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Pressure Relief Doors
High Performance Pressure Relief Doors
The function of the pressure relief door is to prevent ductwork from imploding or exploding in the event dampers close while the fan is still operating.

The Positive and Negative Pressure Relief Doors are designed to open automatically 1” w.g. above normal operating system pressure.

Opening outward or inward at a specified pressure setting, the doors permit rapid neutralization of the pressure differential between the inside and outside of the HVAC system.
› Positive and Negative Pressure
› Innovative Non-Mechanical Latch System
› Excellent Sealing
› Insulated to R 6.5
› Easy to Install
› Patent Pending

CONSTRUCTION
FRAME
• 0.62” thick aluminum extrusion, Z/T shape.
DOOR
• .050” thick aluminum extruded perimeter with 24 to 16 gage skin and polyurethane foam filled sealed core (NFPA 90A compliant).
TRIM FLANGE
• 1” (25mm) around entire perimeter.
SEAL
• Co-extruded Leaf Gasket made of PVC.
RANGE OF SETTINGS
• Factory adjusted pressure settings range from 1” w.g. to 12” w.g. Door is specifically set 1” above normal operating system pressure unless otherwise specified.
CABLE ASSEMBLY WITH SPRING
• Cable assembly limits door opening to 80º preventing door and duct damage.
Note: all downloads are in PDF format. If you do not
have Adobe Acrobat Reader, Click here for a free copy.


LATCH
• Adjustable latch assembly is factory set at desired relief pressure. Pressure must be given at time of order to properly place latch. Latch is field adjustable.

SERVICE TEMPERATURE
• -40ºF (-40ºC) Minimum to 120ºF (49ºC) Maximum

DOOR SIZES
Pressure Relief Outswing Model PZ-10
• 10” X 10” (254 X 254*)
• 12” X 12” (305 X 305*)
• 18” X 18” (457 X 457*)
• 24” X 24” (610 X 610*)

Pressure Relief Inswing Model VT-10
• 10” X 10” (254 X 254*)
• 12” X 12” (305 X 305*)
• 18” X 18” (457 X 457*)
• 24” X 24” (610 X 610*)
*metric measurement
1217 Oak Street • Bloomer, WI 54724 • 1-800-328-9448 • Tel: 715-568-2204 • Fax: 715-568-3099