Constant flow damper with manual setting of one flow
DAU is a constant flow damper, which facilitates balancing of ventilation systems and gives correct flow from the start.
The unit compensates for e.g. connection and disconnection of system parts, clogging of filters and ducts, thermal lift forces, wind effects, window opening etc.
A special mounting, measuring, balancing and maintenance instruction exists for this product.
The flow is set by loosing the central nut and via the knob turning the scale arrow so it points at the wanted flow on the scale. Then the locking nut is tightened.