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Pass-Through Chambers with Fire-Rated Door

Fire-Rated Door

CleanSeam pass-through with fire-rated door (No. 1993-82A).

Testing Standards:
  canada and us Ul logo
ValuLine pass-through chamber's UL-B fire-rated door with easy-grip knob (No. 2634-72).
  • Fire-rated access panels carry the UL-B label for 90-minute fire exposure (suitable for 2-hour wall rating)
  • 304 stainless steel chamber provides a durable, chemical-resistant pass-through hatch
  • Standard and CleamSeam™ models: Access door on non-rated side includes LiftLatch™ and static-dissipative PVC viewing window
  • ValuLine™ models: access doors include expansion latches

These pass-through chambers are designed for installation in a fire-rated cleanroom or laboratory wall. They allow transfer of materials into and out of the controlled environment, and their rugged, automatic interlock mechanism offers high reliability with no maintenance (door interlocks not included on ValuLine models).

Fire-Rated Access Doors

Each chamber features a 2.56" (65 mm) -thick, uninsulated 304 stainless steel access panel (door) with a pull handle. Its one-inch exposed flange can be mounted on any typical wall material. These modules bear a UL- listed “B” label for 1.5 hours in walls (maximum temperature rise to 250°F (121°C) in 30 minutes). Both doors are self-closing.

Three stainless steel chamber designs are available. Standard models are with non-continuous seam welds and flush handle on fire-rated door. CleanSeam models feature the flush door handle and continuous-seam welds, minimizing the chance of particle influx and making them easy to clean and sterilize. Finally, economical ValuLine pass-through chamber designs are fabricated with non-continuous seam welds, 304 stainless steel, and an easy-grip knurled door knob.

Architects & Builders: Click resource icons
SPEC logo BIM logo
Chambers Tailored to Your Requirements
Modifications are no problem, as long as you keep these points in mind to retain the UL-B fire-rating:
  • Door thickness cannot be modified
  • Pass-through chamber width and height dimensions other than what is shown in the ordering chart are possible, but are restricted to the outside dimensional (OD) range between 12” W x 12” H and 36” W x 48”H

  • Discuss your specific needs with a Terra Product Specialist.
Pass-Throughs with Fire-Rated Doors*
Outside Dimensions
W" x D" x H"(mm)
Inside Clearance
W" x D" x H"(mm)
Standard Chambers ** CleanSeam Chambers
Cat. # Price Cat. # Price
12 x 14.5 x 12
(305 x 368 x 305)
9.8 x 12 x 10.6
(249 x 305 x 269)
1993-71A $ 4,123 1993-77A $ 4,794
18 x 20.5 x 24
(457 x 521 x 610)
15.8 x 18 x 22.6
(401 x 457 x 574)
1993-72A $ 5,324 1993-78A $ 5,995
24 x 26.5 x 24
(610 x 673 x 610)
21.8 x 24 x 22.6
(558 x 610 x 574)
1993-73A $ 6,470 1993-79A $ 7,141
24 x 26.5 x 48
(610 x 673 x 1219)
21.8 x 24 x 46.6
(558 x 610 x 1118)
1993-74A $ 7,616 1993-80A $ 8,286
36 x 38.5 x 36
(914 x 977 x 914)
33.8 x 36 x 34.6
(859 x 914 x 879)
1993-75A $ 8,798 1993-81A $ 9,469
36 x 38.5 x 48
(914 x 977 x 1219)
33.8 x 36 x 46.6
(859 x 914 x 1118)
1993-76A $ 9,944 1993-82A $ 10,615
* For wall cut-out, add 0.5" (13 mm) to overall width x height. All models include support brackets and interlock mechanism.
** Features non-continuous seam welds. For critical low-contamination applications, select continuous-seam CleanSeam™ chambers.
ValuLine Pass-Throughs with Fire-Rated Doors
Outside Dimensions W" x D" x H" (mm) Cat. # Price
12 x 12 x 12 (305 x 305 x 305) 2634-72A $ 2,663
18 x 18 x 18 (457 x 457 x 457) 2634-73A Call TUI
24 x 24 x 24 (610 x 610 x 610) 2634-74A $ 4,085

Access Clearances


Access Clearances
Width = W (nominal) – 1.88"
Depth = D (nominal)* – 0.12"
Height = H (nominal) – 1.25"

Wall Cut-Out = W (nominal) + 0.5" x H (nominal) + 0.5"


Standard Door Configuration

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Call to discuss your facility and schedule.

Fire-Rated Pass-Through Installation

Pass-Through Installation
Fire-Rated Pass-Through Chambers can be installed in a number of ways, depending on the wall or door that will support them. The cut-out size necessary to support each model size is the chamber width and height with an additional 0.5" (13 mm). Terra offers support brackets and hardware to ensure secure mounting (order separately). In most cases, a bracket kit provides ample support. Select support brackets for 36"D (914 mm) wall-mount models to brace the larger chamber. Two brackets are recommended for wide chambers (installed side-by-side on the wall).


Support Brackets
Two recommended for cabinets 36"D (914 mm)
Cat. # Price
Stainless Steel 1993-60C $ 352
Powder-Coated Steel 1993-83C $ 338


File Type File Name Publication Date
Video Fire-Rated Pass-Through Chamber
Fire-rated pass-through chambers from Terra are UL "B" fire-rated for 90-minute fire exposure (suitable for 2-hour wall rating). Watch this video to learn about more features and their advantages, including the self-closing door and rugged, high-use construction.
Video Cleanroom Pass-Through Operational Benefits
Learn about the twelve ways Terra cleanroom pass-through chambers can help overcome your operational challenges such as maintaining cleanliness, reducing cost, and transferring over-sized items into the controlled environment.
Manual (PDF) Fire-Rated Pass-through Chambers: Doc. # 1788-13
This manual contains instructions for installing standard (non-flush mounted) fire-rated pass-through chambers.
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