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 PRODUCT TYPE
DUST COLLECTOR ACCESSORY
MODEL, NUMBER/SERIES
BLOW BACK DAMPERS
 APPLICATION TYPE
HAZARDOUS COLLECTORS
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HIGHLIGHTED FEATURES
 FLANGE BEARING
 COVER TYPE ACCESS DOOR
 INLET AND OUTLET BOLTABLE RING
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GENERAL INFORMATION
Blow back dampers are used on the inlet of hazardous dust collectors. They ensure no re-entrainment occurs when the blower is off. They also ensure there is a seal, if a fire occurs, stopping the smoke from returning to the shop via the ductwork. These are constructed of heavy-duty metal and custom sizes are available.
ADVANTAGES / FEATURES
- Added safety, seal, in case of a fire
- Prevents any re-entrainment when the dust collectors is inactive
- Low capital investment and maintenance costs
- Ease of inspection even while in operation
- Helps conforming to NFPA standards
THEORY OF OPERATION
HOW BLOW BACK DAMPERS WORK
- The hinged door swings open under vacuum to let the air and the particles into the dust collector’s inlet.
- When the blower is turned off, the door drops down and closes itself via gravity, ensuring that no re-entrainment occurs.
- The valve also acts as a seal in case of a fire, preventing the smoke from going back to the shop.
(Illustrations explaining the inner workings of a blow back damper or video of the damper in use/action coming soon.)
SELECTION CRITERIA
DIMENSIONS & SPECIFICATIONS
- Models range from 6” to 42”
- Depending upon the model, the width, depth and height will vary
- Weight will also vary depending on the model
CHARACTERISTICS AND OPTIONS
APPLICATIONS
- All non oxidized dust particles applications
STANDARD CHARACTERISTICS
- 12 gauge steel construction
- Standard sizes from 6'' to 42''
- Flange bearings
- Cover type access door
- Inlet and outlet boltable ring
OPTIONS & ACCESSORIES
- Companion flanges
- Anti-abrasion hinged plate
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