12" Barometric Bypass Damper

FEATURES

Round bypass damper is designed to relieve air pressure when less than all zones are open. The 8” bolt with weight is screwed into a threaded donut that is mounted around end of the damper shaft. The damper can be mounted in the vertical or horizontal position by rotating the donut and tightening the weighted arm in the correct position.

• Establish full airflow throughout the system with all zone dampers open
• Grip the shaft and hold the damper blade in the closed position
• Adjust the weighted arm to the four o’clock position if airflow is left to right
• Adjust the weighted arm to the eight o’clock position if airflow is right to left
• Slide weight so that blade stays closed when all dampers are open
• NOTE: Extra weight may be required on upflow applications. Always position blade to be closed when all zones are open.
• Static pressure controlling design
• Adjustable weighted arm
• Sturdy steel cylinder
• 24 gauge g‐90 material
• Solid aluminum shaft
• Shaft can be attached on either side of damper
• Rubber seal provides positive stop of air flow
• Long life nylon shaft bushings
• Quality design
• Superior features
• Flexible installation ‐ one crimped end, one straight end
• Mount in any position ‐ vertical or horizontal
• High visibility arrow indicates airflow direction