS (signal switch) option is used, offering flexible installation across a wide range of single and double door configurations. The device centerline is set at 39-13/16" (1006 mm) from finished floor, and the deadlocking anti-friction top and bottom bolt delivers a 5/8" (16 mm) throw for reliable latching performance.

Professional Features & Benefits

  • Narrow Stile Compatibility: Fits metal door stiles as narrow as 2-1/8" (44 mm) and wood door stiles as narrow as 4" (102 mm), making it ideal for narrow stile door applications.
  • Door Size Coverage: Available in device lengths for 3' doors (660 mm to 914 mm) and 4' doors (813 mm to 1219 mm), with device lengths of 2' for each size range.
  • Precise Dimensional Specifications: Center case dimensions of 8-13/16" x 2-13/32" x 1-9/16" (208 mm x 62 mm x 40 mm); mechanism case dimensions of 2-1/4" x 2-1/4" (57 mm x 57 mm); top & bottom latch dimensions of 3-3/4" x 1-1/2" x 1" (89 mm x 38 mm x 25 mm).
  • Adjustable Vertical Rods: Round 2-piece adjustable rods with top rod adjustable from 6'8" (2027 mm) to 8'4" (2533 mm) and bottom rod adjustable from 35-5/8" (905 mm) to 49-5/8" (1260 mm); extension rod kits available for doors over 8'4" (2533 mm).
  • Pushbar Projection: Pushbar neutral projection of 3-13/16" (97 mm) and pushbar depressed projection of 3-1/16" (78 mm) for ergonomic, code-compliant egress.
  • Deadlocking Anti-Friction Latch: Top and bottom bolt with 5/8" (16 mm) throw provides secure, reliable latching with anti-friction design for smooth operation.
  • Hex Key Dogging: Hex key dogging configuration allows the pushbar to be held in the depressed position for high-traffic or prop-open applications.
  • Included Fasteners: Includes 1-3/4" (44 mm) and 2-1/4" (57 mm) wood and metal door fasteners; #425 SNB furnished standard for end case; #325 SNB furnished standard for EO (exit only) device.
  • UL Listed & Grade 1 Certified: UL listed for panic exit hardware and ANSI A156.3 – 2001 Grade 1 certified for demanding commercial applications.
  • Non-Handed Design: Non-handed except when the SS (signal switch) option is used, simplifying specification and installation across varied door configurations.

Technical Specifications

  • Product Group: Exit Devices and Trim
  • Series: 33 Series
  • Grade: Grade 1
  • Fasteners: Includes 1-3/4" and 2-1/4" wood/metal door fasteners, SNB included
  • Product Subgroup: Exit Devices - Vertical Rod
  • Product Type: Exit Devices - Concealed Vertical Rod
  • Subcategory: Concealed Vertical Rod Exit Devices
  • Latch Throw: Deadlocking anti-friction top & bottom bolt 5/8" throw
  • Commercial/Residential: Commercial
  • Device Centerline from Finished Floor: 39-13/16"
  • Stile Type: Narrow Stile
  • MAP Policy: Yes
  • Product Model: 3347A-EO
  • Product Function: EO
  • Door Hand Direction: Non-Handed
  • Door Thickness Range: 1-3/4"
  • Dogging Configuration: Hex Key Dogging
  • Product Dimension: 8-3/16" x 1-9/16" x 2-13/32"
  • Product Projection: 3-13/16"
  • Product Style: Push Pads
  • 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 concealed vertical rod exit devices are engineered to meet the rigorous demands of commercial door hardware applications, with the 3347A-EO achieving ANSI A156.3 – 2001 Grade 1 certification and UL listing for panic exit hardware. The grooved case construction, deadlocking anti-friction latch bolt, and adjustable rod system deliver dependable performance across a wide range of door sizes and stile configurations. Engineered for demanding commercial environments where code compliance, durability, and reliable egress are essential.

Product Specs

Product Group:
Exit Devices and Trim
Series:
33 Series
Grade:
Grade 1
Fasteners:
Includes 1-3/4" and 2-1/4" wood/metal door fasteners, SNB included
Product Subgroup:
Exit Devices - Vertical Rod
Product Type:
Exit Devices - Concealed Vertical Rod
Subcategory:
Concealed Vertical Rod Exit Devices
Latch Throw:
Deadlocking anti-friction top & bottom bolt 5/8" throw
Commercial/Residential:
Commercial
Device Centerline from Finished Floor:
39-13/16"
Stile Type:
Narrow Stile
MAP Policy:
Yes
Product Model:
3347A-EO
Product Function:
EO
Door Hand Direction:
Non-Handed
Door Thickness Range:
1-3/4"
Dogging Configuration:
Hex Key Dogging
Product Dimension:
8-3/16" x 1-9/16" x 2-13/32"
Product Projection:
3-13/16"
Product Style:
Push Pads
Product Category:
Exit Devices and Trim
Department:
Door Hardware

Von Duprin 3347A-EO-3FT-26D-LBR – Frequently Asked Questions

1) What does "less bottom rod" mean on the Von Duprin 3347A-EO, and what am I giving up?
Less bottom rod means the device ships with the top rod and top latch only, so it latches into the frame head and nothing runs to the floor. That removes the bottom rod and floor strike from the opening, which is what people want in high-traffic doorways where the bottom rod gets kicked, and where debris or water at the threshold jams a floor strike. You lose the second latching point at the sill, so security at the bottom of the door comes from the door's own fit rather than a bolt. The top bolt is a deadlocking anti-friction bolt with a 5/8 inch (16 mm) throw.
2) Is the Von Duprin 3347A-EO handed? I don't know the hand of the door yet.
Non-handed, so you can order it before the hand is confirmed and it will work on either a left or right hand door. The one exception is the SS (signal switch) option, which makes the device handed. Order that option and you need the hand.
3) Can the Von Duprin 3347A-EO be locked or unlocked from the outside?
No. EO stands for exit only, meaning there is no outside trim and no exterior operation at all. Push the bar from the inside to get out, and from the outside the door is simply a pulled-shut, latched door with no lever, no cylinder, and no pull function. If you need key access or a lever on the outside, this is the wrong model and you want a device that accepts trim. Among concealed vertical rod devices, the Corbin Russwin ED4800 is a Grade 1 narrow stile device listed as accepting trim.
4) Does the Von Duprin 3347A-EO meet Grade 1 and is it UL listed for panic hardware?
Grade 1 under ANSI A156.3 - 2001, and UL listed for panic exit hardware. That is the pair of credentials a facility spec or an inspector will ask for on an egress door in a commercial building. Grade 1 is the highest of the three ANSI/BHMA operational grades for exit devices.
5) The opening needs a fire rated concealed vertical rod device instead of the 3347A-EO. What should be used?
The 3347A-EO is a non-fire-rated panic device. For a fire rated opening, the Adams Rite 3600 Series and 3900 Series are both fire rated Grade 1 concealed vertical rod exit devices, the 3900 carrying a 1-1/2 hour rating; both are wide stile. The Sargent 12-MD8613 is a fire rated Grade 1 concealed vertical rod device in classroom function, also wide stile. Because all three are wide stile, confirm the door stile will take them before swapping off a narrow stile opening.
6) Should I use a concealed vertical rod device or a rim device with a mullion on my pair of doors?
A concealed vertical rod device latches up into the head of the frame, so a pair of doors can be secured with no center mullion and the full clear opening stays free. That matters for moving furniture, carts, and gurneys. The rods run inside the door itself, so nothing is exposed to get bent or vandalized, but the door has to be prepped for concealed rods, which usually means a factory-prepped door rather than a retrofit into a solid one. A rim device with a removable mullion is the simpler and cheaper route if your doors are not prepped, at the cost of a post in the middle of the opening.
7) How far does the Von Duprin 3347A-EO push bar stick out into the opening?
3-13/16 inches (97 mm) at rest, dropping to 3-1/16 inches (78 mm) when the bar is depressed. That is the number to check against your clear width if the door swings into a corridor or against a wall, and against the required egress width on the drawing. The device centerline sits 39-13/16 inches (1006 mm) above finished floor.
8) Can I hold the Von Duprin 3347A-EO unlatched during business hours?
Yes, it comes with hex key dogging. Insert the hex key and the push bar holds in the depressed position, retracting the latch so the door pushes open freely. That is what you want on a retail or office entrance during open hours, and you undog it at close. Hex key dogging is mechanical, so it works with no power and no electrified option.
9) Do I need to buy screws and fasteners separately for the Von Duprin 3347A-EO?
No, the fastener pack is in the box. It includes 1-3/4 inch (44 mm) and 2-1/4 inch (57 mm) wood and metal door fasteners, plus sex nuts and bolts: #425 SNB for the end case and #325 SNB for the EO device. What is not in the box is the door prep. Concealed rods need the door routed and the frame strike prepped, so confirm that before the crew shows up.
10) What is a comparable narrow stile concealed vertical rod exit device if the Von Duprin 33A doesn't suit?
Several narrow stile concealed vertical rod devices are close in class. The Falcon 1690EO and the Falcon 24-C are Grade 1 narrow stile exit-only devices rated for 1-3/4 inch doors, the same thickness the 3347A-EO takes. The Corbin Russwin ED4800 is Grade 1 narrow stile and accepts trim if you later need outside access, and the ED7800 is the crossbar version rather than a push pad. The DORMA 9600BB is Grade 1 narrow stile and covers 1-3/4 to 2-1/4 inch doors, which is the one to look at if your door is thicker than 1-3/4 inches.
11) What is a narrow stile alternative to the 3347A-EO for aluminum storefront doors?
The Adams Rite 8600 Series is a narrow stile Grade 1 concealed vertical rod exit device built for aluminum doors, and the DORMA 9600BB is a narrow stile Grade 1 heavy duty concealed vertical rod push pad device covering 1-3/4 inch to 2-1/4 inch doors. The CRL Jackson 1285 is a push pad concealed vertical rod panic exit in exit only function fitting narrow, medium or wide stiles, which suits a mixed storefront where stile widths vary opening to opening.
12) Which concealed vertical rod devices fit a wide stile door where the 3347A-EO will not?
The 3347A-EO is a narrow stile device. On a wide stile opening, the Corbin Russwin ED5800 is a Grade 1 wide stile concealed vertical rod device for 1-3/4 inch doors, the DORMA 9100 Series is a Grade 1 heavy duty wide stile push pad concealed vertical rod device for 1-3/4 inch to 2-1/4 inch doors, and the Adams Rite 8500 Series is a Grade 1 wide stile concealed vertical rod device for hollow metal doors. The BEST Precision 2801 is another wide stile concealed vertical rod option.
13) Is the Falcon 1491DT a substitute for the Von Duprin 3347A-EO?
No. The Falcon 1491DT is a dummy function narrow stile concealed vertical rod device supplied with a 9970 pull; dummy trim does not latch or release, so it cannot serve an egress opening. The 3347A-EO is an exit only panic device with a deadlocking anti-friction top and bottom bolt at 5/8 inch throw. A dummy device is used on the inactive leaf of a pair for appearance match, not as a functioning exit.
14) How does the Sargent MD8613F compare with the Von Duprin 3347A-EO for a metal door with hex dogging?
Both use hex key dogging. The 3347A-EO carries hex key dogging and is a Grade 1 narrow stile concealed vertical rod device; the Sargent MD8613F-LTRIM is a Grade 1 heavy duty 80 Series concealed vertical rod device for metal doors at 36 inches by 84 inches with hex dogging and lever trim. The Sargent comes configured with trim, so it addresses an opening where the outside face must be operable, while the 3347A-EO is exit only.
15) What non-handed concealed vertical rod exit device can be stocked alongside the 3347A-EO for a mixed fleet of doors?
The 3347A-EO is non-handed, so one part covers both swings. The BEST Precision 2601 is likewise a narrow stile non-handed concealed vertical rod exit device in exit only function, and the CRL Jackson 1085 is a 48 inch non-handed concealed vertical rod panic exit in exit only function for wide stile doors. Stocking non-handed devices keeps a facility from carrying left and right versions of the same part.
16) What are the case dimensions on the Von Duprin 3347A-EO for checking clearance on a narrow rail?
The center case measures 8-3/16" x 1-9/16" x 2-13/32", published elsewhere in metric as 208 mm x 62 mm x 40 mm. The mechanism case is 2-1/4" x 2-1/4" (57 mm x 57 mm) and each latch is 3-3/4" x 1-1/2" x 1" (89 mm x 38 mm x 25 mm). Those are the footprints that have to sit inside the rail on an aluminum door.
17) What size and finish does the Von Duprin 3347A-EO come in for a 3 foot door?
The device is offered in 36 inch in 626 satin chrome, which covers a standard 3 foot opening. Across the 33A range, device lengths cover 3 foot doors (660 mm to 914 mm) and 4 foot doors (813 mm to 1219 mm). Satin chrome is the common commercial finish and will match most existing aluminum storefront hardware without standing out.
18) What concealed vertical rod device fits a wood door if the 3347A-EO is not the right choice?
The BEST Precision 2701 is a wide stile reversible concealed vertical rod exit device made for wood doors. The 3347A-EO is a narrow stile device and ships with both 1-3/4 inch and 2-1/4 inch wood and metal door fasteners, so on a wood door with a stile wide enough it remains workable; the 2701 is the option when the door is wood and wide stile.
How fast can I get the Von Duprin 3347A-EO-3FT-26D-LBR delivered?
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Can I return it if it doesn’t work for me?
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Does the Von Duprin 3347A-EO-3FT-26D-LBR come with a warranty?
Absolutely. The Von Duprin 3347A-EO-3FT-26D-LBR 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 Von Duprin 3347A-EO-3FT-26D-LBR?
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