Both round and rectangular single blade construction, as well as multi-blade construction models are available. Designed to regulate the flow of air in an HVAC system. They are not intended to be used in applications as a positive shut off or for automatic control.
Models MBD/MBDR
Models come standard with a locking manual quadrant. An optional standoff bracket is available for installations using insulated duct.
Models come standard with a locking manual quadrant. An optional standoff bracket is available for installations using insulated duct.