HVAC Pressure Relief Access Doors

High Performance Pressure Relief Doors

US Patent Number: 7,275,560
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 gauge 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. 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


Technical Information

Adjustment Instructions

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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 measurementPressure Relief Door with Factory Installed Magnetic Contact SwitchVacuum Relief Door with Factory Installed Magnetic Contact SwitchMagnetic Switch OptionsSST Option: Magnetic Contact, Surface Mount, Electrical Configuration SPDT, Loop Configuration, Closed and Open.  Lead Size #22 AWG, Material Metal , Max. Current  .2 Amps, Max Voltage 30VDC/VAC, Max. Gap Distance 1-1/4”, Length 5/8”, Height 3/8”, Width 2”, Depth 5/8”, Lead Length 18”, Operating Temp Range -15–160F, Response Time (Sec.) .5mn Max, Standards No, Includes hardware

Plated Steel Option: Magnetic Contact, Surface Mount, Electrical Configuration SPDT, Loop Configuration, Closed and Open.  Operating Temp Range -15– 160F